664987-39-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 664987-39-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,4,9,8 and 7 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 664987-39:
(8*6)+(7*6)+(6*4)+(5*9)+(4*8)+(3*7)+(2*3)+(1*9)=227
227 % 10 = 7
So 664987-39-7 is a valid CAS Registry Number.