667891-64-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 667891-64-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,7,8,9 and 1 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 667891-64:
(8*6)+(7*6)+(6*7)+(5*8)+(4*9)+(3*1)+(2*6)+(1*4)=227
227 % 10 = 7
So 667891-64-7 is a valid CAS Registry Number.