33981-17-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 33981-17-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,3,9,8 and 1 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 33981-17:
(7*3)+(6*3)+(5*9)+(4*8)+(3*1)+(2*1)+(1*7)=128
128 % 10 = 8
So 33981-17-8 is a valid CAS Registry Number.