13917-54-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 13917-54-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,3,9,1 and 7 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 13917-54:
(7*1)+(6*3)+(5*9)+(4*1)+(3*7)+(2*5)+(1*4)=109
109 % 10 = 9
So 13917-54-9 is a valid CAS Registry Number.