873391-20-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 873391-20-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,7,3,3,9 and 1 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 873391-20:
(8*8)+(7*7)+(6*3)+(5*3)+(4*9)+(3*1)+(2*2)+(1*0)=189
189 % 10 = 9
So 873391-20-9 is a valid CAS Registry Number.