1212136-21-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1212136-21-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,1,2,1,3 and 6 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1212136-21:
(9*1)+(8*2)+(7*1)+(6*2)+(5*1)+(4*3)+(3*6)+(2*2)+(1*1)=84
84 % 10 = 4
So 1212136-21-4 is a valid CAS Registry Number.