1257631-81-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1257631-81-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,7,6,3 and 1 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1257631-81:
(9*1)+(8*2)+(7*5)+(6*7)+(5*6)+(4*3)+(3*1)+(2*8)+(1*1)=164
164 % 10 = 4
So 1257631-81-4 is a valid CAS Registry Number.