6421-67-6 Usage
Preparation
5-Amino-2-chlorobenzenesulfonic acid diazo, coupled with 2-Hydroxybenzoic acid, and then into chromium complex.
Properties and Applications
yellow.
Check Digit Verification of cas no
The CAS Registry Mumber 6421-67-6 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,4,2 and 1 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 6421-67:
(6*6)+(5*4)+(4*2)+(3*1)+(2*6)+(1*7)=86
86 % 10 = 6
So 6421-67-6 is a valid CAS Registry Number.