79987-81-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 79987-81-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,9,9,8 and 7 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 79987-81:
(7*7)+(6*9)+(5*9)+(4*8)+(3*7)+(2*8)+(1*1)=218
218 % 10 = 8
So 79987-81-8 is a valid CAS Registry Number.