664982-91-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 664982-91-6 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 2 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 664982-91:
(8*6)+(7*6)+(6*4)+(5*9)+(4*8)+(3*2)+(2*9)+(1*1)=216
216 % 10 = 6
So 664982-91-6 is a valid CAS Registry Number.