309946-71-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 309946-71-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,0,9,9,4 and 6 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 309946-71:
(8*3)+(7*0)+(6*9)+(5*9)+(4*4)+(3*6)+(2*7)+(1*1)=172
172 % 10 = 2
So 309946-71-2 is a valid CAS Registry Number.