4815-31-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 4815-31-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,8,1 and 5 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 4815-31:
(6*4)+(5*8)+(4*1)+(3*5)+(2*3)+(1*1)=90
90 % 10 = 0
So 4815-31-0 is a valid CAS Registry Number.
4815-31-0Relevant articles and documents
Azo dyes
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Page/Page column 6, (2010/04/25)
The azo dyes relate to thiophene azo dyes of the general formula: where R1 is Cyano or C1-C5 alkoxy carbonyl; R2 is hydrogen, halogene, C1-C2 alkyl, phenyl, or substituted phenyl; and R3 is C1-C5 alkoxy carbonyl, C1-C4 alkanoyl, benzoyl, phenyl, alkyl substituted phenyl, or alkoxy phenyl; or R2 and R3 are fused cycloalkane with C3-C5.