1345457-21-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1345457-21-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,4,5,4,5 and 7 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1345457-21:
(9*1)+(8*3)+(7*4)+(6*5)+(5*4)+(4*5)+(3*7)+(2*2)+(1*1)=157
157 % 10 = 7
So 1345457-21-7 is a valid CAS Registry Number.