21172-30-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21172-30-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,1,7 and 2 respectively; the second part has 2 digits, 3 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 21172-30:
(7*2)+(6*1)+(5*1)+(4*7)+(3*2)+(2*3)+(1*0)=65
65 % 10 = 5
So 21172-30-5 is a valid CAS Registry Number.