172173-72-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 172173-72-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,2,1,7 and 3 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 172173-72:
(8*1)+(7*7)+(6*2)+(5*1)+(4*7)+(3*3)+(2*7)+(1*2)=127
127 % 10 = 7
So 172173-72-7 is a valid CAS Registry Number.