20731-22-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20731-22-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,7,3 and 1 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 20731-22:
(7*2)+(6*0)+(5*7)+(4*3)+(3*1)+(2*2)+(1*2)=70
70 % 10 = 0
So 20731-22-0 is a valid CAS Registry Number.