Cefixime: cephalosporin antibiotic (third generation, oral).
Cefixime testing at Vanguard Laboratory: identity, purity and quantity $250 per sample, with results in 3 to 5 business days.
Cefixime: 2D structure drawn from the PubChem record (CID 5362065).
79350-37-1
C16H15N5O7S2
453.45 g/mol
Cephalosporin antibiotic (third generation, oral)
Identity: Cefixime (anhydrous)
IUPAC name: (6R,7R)-7-[[(2Z)-2-(2-amino-1,3-thiazol-4-yl)-2-(carboxymethoxyimino)acetyl]amino]-3-ethenyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid
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, assay by HPLC, organic impurities by HPLC, optical rotation, pH and water determination. Full testing to the USP Cefixime monograph is available and quoted.
Chromatographic purity and mg per unit by the method matched to the compound, identity against a reference standard. 1 unit.
| 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.
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.
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 Cefixime monograph is available and quoted.
Cefixime is usually supplied as the trihydrate, and USP calculates content on the anhydrous basis. Water content links the two, so tell us which basis the label uses.
The E isomer of the oxime side chain is a known cefixime related compound. It has the same mass as cefixime, so it is separated and measured by HPLC rather than by mass.
Usually powder, capsules, chewable tablets or powder for oral suspension. Each form is extracted before HPLC and the result is reported per unit or per gram.
https://pubchem.ncbi.nlm.nih.gov/compound/5362065
Identity facts from the USP monograph header for this compound.
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