Molekula
Nalidixic acid
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Nalidixic acid is a synthetic quinolone antibiotic used primarily in research and veterinary medicine for its antibacterial properties. It is effective against Gram-negative bacteria and is commonly studied for its mechanism of action in inhibiting DNA gyrase. Available in powder form with a CAS number of 389-08-2, molecular formula C12H12N2O3, and molecular weight 232.24 g/mol. Stored at ambient temperature, it carries a Danger signal word due to its potential hazards. Molekula supplies Nalidixic acid from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Often bought together
Pricing & pack sizes
In stock — same-day dispatch
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
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25 g — £41.90 per pack ex VAT · £50.28 inc. VAT
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Specifications
| Property | Value |
|---|---|
| Appearance | White to yellow powder |
| Heavy metals | ≤ 20 ppm |
| Single Impurity | Not more intense the spot of reference solution (a) 0.002% w/v |
| Loss on Drying | ≤ 0.5% w/w |
| Assay | ⩾ 99.0% |
| Sulphated Ash | ≤ 0.1% w/w |
| Particle Size | 90%, ≤ 30 µm |
| Any other impurity | Not more intense the spot of reference solution (a) 0.0008% w/v |
| Identification (IR) | Conforms to Reference |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Pale buff, crystalline powder |
| Odour | Odorless |
| Melting Point | 229.5 °C |
| pKa | pKa = 8.6 |
| log P (octanol/water) | 1.41 |
Source: PubChem CID 4421 (HSDB, DrugBank)
Identification
| Property | Value |
|---|---|
| SKU | 37471160 |
| CAS Number | 389-08-2 |
| IUPAC Name | 1-ethyl-7-methyl-4-oxo-1,8-naphthyridine-3-carboxylic acid |
| EC Number | 206-864-7 |
| Molecular Formula | C12H12N2O3 |
| Molecular Weight | 232.24 |
| Exact Mass | 232.0848 |
| SMILES | CCN1C=C(C(=O)C2=C1N=C(C=C2)C)C(=O)O |
| InChIKey | MHWLWQUZZRMNGJ-UHFFFAOYSA-N |
| InChI | InChI=1S/C12H12N2O3/c1-3-14-6-9(12(16)17)10(15)8-5-4-7(2)13-11(8)14/h4-6H,3H2,1-2H3,(H,16,17) |
| PubChem CID | 4421 |
| REACH Code | Y110 |
| HTS Code | 29339979 |
| Tariff Code | 2933998090 |
Safety & GHS
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Health Hazard
GHS07
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Serious Health Hazard
GHS08
Hazard statements
- H302 Harmful if swallowed
- H317 May cause an allergic skin reaction
- H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled
- H351 Suspected of causing cancer
- H361d Suspected of damaging fertility. Suspected of damaging the unborn child.
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P263 Avoid contact during pregnancy/while nursing
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- P302+352 IF ON SKIN: Wash with soap and water
- P342+311 Call a POISON CENTER or doctor
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
Synonyms
- Dixiben
- Nalidic acid
- Nalidixan
- Nalidixin
- Nalidixinic acid
- Nalurin
- Naxuril
- NegGram
- Nevigramon
- Wintomylon
Frequently asked questions
What is nalidixic acid used for?
Nalidixic acid is primarily used as an antibiotic to treat urinary tract infections caused by susceptible bacteria, including *E. coli*, *Klebsiella*, and *Proteus* species.
What is the chemical formula and molecular weight of nalidixic acid?
The chemical formula is **C₁₂H₁₂N₂O₃**, and the molecular weight is **232.24 g/mol**.
How should nalidixic acid be stored?
Store nalidixic acid at **ambient temperature** in a dry, well-ventilated area, away from incompatible substances and moisture.
What grades or purity levels of nalidixic acid does Molekula supply?
Molekula supplies nalidixic acid in **pharmaceutical-grade (USP/EP/BP compliant) and research-grade purity**, typically ≥98% by HPLC.
Can Molekula supply nalidixic acid in bulk quantities?
Yes, Molekula can provide nalidixic acid in **bulk quantities** (1 kg and above) for both research and commercial applications, subject to availability and approval.
What documentation comes with a nalidixic acid order?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and, for pharmaceutical-grade, a **Certificate of Conformity (CoC)** with batch-specific testing data.
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