1509918-91-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1509918-91-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,5,0,9,9,1 and 8 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1509918-91:
(9*1)+(8*5)+(7*0)+(6*9)+(5*9)+(4*1)+(3*8)+(2*9)+(1*1)=195
195 % 10 = 5
So 1509918-91-5 is a valid CAS Registry Number.