158117-42-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 158117-42-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,8,1,1 and 7 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 158117-42:
(8*1)+(7*5)+(6*8)+(5*1)+(4*1)+(3*7)+(2*4)+(1*2)=131
131 % 10 = 1
So 158117-42-1 is a valid CAS Registry Number.