FR3072390A1 - EXTENDED COMPOSITION COMPRISING A MIXTURE OF TWO PRODUCTS FOR THE DESTRUCTION OF ORGANOPHOSPHORUS AND / OR ORGANOSOUFRES POLLUTANTS - Google Patents

Abstract

The present invention relates to the decontamination, disinfection and cleaning of surfaces soiled by toxic agents, and more particularly to an improved extemporaneous composition comprising a mixture of two products, allowing ensure the decontamination, the disinfection and the cleaning of surfaces soiled by toxic substances containing organophosphorus or organosoufrés compounds, without degrading the surfaces or the environment.

Description

Extemporaneous composition comprising a mixture of two products for the destruction of organophosphorus and / or organosulfur pollutants

The present invention relates to the decontamination, disinfection and cleaning of surfaces contaminated with toxic agents, and more particularly an improved extemporaneous composition comprising a mixture of two products, making it possible to ensure the decontamination, disinfection and cleaning of surfaces contaminated with toxic substances containing organophosphorus or organosulfur compounds, without degrading surfaces or the environment.

The present invention also relates to the two constituent products of the improved extemporaneous composition claimed as well as their method of preparation and their implementation.

The present invention also relates to a process for destroying these organophosphorus and / or organosulfur pollutants by means of the claimed extemporaneous composition claimed.

Many toxic substances are used in various fields of industry and agriculture, as well as in military applications.

In particular, toxic compounds are widely used in agriculture as insecticides or pesticides for the treatment of cultivated areas.

Thus, there may be mentioned by way of illustration various organophosphorus compounds such as organophosphates, organoamidophosphates, amidophosphates, phosphonothionates, phosphorothionates or also amidophosphorothionates; as well as various organosulfur compounds of the R-S-R ', R and R' type representing in particular hydrocarbon radicals and halogenated hydrocarbon radicals; generally used as insecticides and / or pesticides.

The most common examples among organophosphates are paraoxon [O, O-diethyl-O-pnitrophenyl phosphate], diazinon [O, O-diethyl-O- (2-isopropyl-4-methyl-6-pyhmidyl) phosphorothioate] and parathion [O, O-diethyl-Op-nitrophenyl phosphorothioate].

The most common examples of toxic organosulfur compounds are dichloro-2,2'-diethyl sulfide and / or 2-phenyl-2-chlorodiethyl sulfide which are also very aggressive chemical agents and whose stability allows them to persist on a contaminated site for several years, without experiencing a significant decrease in toxicity.

In the field of chemical warfare agents, there are also many toxic agents, for example organophosphorus esters derived from phosphoric and phosphonic acids, such as Tabun, Sarin and / or Soman which are particularly known because of their neurotoxicity lethal. VX (O-ethyl-S- (diisopropylaminoethyl-2) -methylphosphorothiolate) is also well known as a war nerve agent. Also known are various organosulfurous toxic agents from the vesicant family such as musterite (2,2-dichloro-2,2'diethyl sulfide).

All these toxic compounds are particularly dangerous and it is therefore essential to be able to have means to neutralize them or to decontaminate the materials and / or surfaces which could have been contaminated by an intentional or accidental use of these organosulfur and organophosphorus compounds. This is all the more critical as the stocks of toxic products described above are increasing, for example due to their increasingly intensive use in the field of agriculture.

Thus, it has been proposed in patent application FR2761080 (A1) a cleaning, disinfecting and decontaminating composition, effective against organophosphorus and organosulfur toxic agents, characterized in that it comprises

a) an organic peracid

b) a cationic quaternary ammonium surfactant, and

c) a nonionic surfactant.

As indicated in the description of FR2761080 (A1), the use of these compositions is carried out by dissolving in water, or in an appropriate solvent, with moderate stirring, at a temperature ranging from 20 to 45 degrees C, respecting a contact time from 1 to 10 minutes before use. By way of illustration, example 1 of FR2761080 (A1) describes a composition containing sodium percarbonate (30%), cetyl dimethyl benzyl ammonium chloride (8%), an ethoxylated fatty alcohol (15%), a polyethylene glycol PEG 6000 (5%), an activator - tetracetyl ethylene diamine (16%), sodium tripolyphosphate (15%) and a Na2CO3 / NaHCO3 buffer (10%); said composition being diluted to 20% in water before use.

Although the decontaminating compositions of FR2761080 (Al) have given full satisfaction thanks to their stability and their effectiveness, the Applicant has found that their use sometimes generates a foaming phenomenon which is difficult to control. In addition, the Applicant has found that the addition of anti-foaming agents to the compositions of FR2761080 (Al) tends to reduce the decontaminating effectiveness of the final products. In addition, an improvement in the stability over time of any decontaminating product is always welcome because we rarely know in advance the precise moment when they should be used.

It is therefore important to be able to have available compositions having good stability over time, capable of being preserved for several months, and making it possible to effectively decontaminate, disinfect or clean surfaces soiled with various toxic agents.

Thus, the subject of the present invention is an extemporaneous cleaning, disinfecting and decontaminating composition with improved efficiency, usable for cleaning, disinfecting and decontaminating materials and / or surfaces contaminated with toxic organophosphorus or organosulphurous agents of the type described above. above, and to avoid any foaming problem during its preparation.

More particularly, the invention also relates to an extemporaneous cleaning, disinfecting and decontaminating composition comprising a mixture of two products, having excellent stability over time, an optimized decontamination efficiency and making it possible to avoid any foaming problem during its preparation.

By “extemporaneous composition” within the meaning of the present invention is meant a composition consisting of two parts, this extemporaneous composition being intended for the extemporaneous preparation of a composition according to the present invention, namely a cleaning, disinfecting and decontaminating composition with efficacy improved, usable for cleaning, disinfection and decontamination of materials and / or surfaces soiled by toxic organophosphorus or organosulfur agents.

A feature of the extemporaneous compositions according to the present invention therefore consists in that their implementation is preferably carried out directly at the place of treatment of the materials and / or surfaces soiled with toxic organophosphorus or organosulfur agents. Thus, the mixing between the two products of the extemporaneous composition according to the present invention is preferably carried out only a very short time before the treatment in order to guarantee its effectiveness and to preserve the multitude of advantages compared with the compositions. not extemporaneous from the prior art.

By way of illustration, from the moment when the two products of the extemporaneous composition are mixed, it is advisable to use the extemporaneous composition within a maximum period of three (3) three hours, preferably two (2) hours, in particular during the hour following the mixing operation, see even during the thirty minutes following the mixing operation of the two products of the invention.

The two constituent products, when mixed, of the extemporaneous cleaning composition according to the present invention preferably each have specific characteristics:

Product S

The first product, which we will designate by “Product S” in the description which follows, is a solid product (at 25 ° C. and 1 bar) comprising more than 35% by weight of peroxygen compound, more than 20% by weight of sulfate sodium, and less than 5% by weight of surfactant.

In an embodiment according to the present invention, the Product S has a water content of less than 5% by weight, preferably less than 1% by weight, for example less than 0.1% by weight.

Product S according to the present invention therefore comprises the active principle of the peroxygen compound type in combination with sodium sulfate; the possible presence of surfactant in said Product S being preferably controlled to negligible contents.

By way of illustration, the peroxygen compound used in Product S according to the present invention can be chosen from peracids, peracid salts and / or a mixture of two or more of said peracids and / or peracid salts; these peracids will, for example, be selected from organic mono- or diperacids comprising one or more linear or branched alkyl groups, an aryl group or a heterocyclic group, condensed or not. They can be used alone or as a mixture. By way of example, a peracid and / or peracid salt advantageously used in Product S of the invention can be chosen from peracetic acid, perpropionic acid, perdecanic acid, perdodecanoic acid, pertetradecanoic acid, perlauric acid, perdodecanediolque acid, phthalimidoperpropionic acid, sodium or potassium percarbonate, or magnesium monoperoxyphthalate. According to the invention, use is preferably made of sodium or potassium percarbonate or magnesium monoperoxyphthalate, preferably sodium percarbonate (sometimes called sodium carbonate peroxhydrate, sodium carbonate peroxyhydrate or sodium percarbonate).

In a particular and preferred embodiment according to the present invention, the peroxygen compound used in Product S according to the present invention consists of a peracetic acid generating system; said peracetic acid generating system preferably consists of a mixture of a peracetic acid precursor and a peroxidant. By way of illustration of a peracetic acid precursor, mention will be made of tetraacetylethylene diamine (known under the name of TAED), 3- (dimethylamino) -2,2-dimethyl-7-hydroxy-1-tetralone (known under the name of DADHT), tetracetyl glycoluryl (known as TAGU), and / or etherified or non-etherified and / or non-esterified sugars (ester and / or acetyl), and / or a mixture of two or more of said precursors peracetic acid; preferably tetraacetylethylene diamine (TAED). By way of illustration of a peroxidant, mention may be made of hydrogen peroxide (H ₂ O ₂ ) or any other peroxidant, for example persalts, and / or a mixture of two or more of said peroxidants. Mention will be made, by way of illustration, of persalts such as mono and / or tetra hydrated perborates, percarbonates, etc .; preferably sodium percarbonate (sometimes called sodium carbonate peroxhydrate, sodium carbonate peroxyhydrate or sodium percarbonate).

The total concentration of peroxygen compound in Product S of the invention is greater than 35% by weight, preferably greater than 45% by weight, for example greater than 55% by weight of said Product S. The total concentration of peroxygen compound in Product S of the invention is preferably less than 80% by weight, for example less than 70% by weight of said Product S.

The concentration of sodium sulfate used in Product S according to the present invention is greater than 20% by weight, preferably greater than 25% by weight, for example greater than 30% by weight of said product S. The concentration of sodium sulfate sodium in Product S of the invention is preferably less than 65% by weight, for example less than 40% by weight of said Product S.

Without wishing to be restricted by this explanation, the Applicant believes that sodium sulfate not only makes it possible to improve the decontamination performance during the use of the composition comprising Product S but also to stabilize said product S (for a period much more important than what was possible to date) before its use, when said Product S is stored; more particularly, the Applicant has also found that the storage of Product S at a temperature above room temperature, for example a temperature above 25 degrees centigrade, posed no problem in terms of stability (and efficiency) which represents a very interesting additional advantage.

The measurements carried out on several samples of Product S in accordance with the present invention have indeed demonstrated excellent stability over time not only at 20 ° C., but also at temperatures of 25, 30, 35, 40, and even of 45 ° C, thus showing that Product S can be stored for several months, or even several years without significant loss of their effectiveness and homogeneity.

The concentration of surfactant in Product S of the invention is less than 5% by weight, preferably less than 3% by weight, for example less than 1% by weight of said Product S. In a particular embodiment according to the present invention, Product S is free from any surfactant.

The Products S according to the invention can also advantageously contain additives intended to improve stability and / or acting as anti-redeposition and / or sequestering agents. By way of illustration, we will cite phosphonic acids and / or phosphonates and / or zeolites and / or silicates, for example magnesium silicates, and / or a mixture of two or more of the additives mentioned. By way of example, the doubly hydroxylated magnesium silicate also known as talc may advantageously be used as an additive; TPP (sodium tripolyphosphate) and / or preferably phosphonates such as, for example, a sodium salt of diethylene triamine penta (methylene phosphonic acid) also known under the trade name Dequest® 4066, may also advantageously be used as an additive , preferably in combination with talc. Mention may also be made, by way of illustration, of hydroxyethylidene diphosphonic acid also known under the trade name Dequest® 2010 and sodium hydroxyethylidene diphosphonate also known under the trade name Dequest® 2016. Without wishing to be restricted by this explanation, the applicant believes that 'A special feature of the aforementioned additives is that they prevent any premature degradation of peroxygen compounds during their dissolution due, in particular, to the presence of metallic traces in water; in fact, in the absence of these additives (or masking agents), the said metallic traces seem to favor the decomposition of the peroxygen compounds which decreases their stability and therefore their duration of action once dissolved.

The concentration of additives (intended to improve stability and / or acting as anti-redeposition and / or sequestering agents) used in Product S according to the present invention is preferably greater than 0.5% by weight, for example greater than 1% by weight of said Product S. The concentration of these additives in Product S of the invention is preferably less than 10% by weight, for example less than 7% by weight of said Product S.

In a preferred embodiment according to the present invention, the sum of the peroxygen compounds, sodium sulphate, surfactant (if present) and the aforementioned additives represents at least 85% by weight of the Products S, preferably at least 95% by weight. weight, for example the entire Product S.

Product L

The second product of the extemporaneous cleaning, disinfecting and decontaminating composition according to the present invention, which we will designate by “Product L” in the description which follows, is a liquid product (at 25 ° C. and 1 bar) comprising between 8% and 32 % by weight of cationic quaternary ammonium surfactant, between 15% and 40% by weight of a mixture of two different nonionic surfactants comprising at least one alkylpolyglycoside and an alkoxylated fatty alcohol, between 18% and 40% by weight d 'water, and between 15% and 35% by weight of solvent.

In an embodiment according to the present invention, more than 95% of the water, preferably more than 99% of the water, see all of the water present in the product L comes from the water present in commercial products including said surfactants and solvents.

The cationic surfactants used in Product L according to the present invention are therefore chosen from quaternary ammoniums. They can be used alone or as a mixture. By way of illustration, these cationic surfactants of the quaternary ammonium type can advantageously be represented by the general formula Ri R ₂ R3 R4 N ⁺ X 'in which R _b R ₂ , and R ₃ , identical or different, each represent an alkyl group or hydroxy alkyl having from 1 to 6 carbon atoms, or R 1 and R ₂ combine to form a heterocyclic group, and R 4 represents a linear or branched alkyl group or an aryl or aralkyl group which may contain from 8 to 24 carbon atoms, and X represents an anion such as a halogen or a hydroxyl, carbonate or sulfate group.

Among the above cationic surfactants, use is preferably made of those for which R _b R ₂ and R ₃ represent a methyl or ethyl group, R ₄ represents a cetyl group, and X is a halogen chosen from fluorine, chlorine and bromine.

By way of illustration, as examples of quaternary ammonium surfactants which can be used in the compositions of the invention, mention may be made of cetyl trimethyl ammonium chloride and bromide, cetyl dimethyl benzyl ammonium chloride and bromide, cetyl diaza bromide -1.4 bicyclo [2,2,2] octyl ammonium, cetyl dimethyl hydroxyethyl-2-ammonium chloride, and benzyl dimethyl dodecyl ammonium chloride (or benzyl dimethyl lauryl ammonium chloride).

The concentration of quaternary ammonium surfactant in Product L of the invention can be between 8% and 32% by weight of said Product L. This concentration of quaternary ammonium surfactant is preferably greater than 10% by weight, for example greater at 15% by weight of said Product L. The concentration of quaternary ammonium surfactant in Product L of the invention is preferably less than 30% by weight, for example less than 25% by weight of said Product L.

The quaternary ammonium surfactant used in the invention has the advantage of exerting a certain bactericidal effect by itself, more particularly on gram-positive bacteria.

The liquid product L according to the invention therefore comprises between 15% and 40% by weight of a mixture of two different nonionic surfactants comprising at least one alkylpolyglycoside and an alkoxylated fatty alcohol.

The alkylpolyglycosides used in Product L according to the present invention are generally obtained from a carbohydrate (such as glucose, in which case we will speak of alkylpolyglucoside) and a fatty alcohol. An example of a corresponding alkyl polyglucoside is shown below.

The length of the carbon chain (from fatty alcohol) can vary; a chain having at least 8 carbon atoms, for example from 8 to 36 carbon atoms, will be cited by way of illustration.

The average number of units of sugar grafted per fatty chain can be defined by the degree of polymerization (DP), which degree is generally between 1.2 and 2.

The concentration of nonionic surfactant of alkylpolyglycoside type in Product L of the invention may advantageously be greater than 8% by weight of said Product L, for example greater than 10% by weight of said Product L. Concentration of non-ionic surfactant ionic alkylpolyglycoside type in Product L of the invention is preferably less than 25% by weight, for example less than 20% by weight of said Product L.

The alkoxylated fatty alcohols used in Product L according to the present invention can be selected from polyalkoxylated esters comprising alkyl chains having from 6 to 22 carbon atoms, and in particular polyoxyethylated esters (POE). Mention will also be made, as alkoxylated fatty alcohols, of those corresponding to the formula

R - [(CH ₂ ) ₂ O] _m - [CH ₂ CH (CH ₃ ) O] _n -H in which R is an alkyl or alkenyl comprising from 8 to 22 carbon atoms, preferably 10 to 16 carbon atoms ; n and m, independently, represent an integer ranging from 0 to 50, the sum of which [n + m] is greater than 1. An ethoxylated fatty alcohol is preferably mentioned.

The concentration of nonionic surfactant of alkoxylated fatty alcohol type in Product L of the invention can advantageously be greater than 5% by weight of said Product L, for example greater than 10% by weight of said Product L. Concentration of agent nonionic surfactant of alkoxylated fatty alcohol type in Product L of the invention is preferably less than 25% by weight, for example less than 17% by weight of said Product L.

The solvent used in Product L according to the present invention can advantageously be selected from glycol ethers. By way of illustration, we will cite the ethylene glycol derivatives of general formula RO- (CH2-CH2) nOR 'and / or the propylene glycol derivatives of general formula RO- [CH2-CH (CH3)] nOR' (alpha isomer ). A preferred solvent is dipropylene glycol monomethyl ether also known under the names dipropylene glycol methyl ether, methoxypropoxypropanol, and / or methoxymethylethoxypropanol.

The concentration of solvent in Product L of the invention may advantageously be greater than 18% by weight of said Product L, for example greater than 20% by weight of said Product L. The concentration of solvent in Product L of the invention is preferably less than 35% by weight, for example less than 30% by weight of said Product L.

Thus, the subject of the present invention is an extemporaneous cleaning, disinfecting and decontaminating composition comprising a solid product comprising more than 35% by weight of peroxygenated compound, more than 20% by weight of sodium sulfate, and less than 5% by weight of surfactant, and a liquid product comprising between 8% and 32% by weight of cationic quaternary ammonium surfactant, between 15% and 40% by weight of a mixture of two different nonionic surfactants comprising at least one alkylpolyglycoside and an alkoxylated fatty alcohol, between 18% and 40% by weight of water, and between 15% and 35% by weight of solvent.

In an embodiment according to the present invention, Product S does not include phosphates. In an embodiment according to the present invention, Product L does not contain phosphates. In an embodiment according to the present invention, the extemporaneous cleaning, disinfecting and decontaminating composition claimed does not contain phosphates.

The extemporaneous cleaning, disinfecting and decontaminating compositions of the invention can be implemented by any suitable method.

In an embodiment according to the present invention, the implementation of the extemporaneous cleaning, disinfecting and decontaminating composition of the invention comprises the following steps:

dissolving Product S, mixing Product L and the solution of Product S, and using the mixture as a cleaner, disinfectant and / or decontaminant.

In an embodiment according to the present invention, the dissolution of Product S is carried out at a temperature above 30 degrees centigrade, for example a temperature above 35 degrees centigrade. In an embodiment according to the present invention, the dissolution of Product S is carried out at a temperature below 50 degrees centigrade, for example a temperature below 45 degrees centigrade.

In an embodiment according to the present invention, the solution S is dissolved in water. In an embodiment according to the present invention, the water used for dissolving Product S comprises a content of controlled ferrous and / or manganese ions.

By way of illustration, the content of ferrous ions in the water used for dissolving Product S will preferably be less than ten thousand micrograms per liter of water, for example less than two thousand micrograms per liter of water, per example less than two hundred micrograms per liter of water.

By way of illustration, the content of manganese ions in the water used for dissolving Product S of less than five thousand micrograms per liter of water, for example less than one thousand micrograms per liter of water, for example less than fifty micrograms per liter of water.

In an embodiment according to the present invention, the solution of Product S has a content of Product S greater than 5% by weight, preferably greater than 8% by weight, for example greater than 9% by weight. In an embodiment according to the present invention, the solution of Product S has a content of Product S of less than 20% by weight, preferably less than 15% by weight, for example less than 12% by weight.

In an embodiment according to the present invention, the mixing of Product L and the solution of Product S is carried out by adding Product L to the solution of Product S. Product L can be previously diluted in water but this is not a preferred embodiment according to the present invention.

In an embodiment according to the present invention, the mixture of Product L and the solution of Product S has a content of Product L greater than 5% by weight, preferably greater than 7% by weight, for example greater than 8 % in weight. In an embodiment according to the present invention, the mixture of Product L and the solution of Product S has a content of Product L of less than 20% by weight, preferably less than 15% by weight, for example less than 11 % in weight.

The mixture of Product L and the solution of Product S thus formed can thus be directly used for cleaning, disinfection and / or decontamination (chemical and / or nuclear) according to the present invention; an application of 2 to 4 liters (for example 3 liters) of mixture per square meter of surface to be treated has proven to be particularly effective for decontamination.

The measurements carried out on several samples of the mixtures of Product L and of the solution of Product S in accordance with the present invention demonstrated a stability over time at room temperature greater than that of the compositions of FR2761080 (Al), thus showing the advantage of having an extemporaneous composition.

The extemporaneous compositions according to the present invention can be used both for the decontamination, cleaning and disinfection of surfaces soiled with toxic organophosphorus or organosulfur agents, in outdoor areas, in the open air, or in closed premises. The treatment can be done by applying mixtures of Product L and the solution of Product S directly on the surfaces to be treated, by pouring and spreading using brush devices of the usual type or by cold or hot spraying, at a temperature of the order of 40 to 50 degrees C, using lances or ramps of known type. In the case of decontamination or disinfection of objects, the operations can be carried out by soaking, the objects being immersed in a tank containing a mixture of Product L and the solution of Product S according to the invention. The duration of the soaking can vary from a few minutes to a few hours depending on the nature of the objects and the operating conditions.

The present invention has many advantages over the techniques of the prior art. Other advantages provided by the present invention have been highlighted further in the description; it is clear that this description is illustrative and not limiting. The following examples also illustrate the invention in more detail without limiting its scope.

Examples

The preparation of Product S (see table below for the exact composition) is advantageously carried out by dry mixing (dry mixing) in a conical screw mixer. Technically and illustratively, it is a mixing screw that turns on itself to reassemble the product. It is attached to the end of an orbital arm which makes it describe the periphery of the cone. The operating principle of the conical mixer is preferably based on a mixture of crossed currents in a conical tank:

• Mixing by convection, ie moving groups from one place to another within a mass.

• Slip mixing, ie displacement of grain layers by sliding in different directions, within the pulverulent mass.

• The conical shape makes it possible to increase the speed of descent of the particles as the diameter of the tank shrinks.

The result of these simultaneous actions is very rapid mixing, very low energy consumption and very high mixing precision of Product S.

Examples of ingredient ranges of Product S (% weight) 35 to 65 Sodium percarbonate 5 to 20 Tetracetyl ethylene diamine 0.5 to 6 sodium sait of diethylene triamine penta (methylene phosphonic acid) - Dequest 4066® 25 to 40 Sodium sulfate 0.5 to 5 Talc

Product S is introduced into a preparation tank containing water at 45 ° C. until a product S solution of 120 g / 1 is obtained. Product L (see table below for the composition) is then added to the solution of Product S extracted from the preparation tank to be used as a decontaminating solution. The solution stability profile with this range of formulations has been found to be excellent and the pH of the decontaminating solution obtained remains close to 9.7.

Examples of ranges of ingredients in Product L (% by weight) 30 to 50 Dimethyl lauryl benzyl ammonium chloride (BTC 1218-50) - cationic surfactant 50% active in water 16 to 33 Simulsol SL-8 Alkyl polyglucoside Seppic - alkylpolyglycoside - 60% active in water 9 to 17 Synperonic 13 / 6,5 Ethoxylated fatty alcohol 6OE Uniqema - alkoxylated fatty alcohols 20 to 30 Dipropylene glycol monomethyl ether (Dowanol DPM) / Methoxy propoxy propanol - solvent

Claims (11)

1. Extemporaneous cleaning, disinfecting and decontaminating composition comprising a solid product comprising more than 35% by weight of peroxygenated compound, more than 20% by weight of sodium sulfate, and less than 5% by weight of surfactant, and a product liquid comprising between 8% and 32% by weight of cationic quaternary ammonium surfactant, between 15% and 40% by weight of a mixture of two different nonionic surfactants comprising at least one alkylpolyglycoside and an alkoxylated fatty alcohol, between 18 % and 40% by weight of water, and between 15% and 35% by weight of solvent. 2. Composition according to claim 1 characterized in that the peroxygen compound is a mixture of a peracetic acid precursor and a peroxidant. 3. Composition according to claim 2 characterized in that the precursor of peracetic acid is tetraacetylethylene diamine. 4. Composition according to any one of claims 2 and 3 characterized in that the peroxidant is sodium percarbonate. 5. Composition according to any one of the preceding claims, characterized in that the total concentration of peroxygen compound in the solid product is greater than 45% by weight. 6. Composition according to any one of the preceding claims, characterized in that the total concentration of sodium sulfate in the solid product is greater than 25% by weight. 7. Composition according to any one of the preceding claims, characterized in that the solid product comprises stabilizing and / or anti-redepositing and / or sequestering additives in a concentration greater than 0.5% by weight and less than 10% by weight . 8. Composition according to any one of the preceding claims, characterized in that the sum of the peroxygen compounds, sodium sulphate, surfactant and stabilizing and / or anti-redepositive and / or sequestering additives represents at least 95% by weight of the solid product . 9. Solid product comprising more than 35% by weight of peroxygen compound, more than 20% by weight of sodium sulphate, and less than 5% by weight of surfactant, the said solid product being able to be used as solid product of a composition according to any one of the preceding claims. 10. Use of the extemporaneous cleaning, disinfecting and decontaminating composition 5 according to any one of claims 1 to 8 comprising the following steps: dissolving the solid product, preferably in water, mixing the liquid product and the solution of the solid product, and using the mixture obtained as a cleaner, disinfectant and / or decontaminant. 11. Use of the extemporaneous cleaning, disinfecting and decontaminating composition according to any one of claims 1 to 8 for the decontamination, disinfection and / or cleaning of surfaces contaminated with toxic substances containing organophosphorus or organosulfur compounds.