172821-12-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 172821-12-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,2,8,2 and 1 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 172821-12:
(8*1)+(7*7)+(6*2)+(5*8)+(4*2)+(3*1)+(2*1)+(1*2)=124
124 % 10 = 4
So 172821-12-4 is a valid CAS Registry Number.