321172-40-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 321172-40-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,2,1,1,7 and 2 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 321172-40:
(8*3)+(7*2)+(6*1)+(5*1)+(4*7)+(3*2)+(2*4)+(1*0)=91
91 % 10 = 1
So 321172-40-1 is a valid CAS Registry Number.