79643-81-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 79643-81-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,9,6,4 and 3 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 79643-81:
(7*7)+(6*9)+(5*6)+(4*4)+(3*3)+(2*8)+(1*1)=175
175 % 10 = 5
So 79643-81-5 is a valid CAS Registry Number.