1211517-55-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1211517-55-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,1,1,5,1 and 7 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1211517-55:
(9*1)+(8*2)+(7*1)+(6*1)+(5*5)+(4*1)+(3*7)+(2*5)+(1*5)=103
103 % 10 = 3
So 1211517-55-3 is a valid CAS Registry Number.