31953-21-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 31953-21-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,9,5 and 3 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 31953-21:
(7*3)+(6*1)+(5*9)+(4*5)+(3*3)+(2*2)+(1*1)=106
106 % 10 = 6
So 31953-21-6 is a valid CAS Registry Number.