172904-39-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 172904-39-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,2,9,0 and 4 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 172904-39:
(8*1)+(7*7)+(6*2)+(5*9)+(4*0)+(3*4)+(2*3)+(1*9)=141
141 % 10 = 1
So 172904-39-1 is a valid CAS Registry Number.