1231-32-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1231-32-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,2,3 and 1 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1231-32:
(6*1)+(5*2)+(4*3)+(3*1)+(2*3)+(1*2)=39
39 % 10 = 9
So 1231-32-9 is a valid CAS Registry Number.