120-98-9 Usage
General Description
5-Amino-4-hydroxybenzene-1,3-disulphonic acid is a chemical compound also known as 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid. It is a synthetic dye intermediate commonly used in the production of azo dyes, which are widely used in the textile and paper industries. 5-Amino-4-hydroxybenzene-1,3-disulphonic acid is derived from the condensation of 1,3-dichloro-4,6-dinitrobenzene with aniline, followed by reduction to the corresponding 4,6-diaminonitroso compound and subsequent diazotization with nitrous acid. It is a water-soluble compound that can be used as a dye, a pH indicator, and in the manufacturing of various chemical products. Due to its potential harmful effects, it is important to handle this chemical with care and according to safety guidelines.
Check Digit Verification of cas no
The CAS Registry Mumber 120-98-9 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 1,2 and 0 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 120-98:
(5*1)+(4*2)+(3*0)+(2*9)+(1*8)=39
39 % 10 = 9
So 120-98-9 is a valid CAS Registry Number.
InChI:InChI=1/C6H7NO7S2.K/c7-4-1-3(15(9,10)11)2-5(6(4)8)16(12,13)14;/h1-2,8H,7H2,(H,9,10,11)(H,12,13,14);/q;+1/p-1
120-98-9Relevant articles and documents
Reactive dyestuffs comprising a triazine moiety and a vinylsulfonyl moiety both being linked by a substituted alkylene bridge member
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, (2008/06/13)
A reactive dye of the formula STR1 in which: F is a radical selected from the group consisting of metal-free or metal-containing monoazo or disazo dyes containing at least one --SO3 H group, anthraquinone dyes, sulfophthalocyanine dyes, formazan dyes, phenazine dyes, oxazine dyes and nitroaryl dyes, R is hydrogen, C1 -C4 alkyl which is unsubstituted or substituted with --COOH or --SO3 H, cyanoethyl, or hydroxyethyl, X is fluorine, chlorine, bromine, --SO3 H, phenylsulfonyl or C1 -C4 -alkylsulfonyl, p is 1 or 2 and A is a radical of the formula STR2 in which: Y is chlorine, bromine, fluorine, --OH, --OSO3 H, --O-acyl, --CN, --COOH, --COO--C1 -C4 -alkyl, --CONH2 or --SO2 --Z, the group designated "alk" is a straight or branched polymethylene radical having 2 to 6 carbon atoms, V is STR3 hydrogen or C1 -C4 -alkyl which is unsubstituted or substituted by C1 -C2 -alkoxy, carboxyl, sulfo, halogen or hydroxy, Z is β-halogenoethyl, vinyl or β-acetoxyethyl, or A is a radical of the formulae STR4 in all of which R' is C1-6 -alkyl or hydrogen, Z is as defined above, o is 0 to 6, and m is 2 to 6.
