A dry granular bleaching, detergent and whitening composition comprises by weight of the total composition (a) 0.5% to 35% of a chlorine compatible organic detergent compound selected from the group consisting of anionic, nonionic, amphoteric and zwitterionic organic detergent compounds, (b) 10 to 80% of sodium tripolyphosphate; (c) 2 to 50% of a chlorine bleaching compound which is dichloroisocyanuric acid or its sodium or potassium salts; (d) 0.01 to 1.0% of an optical whitener characterized by resistance to attack from active chlorine-containing compounds and (e) 8 to 40% of a strongly alkaline compound selected from trisodium phosphate, tripotassium phosphate, sodium carbonate, potassium carbonate, sodium silicate or potassium silicate, sufficient in amount to maintain an aqueous solution of the composition at pH 9 to 11. Chlorine-resistant optical whitening agents used are (1) dibenzothiophene dioxides of general formula <FORM:1045977/C4-C5/1> wherein RCO and R1CO are aromatic carboxylic acyl radicals, m and n are 0 or 1 and at least one of R and R1 contains a sulphonic radical when m and n are both zero; the compound <FORM:1045977/C4-C5/2> is specified; (2) benzimidazolyl stilbenes of general formula <FORM:1045977/C4-C5/3> wherein R1, R2 R3 and R4 are hydroge halogen, C1-C4 alkyl groups, C1-C4 alkoxy groups, and Y1 and Y2 are hydrogen, C1-C6 alkyl groups, hydroxy substituted alkyl containing 2 to 6 carbon atoms, 2-hydroxy-3-sulphopropyl, hydroxy-substituted oxaalkyl groups containing 3 to 15 carbon atoms, carboxy substituted alkyl groups containing 2-6 carbon atoms, cyano-alkyl groups containing 3 to 6 carbon atoms, allyl, methallyl, and monocyclic aralkyl groups containing 7 to 11 carbon atoms; the compound <FORM:1045977/C4-C5/4> wherein X is -CH2CHOHCH2OCH2CHOHCH2OH or -CH2CH2OCH2CH2OH is specified; (3) hydroxybenzimidazolyl stilbene carboxy esters of general formula <FORM:1045977/C4-C5/5> wherein R1, R2, R3 and R4 are hydrogen, halogen C1-C4 alkyl or alkoxy groups, Z1 is hydrogen, C1-C6 alkyl group, carboxy-substituted C2-C6 alkyl group, cyano substituted C3-C6 alkyl group, allyl, methallyl, monocyclic aralkyl containing 7-11 carbon atoms, acyloxy substituted C2-C6 alkyl group, 2-acyloxy-3-sulphopropyl, and acyloxy-substituted oxaalkyl wherein the oxaalkyl group contains 3-15 carbon atoms, Z2 is acyloxy-substituted alkyl, the alkyl group containing 2-6 carbon atoms, 2-acylox-3-sulphopropyl 2-6 carbon atoms, 2-acylox-3-sulphopropyl and acyloxy-substituted oxaalkyl wherein the oxaalkyl group contains 3 to 15 carbon atoms, said acyloxy groups in Z1 and Z2 being HOOC-A-COO, where A is the residue of an aromatic hydrocarbon 1,2-dicarboxylic acid or aromatic halohydrocarbon 1,2-dicarboxylic acid containing 8 to 20 carbon atoms, aliphatic hydrocarbon 1,2-dicarboxylic acid containing 4 to 22 carbon atoms and cycloaliphatic hydrocarbon 1,2-dicarboxylic acids containing 7-8 carbon atoms; (4) di-imidazoles of the general formula <FORM:1045977/C4-C5/6> wherein A is a radical of the benzene series in which two vicinal carbon atoms are bound to nitrogen atoms of the imidazole ring and X is the nitrogen atom of a tertiary amino group, the substituent being an alkyl or hydroxyalkyl group containing up to 6 carbon atoms, the compound <FORM:1045977/C4-C5/7> is specified; (5) 2-stilbyl-monotriazoles of general formula <FORM:1045977/C4-C5/8> wherein A is a naphthalene radical, two vicinal carbon atoms thereof forming part of the 1,2,3-triazole ring, R1 is H, CN, COOH or SO2X; R2 is H, halogen, alkyl or alkoxy containing up to 6 carbon atoms, or SO2X, R3 is H, halogen, alkyl or alkoxy containing up to 6 carbon atoms, phenyl, phenoxy, CN, or SO2X, R4 is H, SO2X, CN or alkoxy containing up to 6 carbon atoms; X is hydroxy, alkyl containing up to 6 carbon atoms, phenylamino, alkylamino, acylamino and phenoxy, at least one of R1, R2 or R3 being an anionic substituent, there being 1 to 3 salt-forming groups having an acid reaction in water, the compound <FORM:1045977/C4-C5/9> is specified. Detergents used include (a) alkali metal soaps, C10-C18 alkyl sulphates, alkyl benzene sulphonates, sodium alkyl glyceryl ether sulphonates, fatty acid monoglyceride sulphates and sulphonates, sulphuric acid esters of reaction products of higher fatty alcohols and ethylene oxide; salts of alkylphenol ethylene oxide ether sulphates, salts of fatty acids esterified with isothionic acids; (b) reaction products of ethylene oxide and adducts of propylene oxide and propylene glycol, polyethylene oxide condensates of alkyl phenols, reaction products of ethylene oxide and adducts of propylene oxide and ethylene diamine, condensation products of C8-C18 aliphatic alcohols with ethylene oxide, trialkyl amine oxides and trialkyl phosphine oxides, zwitterionic detergents, e.g. betaines and amphoteric and ampholytic detergents, e.g. dodecyl-beta-alanine and N-alkyl taurines. 0.05 to 5.0% of ultramarine blue may also be added. The composition may be packaged in water-soluble sachets or compressed into tablets. Other additives include perfume, sodium carboxymethyl cellulose, anti-tarnishing agents, antiredeposition agents, bacteriocides, dyes and sequestering agents. The compositions may contain up to 10% by weight of water.ALSO:A dry granular bleaching, detergent and whitening composition comprises by weight of the total composition (a) 0.5% to 35% of a chlorine compatible organic detergent compound selected from the group consisting of anionic, nonionic, amphoteric and zwiterionic organic detergent compounds (b) 10% to 80% of sodium tripolyphosphate (c) 2% to 50% of a chlorine bleaching compound which is dichloroisocyanuric acid or its sodium or potassium salts, (d) 0.01% to 1.0% of an optical whitener characterized by resistance to attack from active chlorine-containing compounds and (e) 8% to 40% of a strongly alkaline compound selected from trisodium phosphate, tripotassium phosphate, sodium carbonate, potassium carbonate, sodium silicate or potassium silicate, sufficient in amount to maintain an aqueous solution of the composition at pH 9 to 11. Chlorine-resistant optical whitening agents used are (i) dibenzothiophene dioxides of general formula <FORM:1045977/D1-D2/1> wherein RCO and R1CO are aromatic carboxylic acyl radicals, m and n are 0 or 1 and at least one of R and R1 contains a sulphonic radical when m and n are both zero; the compound <FORM:1045977/D1-D2/2> is specified; (2) benzimid-azolyl stilbenes of general formula <FORM:1045977/D1-D2/3> wherein R1, R2, R3 and R4 are hydrogen, halogen, C1-C4 alkyl groups, C1-C4 alkoxy groups, and Y1 and Y2 are hydrogen, C1-C6 alkyl groups, hydroxy substituted alkyl containing 2 to 6 carbon atoms 2-hydroxy-3-sulphopropyl hydroxy-substituted oxa alkyl groups containing 3 to 15 carbon atoms, carboxy substituted alkyl groups containing 2-6 carbon atoms, cyano-alkyl groups containing 3 to 6 carbon atoms, allyl, methallyl, and monocyclic aralkyl groups containing 7 to 11 carbon atoms; the compound <FORM:1045977/D1-D2/4> wherein x is -CH2CHOHCH2OCH2CHOHCH2OH or N-CH2CH2OCH2CH2OH is specified (3) hydroxybenzimid azolyl stilbene carboxy-esters of general formula <FORM:1045977/D1-D2/5> wherein R1, R2, R3 and R4 are hydrogen, halogen, C1-C4 alkyl or alkoxy groups, Z1 is hydrogen, C1-C6 alkyl group, carboxy-substituted C2-C6 alkyl group, cyano substituted C3-C6 alkyl group, allyl, methallyl, monocyclic aralkyl containing 7-11 carbon atoms, acyloxy substituted C2-C6 alkyl group, 2 acyloxy-3-sulphopropyl, and acyloxy-substituted oxaalkyl wherein the oxaalkyl group contains 3-15 carbon atoms; Z2 is acyloxy-substituted alkyl the alkyl group containing 2-6 carbon atoms, 2-acyloxy 3 sulphopropyl and acyloxy-substituted oxaalkyl wherein the oxaalkyl group contains 3 to 15 carbon atoms, said acyloxy groups in Z1 and Z2 being HOOC-ACOO where A is the residue of an aromatic hydrocarbon 1, 2 dicarboxylic acid or aromatic halohydrocarbon 1, 2 dicarboxylic acid containing 8 to 20 carbon atoms, aliphatic hydrocarbon 1, 2 dicarboxylic acid containing 4 to 22 carbon atoms and cycloaliphatic hydrocarbon 1, 2 dicarboxylic acids containing 7-8 carbon atoms; (4) di-imizoles of the general formula <FORM:1045977/D1-D2/6> wherein A is a radical of the benzene series in which tow vicinal carbon atoms are bound to nitrogen atoms of the imidazole ring and X is the nitrogen atom of a tertiary amino group, the substituent being an alkyl or hydroxyalkyl group containing up to 6 carbon atoms, the compound <FORM:1045977/D1-D2/7> (5) 2-stilbyl-monotriazoles of general formula <FORM:1045977/D1-D2/8> wherein A is a naphthalene radical, two vicinal carbon atoms thereof forming part of the 1, 2, 3, - triazole ring R, is H, CH, COOH or SO2X; R2 is H, halogen, alkyl or alkoxy containing up to 6 carbon atoms, or SO2X, R3 is H, halogen, alkyl or alkoxy containing up to 6 carbon atoms, phenyl, phenoxy, CN or SO2X, R4 is H, SO2X, CN or alkoxy containing up to 6 carbon atoms; X is hydroxy, alkyl containing up to 6 carbon atoms, phenylamino, alkylamino, acylamino and phenoxy, at least one of R1, R2 or R3 being an anionic substituent there being 1 to 3 salt-forming groups having an acid reaction in water, the compound <FORM:1045977/D1-D2/9> is specified. Detergents used include (a) alkali metal soaps, C10-C18 alkyl sulphates, alkyl benzene sulphonates, sodium alkyl glyceryl ether sulphonates, fatty acid monoglyceride sulphates and sulphonates, sulphuric acid esters of reaction products of higher fatty alcohols and ethylene oxide, salts of alkyl phenol ethylene oxide ether su sulphates, salts of fatty acids esterified with isothionic acids; (b) reaction products of ethylene oxide and aducts of propylene oxide and propylene glycol, polyethylene oxide condensates of alkyl phenols, reaction products of ethylene oxide and aducts of propylene oxide and ethylene diamine, condensation products of