Cloxacillin: penicillin antibiotic (isoxazolyl penicillin).
Cloxacillin testing at Vanguard Laboratory: identity, purity and quantity $250 per sample, with results in 3 to 5 business days.
Cloxacillin: 2D structure drawn from the PubChem record (CID 6098).
61-72-3
C19H18ClN3O5S
435.88 g/mol
Penicillin antibiotic (isoxazolyl penicillin)
Identity: Cloxacillin
IUPAC name: (2S,5R,6R)-6-[[3-(2-chlorophenyl)-5-methyl-1,2-oxazole-4-carbonyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-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 Cloxacillin Sodium monograph covers identity by infrared spectroscopy, HPLC retention time and a sodium test, assay by HPLC, organic impurities by HPLC, a dimethylaniline limit, pH, water determination and sterility. Full testing to the USP Cloxacillin Benzathine 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 Cloxacillin Benzathine monograph is available and quoted.
Yes. The two salts have very different molecular weights, so the same mass contains a different amount of cloxacillin. Tell us which salt is on the label and the assay is reported as cloxacillin or as the salt.
Yes. The beta-lactam ring opens with water and heat to form penicilloic acids, which show as separate peaks in the HPLC purity profile. Keep samples dry and sealed.
Yes. It is an oily suspension, so cloxacillin is extracted from the base before HPLC, and the result is reported per syringe or against the label claim.
https://pubchem.ncbi.nlm.nih.gov/compound/6098
Identity facts from the USP monograph header for this compound.
Start an order online, or send the compound name and the tests you need for a quote.
