157871-81-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 157871-81-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,8,7 and 1 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 157871-81:
(8*1)+(7*5)+(6*7)+(5*8)+(4*7)+(3*1)+(2*8)+(1*1)=173
173 % 10 = 3
So 157871-81-3 is a valid CAS Registry Number.