33639-83-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 33639-83-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,3,6,3 and 9 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 33639-83:
(7*3)+(6*3)+(5*6)+(4*3)+(3*9)+(2*8)+(1*3)=127
127 % 10 = 7
So 33639-83-7 is a valid CAS Registry Number.