642981-62-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 642981-62-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,2,9,8 and 1 respectively; the second part has 2 digits, 6 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 642981-62:
(8*6)+(7*4)+(6*2)+(5*9)+(4*8)+(3*1)+(2*6)+(1*2)=182
182 % 10 = 2
So 642981-62-2 is a valid CAS Registry Number.