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83757-40-8

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83757-40-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 83757-40-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,3,7,5 and 7 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 83757-40:
(7*8)+(6*3)+(5*7)+(4*5)+(3*7)+(2*4)+(1*0)=158
158 % 10 = 8
So 83757-40-8 is a valid CAS Registry Number.

83757-40-8Relevant articles and documents

Dyeing compositions for keratin fibres, based on 3-nitro-ortho-phenylenediamines, and certain 3-nitro-ortho-phenylenediamines used therein

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, (2008/06/13)

The invention provides dyeing compositions for keratin fibres, which contain at least one dyestuff corresponding to the formula: STR1 in which R1 and R2 independently of one another denote a hydrogen atom, an alkyl group, a monohydroxyalkyl or polyhydroxyalkyl group, an alkyl group substituted by an alkoxy group, or an aminoalkyl group of which the amino group can optionally be monosubstituted or disubstituted by an alkyl group, and the radical R2 can also denote a phenyl group or a phenyl group substituted by an alkyl, hydroxyl or amino group, and Z denotes a hydrogen atom or an alkyl group, or their cosmetically acceptable salts. Many of the dyestuffs are novel.

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