402955-38-8 Usage
Uses
Ertapenem Dimer Ester is an impurity of Ertapenem (E635000).
Check Digit Verification of cas no
The CAS Registry Mumber 402955-38-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,0,2,9,5 and 5 respectively; the second part has 2 digits, 3 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 402955-38:
(8*4)+(7*0)+(6*2)+(5*9)+(4*5)+(3*5)+(2*3)+(1*8)=138
138 % 10 = 8
So 402955-38-8 is a valid CAS Registry Number.