42172-78-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 42172-78-1 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 2 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 42172-78:
(7*4)+(6*2)+(5*1)+(4*7)+(3*2)+(2*7)+(1*8)=101
101 % 10 = 1
So 42172-78-1 is a valid CAS Registry Number.