77983-71-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 77983-71-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,9,8 and 3 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 77983-71:
(7*7)+(6*7)+(5*9)+(4*8)+(3*3)+(2*7)+(1*1)=192
192 % 10 = 2
So 77983-71-2 is a valid CAS Registry Number.