Cefotetan

Cefotetan: cephamycin antibiotic (second generation).

Cefotetan testing at Vanguard Laboratory: identity, purity and quantity $250 per sample, with results in 3 to 5 business days.

Structure

Cefotetan: 2D structure drawn from the PubChem record (CID 53025).

Compound data

CAS number

69712-56-7

Formula

C₁₇H₁₇N₇O₈S₄

Molecular weight

575.62 g/mol

Type

Cephamycin antibiotic (second generation)

Structure and names

Identity: Cefotetan

IUPAC name: (6R,7S)-7-[[4-(2-amino-1-carboxy-2-oxoethylidene)-1,3-dithietane-2-carbonyl]amino]-7-methoxy-3-[(1-methyltetrazol-5-yl)sulfanylmethyl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid

How Vanguard tests Cefotetan

Method for the $250 identity, purity and quantity test: HPLC-UV purity and assay, LC-MS identity, against a reference standard, with results in 3 to 5 business days.

The USP monograph covers identity by infrared spectroscopy and HPLC retention time, assay by HPLC, and water, sterility and bacterial endotoxins. Full testing to the USP Cefotetan monograph is available and quoted.

What's reported

Purity, as percent of total peak area
Quantity, against the label claim
Identity, reported as match or no match against the reference standard
With monograph testing (quoted): the monograph’s tests against its limits

Tests and prices

Purity and quantity

$250

Chromatographic purity and mg per unit by the method matched to the compound, identity against a reference standard. 1 unit.

Raw powder purity

$200

Chromatographic purity on bulk powder. 50 mg.

Add-on tests

Add-on test	Price
Identity and impurities
FTIR identity	$90
CHNS elemental analysis (carbon, hydrogen, nitrogen, sulfur)	$125
Chiral purity (where a chiral method exists; new methods quoted)	$250
Water, solvents and salt form
Water content by Karl Fischer	$60
Residual solvents	$150
Counterions: chloride, acetate and TFA	$70
Assay
Assay, % w/w (with raw powder purity; $250 together)	+$50
Metals and conformity
Heavy metals: arsenic, cadmium, chromium, mercury and lead	$150
Conformity: purity and quantity on more units from the same lot	$100 per extra unit
Microbiology (injectables)
Endotoxin	$210
Sterility or bioburden	$150
Container closure integrity (CCI)	$50
Screening
Fentanyl screen	$50

10% off for 10 or more samples.

Need something else? Other tests are available on request.

Sample amount and turnaround

Purity and quantity is $250 per sample (1 unit) and raw powder purity is $200 for 50 mg, with results in 3 to 5 business days. Send the material sealed and labeled, with the label claim and the form it contains.

Salts, forms and compendial references

Cefotetan (CAS 69712-56-7)
Cefotetan Disodium
Tell us the salt or form the label states, so quantity is reported on the same basis.

Questions about Cefotetan testing

Is the $250 test the same as USP monograph testing?

No. The $250 test covers identity, purity and quantity by HPLC-UV for purity and assay, with LC-MS to confirm identity. Full testing to the USP Cefotetan monograph is available and quoted.

Why can cefotetan show two closely related peaks?

Cefotetan forms a tautomer in solution, and the two forms can separate on HPLC. Both are counted as cefotetan when the assay is calculated.

What side chain can break off cefotetan?

Cefotetan carries a 1-methyltetrazole-5-thiol side chain that can be released as it degrades. This shows up as a separate peak in the HPLC profile.

Is cefotetan sold as the free acid or the disodium salt?

Vials for injection contain cefotetan disodium, while USP expresses content as cefotetan. Tell us which basis you need.

Sources

https://pubchem.ncbi.nlm.nih.gov/compound/53025

Identity facts from the USP monograph header for this compound.

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