157543-42-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 157543-42-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,5,4 and 3 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 157543-42:
(8*1)+(7*5)+(6*7)+(5*5)+(4*4)+(3*3)+(2*4)+(1*2)=145
145 % 10 = 5
So 157543-42-5 is a valid CAS Registry Number.