21500-57-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21500-57-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,5,0 and 0 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 21500-57:
(7*2)+(6*1)+(5*5)+(4*0)+(3*0)+(2*5)+(1*7)=62
62 % 10 = 2
So 21500-57-2 is a valid CAS Registry Number.