77891-02-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 77891-02-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,8,9 and 1 respectively; the second part has 2 digits, 0 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 77891-02:
(7*7)+(6*7)+(5*8)+(4*9)+(3*1)+(2*0)+(1*2)=172
172 % 10 = 2
So 77891-02-2 is a valid CAS Registry Number.