Impurity Reference Standard - Products

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Cleanchem is a trusted provider of premium pharmaceutical reference materials, specializing in Cefadroxil and its associated compounds. Our catalog includes pharmacopeial and non-pharmacopeial Cefadroxil impurities, metabolites, nitrosamine derivatives (N-NO compounds), and stable isotope-labeled products. These reference standards play a critical role in pharmaceutical R&D, supporting activities such as product formulation, ANDA and DMF submissions, quality assurance, analytical method development, and stability assessments.
All Cefadroxil-related substances undergo comprehensive characterization and are delivered with complete Certificates of Analysis and supporting analytical documentation to ensure regulatory adherence. Upon request, we can offer EP/USP traceable standards. Our products are routinely re-evaluated to maintain consistent quality and performance.

Cefadroxil

CAT No: CL-CDX-01 CAS No: 50370-12-2 Mol Wt: 363.39 Mol F: C16H17N3O5S Inv Status: In Stock

Chemical Name: (6R,7R)-7-[[(2R)-2-Amino-2-(4-hydroxyphenyl)acetyl]amino]-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid

Cefadroxil EP Impurity A

CAT No: CL-CDX-02 CAS No: 22818-40-2 Mol Wt: 167.2 Mol F: C8H9NO3 Inv Status: In Stock

Chemical Name: (R)-2-Amino-2-(4-hydroxyphenyl)acetic acid (as per EP & USP)

Cefadroxil EP Impurity B

CAT No: CL-CDX-03 CAS No: 22252-43-3 Mol Wt: 214.2 Mol F: C8H10N2O3S Inv Status: Custom Synthesis

Chemical Name: (6R,7R)-7-Amino-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid (as per EP & USP)

Cefadroxil EP Impurity C

CAT No: CL-CDX-04 CAS No: 147103-96-6 Mol Wt: 381.4 Mol F: C16H19N3O6S Inv Status: Custom Synthesis

Chemical Name: (2R,5RS)-2-[(R)-[[(2R)-2-Amino-2-(4-hydroxyphenyl)acetyl]amino]carboxymethyl]-5-methyl-5,6-dihydro-2H-1,3-thiazine-4-carboxylic acid

Cefadroxil EP Impurity D

CAT No: CL-CDX-05 CAS No: 144790-28-3 Mol Wt: 363.4 Mol F: C16H17N3O5S Inv Status: Custom Synthesis

Chemical Name: (6R,7R)-7-[[(2S)-2-Amino-2-(4-hydroxyphenyl)acetyl]amino]-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid ; (6R,7R)-7-[(S)-2-Amino-2-(4-hydroxyphenyl)acetamido]-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid (as per USP)

Cefadroxil EP Impurity E

CAT No: CL-CDX-06 CAS No: 147103-93-3 Mol Wt: 233.2 Mol F: C11H11N3O3 Inv Status: Custom Synthesis

Chemical Name: (6RS)-3-(Aminomethylene)-6-(4-hydroxyphenyl)piperazine-2,5-dione 3-(Aminomethylene)-6-(4-hydroxyphenyl)piperazine-2,5-dione (as per USP)

Cefadroxil EP Impurity F

CAT No: CL-CDX-07 CAS No: 147103-95-5 Mol Wt: 512.5 Mol F: C24H24N4O7S Inv Status: Custom Synthesis

Chemical Name: (6R,7R)-7-[[(2R)-2-[[(2RS)-2-Amino-2-(4-hydroxyphenyl)acetyl]amino]-2-(4-hydroxyphenyl)acetyl]amino]-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid ; (6R,7R)-7-{(2R)-2-[2-Amino-2-(4-hydroxyphenyl)acetamido]-2-(4-hydroxyphenyl)acetamido}-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-3-ene-2-carboxylic acid (as per USP)

Cefadroxil EP Impurity G

CAT No: CL-CDX-08 CAS No: 34876-35-2 Mol Wt: 130.2 Mol F: C5H6O2S Inv Status: Custom Synthesis

Chemical Name: 3-Hydroxy-4-methylthiophen-2(5H)-one (as per EP & USP)

Cefadroxil EP Impurity H

CAT No: CL-CDX-09 CAS No: NA Mol Wt: 298.4 : 101.2 Mol F: C13H18N2O4S : C6H15N Inv Status: Custom Synthesis

Chemical Name: Triethylamine (6R,7R)-7-[(2,2-dimethylpropanoyl)amino]-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate

Cefadroxil Monohydrate

CAT No: CL-CDX-10 CAS No: 66592-87-8 Mol Wt: 363.39 : 18.02 Mol F: C16H17N3O5S : H2O Inv Status: In Stock

Chemical Name: (6R,7R)-7-[[(2R)-2-Amino-2-(4-hydroxyphenyl)acetyl]amino]-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid monohydrate

Cefadroxil S-sulfoxide (USP)

CAT No: CL-CDX-11 CAS No: NA Mol Wt: 379.4 Mol F: C16H17N3O6S Inv Status: Custom Synthesis

Chemical Name: (6R,7R)-7-[(R)-2-Amino-2-(4-hydroxyphenyl)acetamido]-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid 5S-oxide

Methoxy Cefadroxil

CAT No: CL-CDX-12 CAS No: 40601-01-2 Mol Wt: 393.4 Mol F: C17H19N3O6S Inv Status: Custom Synthesis

Chemical Name: (6R,7R)-7-(2-amino-2-(4-hydroxyphenyl)acetamido)-3-(methoxymethyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid

N-Ethoxycarbonyl 7-ADCA

CAT No: CL-CDX-13 CAS No: 72820-16-7 Mol Wt: 286.3 Mol F: C11H14N2O5S Inv Status: Custom Synthesis

Chemical Name: N-Ethoxycarbonyl 7-aminodesacetoxycephalosporanic acid

N-Phenylglycyl delta-3 Cefadroxil (USP)

CAT No: CL-CDX-14 CAS No: NA Mol Wt: 512.5 Mol F: C24H24N4O7S Inv Status: Custom Synthesis

Chemical Name: (6R,7R)-7-{(2R)-2-[2-Amino-2-(4-hydroxyphenyl)acetamido]-2-(4-hydroxyphenyl)acetamido}-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-3-ene-2-carboxylic acid

Cefadroxil USP Related Compound I

CAT No: CL-CDX-15 CAS No: 147103-94-4 Mol Wt: 363.4 Mol F: C16H17N3O5S Inv Status: Custom Synthesis

Chemical Name: (6R,7R)-7-((R)-2-Amino-2-(4-hydroxyphenyl)acetamido)-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-3-ene-2-carboxylic Acid

O-Ethoxycarbonyl Cefadroxil (USP)

CAT No: CL-CDX-16 CAS No: 2378158-44-0 Mol Wt: 435.5 Mol F: C19H21N3O7S Inv Status: Custom Synthesis

Chemical Name: (6R,7R)-7-((R)-2-Amino-2-(4-((ethoxycarbonyl)oxy)phenyl)acetamido)-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid

Cefadroxil Ethyl Homolog (USP)

CAT No: CL-CDX-17 CAS No: 2243976-70-5 Mol Wt: 377.4 Mol F: C17H19N3O5S Inv Status: Custom Synthesis

Chemical Name: (6R,7R)-7-[(R)-2-{(6R,7R)-7-[(R)-2-Amino-2-(4-hydroxyphenyl)acetamido]-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxamido}-2-(4-hydroxyphenyl)acetamido]-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid

Cefadroxil Dimer (USP)

CAT No: CL-CDX-18 CAS No: 2378158-45-1 Mol Wt: 708.8 Mol F: C32H32N6O9S2 Inv Status: Custom Synthesis

O- Methoxycarbonyl Cefadroxil

CAT No: CL-CDX-19 CAS No: NA Mol Wt: 421.4 Mol F: C18H19N3O7S Inv Status: Custom Synthesis

Chemical Name: (6R,7R)-7-((R)-2-Amino-2-(4-((methoxycarbonyl)oxy)phenyl)acetamido)-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid

Cefadroxil R-sulfoxide (USP)

CAT No: CL-CDX-20 CAS No: 182290-77-3 Mol Wt: 379.4 Mol F: C16H17N3O6S Inv Status: Custom Synthesis

Chemical Name: (6R,7R)-7-[(R)-2-Amino-2-(4-hydroxyphenyl)acetamido]-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid 5R-oxide

Type:Impurity Reference Standard

Total Products: 20

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