68820-91-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 68820-91-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,8,8,2 and 0 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 68820-91:
(7*6)+(6*8)+(5*8)+(4*2)+(3*0)+(2*9)+(1*1)=157
157 % 10 = 7
So 68820-91-7 is a valid CAS Registry Number.