1299343-31-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1299343-31-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,9,9,3,4 and 3 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1299343-31:
(9*1)+(8*2)+(7*9)+(6*9)+(5*3)+(4*4)+(3*3)+(2*3)+(1*1)=189
189 % 10 = 9
So 1299343-31-9 is a valid CAS Registry Number.