667885-16-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 667885-16-7 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 5 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 667885-16:
(8*6)+(7*6)+(6*7)+(5*8)+(4*8)+(3*5)+(2*1)+(1*6)=227
227 % 10 = 7
So 667885-16-7 is a valid CAS Registry Number.