667877-34-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 667877-34-1 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, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 667877-34:
(8*6)+(7*6)+(6*7)+(5*8)+(4*7)+(3*7)+(2*3)+(1*4)=231
231 % 10 = 1
So 667877-34-1 is a valid CAS Registry Number.