42171-15-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 42171-15-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,1,7 and 1 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 42171-15:
(7*4)+(6*2)+(5*1)+(4*7)+(3*1)+(2*1)+(1*5)=83
83 % 10 = 3
So 42171-15-3 is a valid CAS Registry Number.