1217542-54-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1217542-54-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,1,7,5,4 and 2 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 1217542-54:
(9*1)+(8*2)+(7*1)+(6*7)+(5*5)+(4*4)+(3*2)+(2*5)+(1*4)=135
135 % 10 = 5
So 1217542-54-5 is a valid CAS Registry Number.