Molekula
Nalidixic acid
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · 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
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.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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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.
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.
Ready to order or need a custom pack?
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