667877-81-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 667877-81-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,7,8,7 and 7 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 667877-81:
(8*6)+(7*6)+(6*7)+(5*8)+(4*7)+(3*7)+(2*8)+(1*1)=238
238 % 10 = 8
So 667877-81-8 is a valid CAS Registry Number.