1234457-71-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1234457-71-6 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,3,4,4,5 and 7 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1234457-71:
(9*1)+(8*2)+(7*3)+(6*4)+(5*4)+(4*5)+(3*7)+(2*7)+(1*1)=146
146 % 10 = 6
So 1234457-71-6 is a valid CAS Registry Number.