21170-09-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21170-09-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,1,7 and 0 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 21170-09:
(7*2)+(6*1)+(5*1)+(4*7)+(3*0)+(2*0)+(1*9)=62
62 % 10 = 2
So 21170-09-2 is a valid CAS Registry Number.