34157-21-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 34157-21-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,4,1,5 and 7 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 34157-21:
(7*3)+(6*4)+(5*1)+(4*5)+(3*7)+(2*2)+(1*1)=96
96 % 10 = 6
So 34157-21-6 is a valid CAS Registry Number.