1212818-21-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1212818-21-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,1,2,8,1 and 8 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1212818-21:
(9*1)+(8*2)+(7*1)+(6*2)+(5*8)+(4*1)+(3*8)+(2*2)+(1*1)=117
117 % 10 = 7
So 1212818-21-7 is a valid CAS Registry Number.