77172-41-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 77172-41-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,1,7 and 2 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 77172-41:
(7*7)+(6*7)+(5*1)+(4*7)+(3*2)+(2*4)+(1*1)=139
139 % 10 = 9
So 77172-41-9 is a valid CAS Registry Number.