20311-30-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20311-30-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,3,1 and 1 respectively; the second part has 2 digits, 3 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 20311-30:
(7*2)+(6*0)+(5*3)+(4*1)+(3*1)+(2*3)+(1*0)=42
42 % 10 = 2
So 20311-30-2 is a valid CAS Registry Number.