Cefoxitin EP Impurity I

CASnot assigned
CatalogueRS-I001A48
FormulaC16H17N3O7S2
MW427.05

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Chemical structure of Cefoxitin EP Impurity I

Product identification

Product name	Cefoxitin EP Impurity I
Catalogue No.	RS-I001A48
CAS No.	not assigned
Molecular formula	C16H17N3O7S2
Molecular weight	427.05
Availability	Back order— restocking can be arranged, about 1–2 weeks
Standard type	Impurity Reference Standards
Drug substance	Cefoxitin
Storage	Refer to the certificate of analysis (COA) supplied with each lot
Intended use	For laboratory and research use only. Not for human or veterinary use.

What is stated on the certificate

Content and purity are assigned per lot and stated on the certificate of analysis issued for the batch you receive — they are not a catalogue-level figure. The certificate records the tests performed, the specification applied and the result obtained for that lot.

Fields recorded on the certificate of analysis
Field	Basis
Identity	Spectroscopic and chromatographic methods appropriate to the material
Purity	Chromatographic purity, area normalisation unless stated otherwise
Assay / content	Mass balance, corrected for the stated volatiles and residue
Catalogue and batch numbers	RS-I001A48 / batch number on the certificate
Retest date	Printed on the certificate for the lot supplied

Frequently asked

What documentation is supplied with this lot?

A certificate of analysis (COA) is issued for the lot you receive. It records the catalogue number RS-I001A48 and the batch number, the tests performed, the specification applied and the result obtained. A safety data sheet is supplied with the shipment.

Is the assigned value given on an “as is” basis?

Content and purity are stated per lot on the certificate of analysis, on an “as is” basis unless the certificate says otherwise. The analytical basis for the assigned value is stated on the certificate.

How should this material be stored?

Store as stated: Refer to the certificate of analysis (COA) supplied with each lot. Re-test before use beyond the retest date printed on the certificate.

Do you supply pack sizes other than those listed?

Pack sizes are confirmed with the quotation. Quantities beyond the standard pack sizes can be quoted — send the quantity you need with your enquiry.

Finding this standard

Buyers reach this compound by CAS number, by catalogue number, through the drug substance it belongs to, or through the type of standard it is. Those routes all start here:

Searching another way? Send the structure, a SMILES string or the pharmacopoeial name — a CAS number is not required for a non-compendial impurity. Write to sales@rssechem.com.

Other standards of Cefoxitin

All 28 further standards are listed here — every link is in the page, not loaded later.

Cefoxitin

CAS 35607-66-0C16H17N3O7S2

BACK ORDERRS-I002099
Cefoxitin EP Impurity A

CAS 1158963-31-5C15H16N2O6S2

IN STOCKRS-Z394ROB
Cefoxitin EP Impurity A Potassium Salt

CAS 37051-16-4C15H15KN2O6S2

CUSTOM SYNTHESISRS-I001ACP
Cefoxitin EP Impurity B

CAS 1422023-32-2C16H17N3O7S2

BACK ORDERRS-C054002
Cefoxitin EP Impurity I

CAS 1222095-68-2C16H17N3O7S2

CUSTOM SYNTHESISRS-C054006
Cefoxitin Impurity 1 Sodium Salt(Cefoxitin EP Impurity A Sodium Salt)

CAS 94089-00-6C15H15N2O6S2-·Na+

BACK ORDERRS-C054009
Cefoxitin Impurity E

CAS 2395025-32-6C17H19N3O8S2

BACK ORDERRS-C054003
Cefoxitin Impurity F

CAS 2395025-37-1C17H19N3O8S2

BACK ORDERRS-C054004
(6R)-methyl 3-((carbamoyloxy)methyl)-8-oxo-7-(2-(thiophen-2-yl)acetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate

CAS not assignedC16H17N3O6S2

BACK ORDERRS-C054045
(6R,7S)-methyl 3-((carbamoyloxy)methyl)-7-methoxy-8-oxo-7-(2-(thiophen-2-yl)acetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate

CAS not assignedC17H19N3O7S2

BACK ORDERRS-C054036
(6R,7S)-methyl 3-((carbamoyloxy)methyl)-7-methoxy-8-oxo-7-(2-(thiophen-2-yl)acetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate 5-oxide

CAS not assignedC17H19N3O8S2

BACK ORDERRS-C054044
(6R,7S)-methyl 7-(carbamoyloxy)-3-((carbamoyloxy)methyl)-8-oxo-7-(2-(thiophen-2-yl)acetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate 5-oxide

CAS not assignedC17H18N4O9S2

BACK ORDERRS-C054043
2-(Thiophen-2-yl)acetamide

CAS 4461-29-4C6H7NOS

IN STOCKRS-U016256
Cefoxitin Sodium Salt

CAS 33564-30-6C16H16N3NaO7S2

BACK ORDERRS-I002097
Cefoxitin-d3 Sodium Salt

CAS 1316289-46-9C16H13D3N3NaO7S2

BACK ORDERRS-I098204
Deacetylcephalothin Lactone

CAS 10590-10-0C14H12N2O4S2

IN STOCKRS-C054001
Methyl Cefoxitin

CAS 40514-94-1C15H16N2O5S2

IN STOCKRS-I015043
sodium (6R,7R)-3-((carbamoyloxy)methyl)-8-oxo-7-(2-(thiophen-2-yl)acetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate

CAS not assignedC15H14N3NaO6S2

BACK ORDERRS-C054077
sodium (6R,7S)-3-((carbamoyloxy)methyl)-7-methoxy-8-oxo-7-(2-(thiophen-2-yl)acetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate 5-oxide

CAS not assignedC16H16N3NaO8S2

BACK ORDERRS-C054080
sodium (6R,7S)-3-((carbamoyloxy)methyl)-7-methoxy-8-oxo-7-(2-(thiophen-3-yl)acetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate

CAS not assignedC16H16N3NaO7S2

BACK ORDERRS-C054023
sodium (R)-5-((carbamoyloxy)methyl)-2-((S)-carboxy(methoxy)(2-(thiophen-2-yl)acetamido)methyl)-3,6-dihydro-2H-1,3-thiazine-4-carboxylate

CAS not assignedC16H18N3NaO8S2

BACK ORDERRS-C054081
Cefoxitin Impurity 16

CAS 73356-24-8C16H17N3O7S2

CUSTOM SYNTHESISRS-Z412S9I
Cefoxitin Impurity 20

CAS 34279-51-1C16H22N4O9S

CUSTOM SYNTHESISRS-Z412Q61
Cefoxitin Impurity 31

CAS not assignedC15H15N3O7S2

BACK ORDERRS-I001BNN
Cefoxitin Impurity 48

CAS not assignedC31H35N5O11S4

CUSTOM SYNTHESISRS-I001B6F
Cefoxitin Impurity 49

CAS not assignedC30H31N5O10S4

BACK ORDERRS-I001BU2
Cefoxitin Impurity 53

CAS 372517-84-5C16H19N3O8S2

BACK ORDERRS-C054007
Cefoxitin Impurity 54

CAS 40514-91-8C13H20N2O4S

IN STOCKRS-C054008

Pharmacopoeial names (EP, USP, BP, JP) are used for identification purposes only and do not imply endorsement by those bodies. This product is supplied for laboratory and research use only — not for human or veterinary use.