667887-22-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 667887-22-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,7,8,8 and 7 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 667887-22:
(8*6)+(7*6)+(6*7)+(5*8)+(4*8)+(3*7)+(2*2)+(1*2)=231
231 % 10 = 1
So 667887-22-1 is a valid CAS Registry Number.