33918-81-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 33918-81-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,3,9,1 and 8 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 33918-81:
(7*3)+(6*3)+(5*9)+(4*1)+(3*8)+(2*8)+(1*1)=129
129 % 10 = 9
So 33918-81-9 is a valid CAS Registry Number.