21412-23-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21412-23-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,4,1 and 2 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 21412-23:
(7*2)+(6*1)+(5*4)+(4*1)+(3*2)+(2*2)+(1*3)=57
57 % 10 = 7
So 21412-23-7 is a valid CAS Registry Number.