JP2017219408A - Indicator for determining sweat smell - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indicator that enables a sweat smell to be objectively and quantitatively determined, a sweat smell determination method using the same, and an artificial sweat smell composition suitable for evaluation of, e.g., sweat smell masking effect.SOLUTION: An indicator for determining a sweat smell of a textile product contains at least one selected from the group consisting of carboxylic acids represented by general formula (1), where the broken line indicates that the bonds may be double bonds, and carboxylic acid derivatives obtained by introducing atoms or atomic groups into the carboxy groups of the carboxylic acids. A method of determining a sweat smell of a textile product uses the carboxylic acids or derivatives thereof as an indicator. An artificial sweat smell composition contains the carboxylic acids.SELECTED DRAWING: None

Description

  The present invention relates to an indicator substance used for determination of sweat odor generated from a textile product, a method for determining sweat odor using the same, and a pseudo sweat odor composition.

  In recent years, due to increasing consumer interest in the living environment, an increasing number of people are concerned about unpleasant odors around them, such as body odors generated by people and odors generated from textiles such as clothes during work or commuting. In particular, an odor generated from a textile product such as clothing at the time of wearing is recognized as an unpleasant odor as a so-called “sweat odor at the time of wearing”. Conventionally, it has been considered that the contribution of a plurality of short-chain and medium-chain fatty acid odors is large as a human sweat odor. For example, Non-Patent Document 1 describes that the main odor component of sweat odor is isovaleric acid, and in addition, a fatty acid having 2 to 6 carbon atoms is used as a synthetic odor.

  In addition, as an odor component in which a plurality of short-chain and medium-chain fatty acid odors are involved, an unpleasant odor that is likely to occur when the textiles such as clothes, towels, and bedding are left to dry for a long time. There is a certain “raw odor”. This freshly-dried odor (room-dried odor) is a “smell-like odor” such as medium-chain aldehydes, medium-chain alcohols, and ketones, a “sour odor” such as short-chain fatty acids and medium-chain fatty acids, and a “raw odor” such as nitrogen compounds. In addition, it is reported that the contribution of medium chain fatty acids is large (Non-patent Document 2). Here, it is presumed that the main component of the raw dry odor is “a mixture of fatty acids including branched / unsaturated carbon atoms of 7 to 9”, and these are also included in odors such as sweat. That is, neither Non-Patent Document 1 nor Non-Patent Document 2 suggests the existence of a component peculiar to sweat odor generated from a textile product at the time of wearing.

  On the other hand, in Patent Documents 1 and 2, three types of methylhexene such as 4-methyl-3-hexenoic acid are used as causative substances of an unpleasant odor (raw dry odor) that occurs when the textiles after washing are insufficiently dried. The acid is disclosed as a highly contributing substance.

Kiyohito Sawano, “What is body odor”, Fragrance, June 1994, No.182, pp.123-128 Sugawara, Sonoda, “Detergents that Control Room Drying Odors”, Fragrance, September 2004, No.223, p.109-116

JP 2009-244094 JP 2011-75385 A

  However, none of the documents describes a component unique to sweat odor generated from a textile product when worn. Conventionally, as the evaluation method of the sweat odor generated from the textile product and the effectiveness evaluation of the treatment agent product for the textile product that prevents the generation of the sweat odor, it is assumed that the odor at the time of wearing and the odor after wearing are the same, It relied on a sensory evaluation test to determine the smell of clothing after wearing. Further, in the sensory evaluation test, there is a large room for the evaluator's subjective judgment, so that there is a problem that quantitative judgment is difficult and objectivity is lacking.

  The present invention provides an indicator substance that enables objective and quantitative determination of sweat odor generated from a textile product when worn, a sweat odor judgment method for a textile product using the same, and sweat odor masking effect, etc. The present invention relates to a simulated raw dry odor composition suitable for the evaluation of the above.

  The present inventors have studied the causative component of clothing having sweat odor generated from clothing at the time of wearing. As a result, methylpentenoic acid and methylpentanoic acid having a specific structure have a large contribution to sweat odor and are quantitative. It has been found that a group of compounds having a structure close to those compounds can be used as an objective index for quantitatively determining the degree of sweat odor.

  The present invention provides a textile product comprising at least one selected from the group consisting of a carboxylic acid represented by the general formula (1) and a carboxylic acid derivative obtained by introducing an atom or an atomic group into the carboxy group of the carboxylic acid. It provides an index substance for determining sweat odor.

[In the formula, a broken line indicates that it may be a double bond. ]

  Moreover, this invention provides the sweat odor determination method of the textiles which uses the said carboxylic acid or its derivative (s) as a parameter | index.

  Furthermore, the present invention provides a pseudo sweat odor composition containing the carboxylic acid.

  The carboxylic acid represented by the general formula (1) has an odor very close to the smell of sweat of the textile product when worn, and is useful as an index substance for determining the sweat odor of the textile product. Therefore, the strength of sweat odor of the textile product can be objectively and quantitatively evaluated based on the amount of the compound.

  The sweat odor determination indicator substance of the present invention is obtained by introducing an atom or an atomic group into the carboxylic acid represented by the general formula (1) (hereinafter referred to as carboxylic acid (1)) and the carboxy group of the carboxylic acid. It contains at least one selected from the group consisting of carboxylic acid derivatives.

  The causative substance of sweat odor in the textile product when worn by the present inventors, among the compounds included in the carboxylic acid (1), 4-methyl-3-pentenoic acid represented by the following formula (1a) (Hereinafter referred to as 4M3P) and 4-methylpentanoic acid (hereinafter referred to as 4MP) represented by the following formula (1b), both of which have an odor very close to the sweat odor emitted from the textile product when worn.

  4M3P (1a) is a compound known as an intermediate of industrial raw materials [US3082251A], and 4MP (1b) is a compound used as a flavor component. It has never been reported. Moreover, since it has the characteristic shown below, it is thought that the abundance and the presence state in the clothing which has a sweat odor show the grade of the sweat odor at the time of wear.

(I) Clothing that does not detect 4M3P and 4MP does not generate sweat odor, while clothing that detects 4M3P and 4MP has obvious sweat odor. That is, the above two compounds exist specifically in the sweat odor of clothing when worn.
(B) Clothing that contains more 4M3P and 4MP in clothing has a stronger sweat odor.

  Carboxylic acid (1) includes, in addition to the above 4M3P and 4MP, compounds very similar in chemical structure. Specific examples of the carboxylic acid (1) other than 4M3P and 4MP include 4-methyl-2-pentenoic acid and 4-methyl-4-pentenoic acid.

  Since the carboxylic acid (1) can be synthesized by a known method and can be purchased as a reagent, it is possible to objectively evaluate sweat odors regardless of time and place by stably supplying a synthetic product of a certain quality. It is also suitable as an indicator substance because it can be determined.

  The carboxylic acid (1) may be a simple substance or a mixture composed of a plurality of carboxylic acids (1). Moreover, although the purity is so preferable that it is high, as long as the odor is not affected, it may contain impurities.

  The carboxylic acid (1) may be used after chemical modification, that is, by introducing an atom or an atomic group into the carboxy group, as long as the detection function as an indicator compound is not lost. For example, to improve analytical sensitivity in instrumental analysis, acylation, esterification, trimethylsilylation, amidation, carboxylation of the carboxy group, or coloration of the carboxy group to enable visualization of the indicator substance You can also introduce teams.

  Derivatizing reagents include UV reagents such as O- (p-nitrobenzyl) -N, N-diisopropylisourea (PNBDI) and p-bromophenacyl bromide (PBPB), 4-bromomethyl-7-methoxycoumarin ( Br-MmC) and other fluorescent reagents, silylating agents such as N-trimethylsilylimidazole (TMSI) and N, O-bis (trimethylsilyl) acetamide (BSA), acylating agents such as trifluoroacetic anhydride and trifluoroacetylimidazole, etc. Can be used.

  When a chromophore in the visible region is used as the labeling compound for carboxylic acid (1), a concentration-coloring standard sample of the labeling compound is prepared, and the odorant extract collected from the sample is colored with the same reagent. It is also possible to judge the degree of sweat odor visually.

As a method of determining the presence or amount of carboxylic acid (1) using a color reaction,
i) Method of introducing a chromophore directly into the carboxy group of carboxylic acid (1)
ii) Method of introducing a chromophore into the derivative after converting the carboxylic acid (1) into the derivative
iii) A method of introducing a chromophore into the decomposed product after decomposing the carboxylic acid (1).

  As a color reagent used in the method of i) for introducing a chromophore directly into the carboxy group of the carboxylic acid (1), a reagent that introduces a carboxylic acid into a chromogenic acid hydrazide in the presence of a condensing agent to cause coloration; There are a reagent for introducing a carboxylic acid into a chromogenic ester to cause coloration, a reagent for introducing a carboxylic acid into a chromogenic amide for coloring, and the like.

  Reagents that lead carboxylic acid to chromogenic acid hydrazide for coloration include 2-nitrophenylhydrazine, 6,7-dimethoxy-1-methyl-2 (1H) -quinoxalinone-3-propionylcarboxylic acid hydrazide (DMEQ- H), p- (4,5-diphenyl-1H-imidazol-2-yl) -benzohydrazide, p- (1-methyl-1H-phenanthro- [9,10-imidazol-2-yl) -benzohydrazide, and p- (5,6-dimethoxy-2-benzothiazoyl) -benzohydrazide.

  Reagents for introducing a carboxylic acid into a chromogenic ester to cause coloration include 9-anthryldiazomethane, 1-naphthyldiazomethane, 1- (2-naphthyl) diazoethane, 1-pyrenyldiazomethane, 4-diazomethyl-7-methoxy. Coumarin, 4-bromomethyl-7-methoxycoumarin, 3-bromomethyl-6,7-dimethoxy-1-methyl-2 (1H) -quinoxalinone, 9-bromomethylacridine, 4-bromomethyl-6,7-methylenedioxycoumarin N- (9-acridinyl) -bromoacetamide, 2- (2,3-naphthylimino) ethyl trifluoromethanesulfonate, 2- (phthalimino) ethyl trifluoromethanesulfonate, N-chloromethylphthalimide, N-chloromethyl-4-nitro Examples include phthalimide, N-chloromethyl isatin, o- (p-nitrobenzyl) -N, N′-diisopropylisourea and the like.

  Examples of the reagent that introduces a carboxylic acid into a chromogenic amide to cause coloration include monodansylcadaverine, 2- (p-aminomethylphenyl) -N, N′-dimethyl-2H-benzotriazol-5-amine, and the like. .

  In the method of converting the carboxylic acid of ii) to a derivative and then introducing a chromophore into the derivative, examples of the carboxylic acid derivative that can be used for the color reaction include inorganic salts and acid chlorides.

  Carboxylic acid inorganic salts can be reacted with aromatic halogens to give chromogenic esters and acid chlorides to chromogenic amides. Examples of the method for converting the carboxylic acid into an inorganic salt include a method in which the carboxylic acid is mixed with an alkaline substance such as a sodium hydrogen carbonate solution, a sodium carbonate solution, a sodium hydroxide solution, a potassium hydroxide solution and neutralized. Aromatic halogens that can be converted to chromogenic esters by reacting with inorganic salts of hydroxycarboxylic acids include p-nitrobenzyl bromide, phenacyl bromide, p-chlorophenacyl bromide, p-bromophenacyl bromide, p-iodo Examples include phenacyl bromide, p-nitrophenacyl bromide, p-phenylphenacyl bromide, p-phenylazophenacyl bromide, N, N'-dimethyl-p-aminobenzeneazophenacyl chloride.

  Examples of the method for converting carboxylic acid to acid chloride include a method of reacting carboxylic acid with oxalyl chloride. Examples of the method for converting the acid chloride to a color-forming amide include a method of reacting with 9-aminophenanthrene in the presence of triethylamine.

  After degrading the carboxylic acid of iii), a chromophore can be introduced into the degradation product by acyl-CoA synthetase in the presence of adenosine triphosphate (ATP) and coenzyme CoA in the carboxylic acid. To produce acyl-CoA, then treated with acyl-CoA oxidase to produce enoyl-CoA and hydrogen peroxide, which is further treated with catalase to formaldehyde. There is a method in which a color reagent, 4-amino-3-hydrazino-5-mercapto-1,2,3-triazole (AHMT), is reacted to colorize the resulting purple color.

  Thus, in the present invention, the reagent used for the color reaction of the carboxylic acid is not particularly limited as long as it reacts with any of carboxylic acid, a carboxylic acid derivative, and a carboxylic acid decomposition product to develop a color. In other words, the sweat odor judging reagent that colors carboxylic acid (1) can reliably and quickly judge the degree of sweat odor without using expensive analytical instruments such as gas chromatography and liquid chromatography. Since it is possible, it can be used when determining in an environment where there is no special analytical instrument.

  In the present invention, it is possible to quantitatively determine the degree of sweat odor in the textile product using these indicator substances.

  As a method of using carboxylic acid (1) or a derivative thereof as an index substance for determining sweat odor, for example, when measuring by GC-MS, calibration is performed using carboxylic acid (1) or a derivative thereof as a standard substance (standard). A line is prepared, and the calibration curve is used to identify the peak of carboxylic acid (1) contained in the collected clothing and measure the amount.

  When performing sensory evaluation, prepare odor standard samples of various concentrations by diluting carboxylic acid (1) in several stages, and check the odor of the evaluation sample prepared from clothing with sweat odor against the standard sample. The amount of carboxylic acid (1) contained in clothing may be determined by sensory evaluation. In this way, the degree of sweat odor of clothing is determined by quantitatively using odors or parameters other than odors.

  In addition, when the amount of carboxylic acid (1) produced in clothing is large but it has no odor such as salt or has changed to a weak derivative, a sweat odor latent state exists, In some cases, the sensory evaluation cannot accurately evaluate the latent state of sweat odor. On the other hand, in the present invention, by measuring the carboxylic acid (1) or a derivative thereof that can be analyzed by a necessary chemical treatment, whether the evaluation sample is a sample that may generate a sweat odor, that is, Potential evaluation can be performed.

  As described above, the index substance of the present invention can be used for any of chemical analysis, instrumental analysis, sensory evaluation, etc. and can be quantitatively determined with high objectivity. By expressing the value as the abundance of carboxylic acid (1), it is possible to exclude subjectivity from the determination result.

  Furthermore, in the present invention, the effectiveness of the treatment product for textile products targeting sweat odor can be objectively and quantitatively determined using an indicator substance containing carboxylic acid (1) or a derivative thereof. .

  In the method for determining the effectiveness of a treatment product for textile products, the indicator substance is used as a simple substance, or other components such as a solvent for dissolution or dilution, a stabilizer, an antibacterial agent, an antibacterial agent, Additives such as surfactants, antioxidants, fragrances, plant extracts and the like can be blended and used in preparations for practical use such as storage and use in judgment tests.

  Examples of treatment agents for textile products that target sweaty odors include treatment agents that suppress the decomposition of sweat, sebum, etc. remaining in clothing by sterilizing bacteria attached to clothing, and decompose into odorless derivatives. Or the processing agent which has effects, such as the processing agent to change or the processing agent which masks odor, is mentioned. In order to use the carboxylic acid (1) or a derivative thereof as an index substance for determining the effectiveness of a fiber product treating agent product, the carboxylic acid (1) may be used in conformity with the action mechanism and evaluation method of the fiber product treating agent product.

  Specifically, a carboxylic acid (1) or a derivative thereof, preferably 4M3P, 4MP or a derivative thereof as an active ingredient is attached to a fiber such as clothing, and a predetermined amount of the fiber product is treated. By adding the agent sample and quantifying the change state of the indicator substance by an appropriate method, the effectiveness of the treatment agent sample for textile products can be objectively and quantitatively determined.

  As a specific example of the method for quantifying the change state of the indicator substance, in the case of a fiber product treatment sample that decomposes or induces carboxylic acid (1) into another compound to reduce odor, a calibration curve of the indicator substance is previously set. It is prepared and an instrumental analysis is performed using this calibration curve, or a changed or unchanged substance of the indicator substance is quantified by chemical analysis such as titration or extraction. In the case of a textile treatment agent sample that masks sweat odor, prepare an odor standard sample of each concentration by diluting the indicator substance in several stages, and then add the odor of the indicator substance to which the textile agent treatment sample is added. The masking effect is judged by sensory evaluation against a standard sample.

  Furthermore, the present invention provides a pseudo sweat odor composition which contains carboxylic acid (1) and can be used for deodorizing sweat odor and evaluating the masking effect. By using this pseudo sweat odor composition, the screening of a deodorant base and the deodorant effect of the sweat odor of the deodorant composition can be evaluated accurately and with good reproducibility.

  When this carboxylic acid (1) is used for determination of sweat odor in sensory evaluation or the like, sweat odor closer to the actual situation can be reproduced by mixing known sweat odor components at a predetermined ratio. That is, the simulated raw dry odor composition of the present invention contains carboxylic acid (1) as component (A), and can appropriately contain the compounds of components (B) and (C) shown below. Component (A) preferably contains at least one of 4M3P and 4MP. The content of the component (A) in the pseudo sweat odor composition is preferably 0.5% by mass or more, more preferably 1% by mass or more, and preferably 60% by mass or less, more preferably 56% by mass or less. is there.

  Component (B) is a lower fatty acid having 2 to 5 carbon chains, and by adding these compounds to the composition, a sweat-like sour odor is imparted, which is closer to the sweat odor generated from the fiber product when worn. be able to. Examples of the component (B) include acetic acid, propionic acid, butyric acid, 2-methylbutyric acid, valeric acid, and isovaleric acid, and any of these can be used alone or in combination of two or more. The content of the component (B) in the pseudo sweat odor composition is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and preferably 60% by mass or less, more preferably 55% by mass or less. is there.

  In the present invention, the mass ratio (B) / (A) of the component (B) to the component (A) is preferably 0.005 or more, more preferably 0.01 or more, and preferably 50 or less, more preferably 25 or less. It is.

  Component (C) is a saturated or unsaturated methyl-branched fatty acid having 7 carbon atoms, and by adding these compounds to the composition, a specific sweat-like odor generated from the textile product at the time of wearing is imparted. It can be brought closer to the sweat odor that is emitted when wearing. Examples of the component (C) include 4-methyl-3-hexenoic acid (4M3H), 4-methylhexanoic acid (4MH), 5-methyl-2-hexenoic acid (5M2H), 5-methyl-4-hexenoic acid ( 5M4H) and the like, and any of them can be used alone or in combination of two or more. The content of the component (C) in the pseudo sweat odor composition is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, and preferably 15% by mass or less, more preferably 10% by mass or less. is there.

  In the present invention, the mass ratio (C) / (A) of the component (C) to the component (A) is preferably 0.001 or more, more preferably 0.01 or more, and preferably 10 or less.

  Further, the pseudo sweat odor composition of the present invention further contains, as component (D), a straight chain saturated fatty acid having 6 to 12 carbon chains detected from human sebum or sweat, and has a sweetness peculiar to human odors. It is preferable because it can give an acid odor like a stagnation, and can be made closer to a sweat odor generated from a textile product when worn. Component (D) is selected from hexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, undecanoic acid and dodecanoic acid, and any one of them can be used alone or in combination of two or more. The content of component (D) in the pseudo sweat odor composition is preferably 0.5% by mass or more, more preferably 5% by mass or more, and preferably 70% by mass or less, more preferably 60% by mass or less. is there.

  The mass ratio (D) / (A) of the component (D) to the component (A) is preferably 0.01 or more, more preferably 0.1 or more, and preferably 100 or less, more preferably 50 or less.

  The pseudo sweat odor composition of the present invention comprises compounds other than components (A) to (D), such as compounds derived from mold odor such as pyrazines, pyridines, dimethyl disulfide, dimethyl trisulfide, myristic acid, palmitic acid, palmitoyl. By containing higher fatty acids such as acid, stearic acid, oleic acid and linoleic acid, it can be made closer to the actual sweat odor.

  Further, the simulated sweat odor composition of the present invention contains a diluent such as water, diethyl phthalate, dipropylene glycol, propylene glycol, triethyl citrate, butyl diglycol or a solvent such as ethanol, if necessary. Can be made. The amount can be appropriately determined according to the intended use and intended purpose of the simulated sweat odor composition of the present invention.

  Further, the pseudo sweat odor composition of the present invention can be used for the evaluation of the sweat odor strength of a textile product in the same manner as when the carboxylic acid (1) as the indicator substance is used. For example, the simulated sweat odor composition is diluted in several stages to prepare odor standard samples of each concentration, and the odor of the evaluation sample prepared from clothing with sweat odor is checked against the standard sample, and the strength of the odor attached to the clothing Can be quantitatively measured by sensory evaluation. In addition, these compositions can be used to clean deodorants, deodorants for nursing odors, indoor deodorants, clothing cleaners, clothing deodorants, residential cleaners, etc. It may be applied to the development of agents.

Test example 1
10 g of clothing with sweaty odor was cut into fine pieces, soaked in 30 mL of diethyl ether, and sonicated for about 15 minutes to obtain an odor component extract. After the odor component extract was filtered and filtered (0.4 micron pore), 10 mL of 1N NaOH aqueous solution was added and stirred well. After the stationary separation layer, the upper diethyl ether layer was removed, and 10 mL of fresh diethyl ether was added to the remaining lower layer (aqueous layer) and stirred well. After the stationary separation layer, the upper diethyl ether layer was removed. After 3 mL of diethyl ether was added to the lower layer (aqueous layer), the mixture was neutralized by adding hydrochloric acid, and the upper layer (including diethyl ether / free fatty acid) was filtered (0.2 micron pore) to obtain a sample for analysis.
The sample for analysis was subjected to smell sniffing GC, and the GC retention time (RT: Retention time) of the component having sweat-like odor was specified. Subsequently, the sample for analysis was analyzed with a device in which a mass injection unit (CIS4) manufactured by GERSTEL was connected to GC-MS manufactured by Agilent, and components having sweat-like odor were analyzed. Each analysis condition is shown.

Smell GC conditions
GC: Agilent 6890N
Column DB-1 (trade name, manufactured by Agilent), length 30 m, inner diameter 530 μm, film thickness 1.0 μm
40 ℃ -2 ℃ / min-280 ℃ （30min.）
Mass injection unit (CIS4) conditions:
After injecting 50 μL of sample, vent the solvent at 0 ° C, then inject at 180 ° C
GC-MS conditions:
GC: Agilent 6890N (trade name, manufactured by Agilent)
MS: Agilent 5975 (trade name, manufactured by Agilent)
TDS desorption conditions: 250 ° C, purge flow rate 50mL / min, purge time 3min.
Column: DB-1 (trade name, manufactured by Agilent), length 60 m, inner diameter 250 μm, film thickness 0.25 μm
30 ℃ (6min.)-10 ℃ / min-60 ℃ -5 ℃ / min-95 ℃ -3 ℃ / min-300 ℃

As a result of the analysis, two types of carboxylic acids, 4M3P and 4MP, were identified as components with characteristic sweaty odor. Each compound was identified by separately comparing a standard product purchased as a reagent with a GC retention time and a detected mass fragment ion (m / z (+)) of the component. The m / z (+) of the two carboxylic acids is as follows.
4-methyl-3-pentenoic acid (4M3H) m / z (+): 41 (82), 42 (8), 43 (10), 45 (7), 53 (14), 55 (13), 67 (11), 68 (16), 69 (100), 81 (3), 96 (7), 114 (48)
4-methylpentanoic acid (4MP) m / z (+): 41 (45), 42 (11), 43 (45), 45 (14), 55 (53), 56 (16), 57 (100) , 59 (15), 60 (30), 73 (63), 74 (64), 83 (20), 87 (7), 101 (5), 115 (0.32), 116 (0.03)

  A sensory evaluation by a professional evaluator was performed on the odor of each compound. The results are shown in Table 1.

Examples 1-7, Comparative Example 1
The pseudo sweat odor composition shown in Table 2 was prepared, and sensory evaluation was performed based on the following evaluation method. The content of each component in Table 2 is mass%.
(Evaluation method)
Each simulated sweat odor composition was diluted 1000 times with ion-exchanged water in a 5 x 5 cm unused towel (made of cotton) in a room maintained at room temperature (25 ° C) and humidity of 65%. 0.1 mL was applied. About how close the smell of this towel is to the sweaty odor, 10 expert evaluations (10: very sweaty odor-1: not the smell of sweaty odor) are performed by 4 expert evaluators, The average value is shown in Table 2.

Claims (7)

A sweat odor determination of a textile product containing at least one selected from the group consisting of a carboxylic acid represented by the general formula (1) and a carboxylic acid derivative obtained by introducing an atom or an atomic group into the carboxy group of the carboxylic acid Indicator substances for use.

[In the formula, a broken line indicates that it may be a double bond. ]   A method for determining a sweat odor of a textile product using the carboxylic acid or derivative thereof according to claim 1 as an index.   A method for evaluating the sweat odor of a textile product, wherein the odor standard sample obtained by diluting the carboxylic acid according to claim 1 in several stages is compared with the odor of clothing having a sweat odor, and the strength of the sweat odor is evaluated. A simulated sweat odor composition containing the following component (A):
(A) Carboxylic acid represented by the general formula (1)

[In the formula, a broken line indicates that it may be a double bond. ] Furthermore, the pseudo sweat odor composition of Claim 4 containing the following component (B) and (C).
(B) C2-C5 lower fatty acid
(C) C7 saturated or unsaturated methyl branched fatty acid   Component (A) content is 0.5 mass% to 60 mass%, Component (B) content is 0.5 mass% to 60 mass%, Component (C) content is 0.01 mass% to 15 mass% The simulated sweat odor composition according to claim 5. Furthermore, the pseudo sweat odor composition of any one of Claims 4-6 containing the following component (D).
(D) C6-C12 linear saturated fatty acid