1212121-35-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1212121-35-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,1,2,1,2 and 1 respectively; the second part has 2 digits, 3 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1212121-35:
(9*1)+(8*2)+(7*1)+(6*2)+(5*1)+(4*2)+(3*1)+(2*3)+(1*5)=71
71 % 10 = 1
So 1212121-35-1 is a valid CAS Registry Number.