51721-15-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 51721-15-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,1,7,2 and 1 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 51721-15:
(7*5)+(6*1)+(5*7)+(4*2)+(3*1)+(2*1)+(1*5)=94
94 % 10 = 4
So 51721-15-4 is a valid CAS Registry Number.