12219-57-7 Usage
Preparation
4-Aminobenzenesulfonic acid diazo, and 2,3′,4,4′,6-Pentahydroxybenzophenone?coupling
Properties and Applications
yellow light brown. Mainly used for leather color
Check Digit Verification of cas no
The CAS Registry Mumber 12219-57-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,2,2,1 and 9 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 12219-57:
(7*1)+(6*2)+(5*2)+(4*1)+(3*9)+(2*5)+(1*7)=77
77 % 10 = 7
So 12219-57-7 is a valid CAS Registry Number.