16920-31-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 16920-31-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,6,9,2 and 0 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 16920-31:
(7*1)+(6*6)+(5*9)+(4*2)+(3*0)+(2*3)+(1*1)=103
103 % 10 = 3
So 16920-31-3 is a valid CAS Registry Number.