79961-91-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 79961-91-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,9,9,6 and 1 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 79961-91:
(7*7)+(6*9)+(5*9)+(4*6)+(3*1)+(2*9)+(1*1)=194
194 % 10 = 4
So 79961-91-4 is a valid CAS Registry Number.