99305-31-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 99305-31-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,3,0 and 5 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 99305-31:
(7*9)+(6*9)+(5*3)+(4*0)+(3*5)+(2*3)+(1*1)=154
154 % 10 = 4
So 99305-31-4 is a valid CAS Registry Number.