Molekula
Naproxen
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
Naproxen is a nonsteroidal anti-inflammatory drug (NSAID) widely used to relieve pain, reduce inflammation, and lower fever in medical and veterinary applications. It is also employed in research for its pharmacological properties. This chemical has a CAS number of 22204-53-1, molecular formula CH₃OC₁₀H₆CH(CH₃)CO₂H, and a molecular weight of 230.26. It should be stored at ambient temperatures and handled with caution, as it carries a signal word of "Danger." Molekula supplies Naproxen 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.
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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5 g — £51.40 per pack ex VAT · £61.68 inc. VAT
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Specifications
| Property | Value |
|---|---|
| Appearance | White crystalline powder |
| Melting Point | 154 - 158 Deg C |
| Specific rotation | +83 to +89.5 |
| Heavy metals | <0.002% |
| Loss on Drying | <0.5% |
| Assay | 98.5 - 101.5% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 6.1 |
| Packing Group | III |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | White to off-white crystalline powder |
| Odour | Practically odorless |
| Melting Point | 155 °C |
| Water Solubility | 15.9 mg/L at 25 °C |
| Solubility (other solvents) | Slightly soluble in ether; soluble in methanol, chloroform |
| pKa | pKa = 4.15 |
| log P (octanol/water) | 3.18 |
Source: PubChem CID 156391 (HSDB, DrugBank)
Identification
| Property | Value |
|---|---|
| SKU | 25190315 |
| CAS Number | 22204-53-1 |
| IUPAC Name | (2S)-2-(6-methoxynaphthalen-2-yl)propanoic acid |
| EC Number | 244-838-7 |
| Molecular Formula | CH3OC10H6CH(CH3)CO2H |
| Molecular Weight | 230.26 |
| Exact Mass | 230.0943 |
| SMILES | C[C@@H](C1=CC2=C(C=C1)C=C(C=C2)OC)C(=O)O |
| InChIKey | CMWTZPSULFXXJA-VIFPVBQESA-N |
| InChI | InChI=1S/C14H14O3/c1-9(14(15)16)10-3-4-12-8-13(17-2)6-5-11(12)7-10/h3-9H,1-2H3,(H,15,16)/t9-/m0/s1 |
| PubChem CID | 156391 |
| UN Number | UN2811 |
| REACH Code | Y110 |
| HTS Code | 29189947 |
| Tariff Code | 2918999090 |
Safety & GHS
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Toxic
GHS06
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Serious Health Hazard
GHS08
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Hazardous to the Environment
GHS09
Hazard statements
- H301 Toxic if swallowed
- H317 May cause an allergic skin reaction
- H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled
- H360 May damage fertility or the unborn child
- H372 Causes damage to organs through prolonged or repeated exposure
- H411 Toxic to aquatic life with long lasting effects
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P308+313 IF exposed or concerned: Get medical advice/attention
Documents
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
- (2S)-2-(6-methoxynaphthalen-2-yl)propanoic acid
- (S)-(+)-2-(6-Methoxy-2-naphthyl)propionic acid
- (S)-Naproxen
- d-Naproxen
- Ec-Naprosyn
- Equiproxen
- Naixan
- Naprosyn
- Naproxene
- Nycopren
Frequently asked questions
What is naproxen commonly used for?
Naproxen is primarily used as a nonsteroidal anti-inflammatory drug (NSAID) for pain relief, reducing inflammation, and treating conditions like arthritis, menstrual cramps, and migraines.
What is the chemical formula and molecular weight of naproxen?
The chemical formula is **CH₃OC₁₀H₆CH(CH₃)CO₂H**, and the molecular weight is **230.26 g/mol**.
How should naproxen be stored?
Store naproxen at **ambient temperature** in a dry, well-ventilated area, away from direct sunlight and incompatible substances.
What grades or purities of naproxen does Molekula supply?
Molekula supplies naproxen in **pharmaceutical-grade purity** (typically ≥99%), suitable for research, formulation, or industrial applications.
Can Molekula supply naproxen in bulk quantities?
Yes, Molekula can provide naproxen in **bulk quantities** (e.g., 1 kg, 5 kg, or larger), depending on availability and customer requirements.
What documentation comes with a naproxen order?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and **batch-specific documentation** for traceability.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.