66812-91-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 66812-91-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,8,1 and 2 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 66812-91:
(7*6)+(6*6)+(5*8)+(4*1)+(3*2)+(2*9)+(1*1)=147
147 % 10 = 7
So 66812-91-7 is a valid CAS Registry Number.