20951-33-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20951-33-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,9,5 and 1 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 20951-33:
(7*2)+(6*0)+(5*9)+(4*5)+(3*1)+(2*3)+(1*3)=91
91 % 10 = 1
So 20951-33-1 is a valid CAS Registry Number.