Molekula
Cephalexin monohydrate
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
Cephalexin monohydrate is a semi-synthetic first-generation cephalosporin antibiotic used primarily for treating bacterial infections, including respiratory, urinary, and skin infections. It is effective against both Gram-positive and some Gram-negative bacteria. This chemical has a CAS number of 23325-78-2, with the molecular formula C16H17N3O4S and a molecular weight of 365.40 g/mol. It should be stored at ambient conditions and handled with caution, as it carries a "Danger" signal word. Molekula supplies Cephalexin monohydrate 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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25 g — £46.50 per pack ex VAT · £55.80 inc. VAT
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Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
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Specifications
| Property | Value |
|---|---|
| Appearance | White to off-white powder |
| Water | 4.0 to 8.0% |
| Impurity B | ≤ 1.0% |
| pH | 4.0 - 5.5 |
| Specific optical rotation | +149 to +158 |
| Total Impurities | ≤ 3.0% |
| Assay (Anhydrous) | 95.0 - 102.0% |
| Any other impurity | ≤ 1.0% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 89984984 |
| CAS Number | 23325-78-2 |
| IUPAC Name | (6R,7R)-7-[[(2R)-2-amino-2-phenylacetyl]amino]-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid;hydrate |
| Molecular Formula | C16H17N3O4S |
| Molecular Weight | 365.40 |
| Exact Mass | 365.1045 |
| SMILES | CC1=C(N2[C@@H]([C@@H](C2=O)NC(=O)[C@@H](C3=CC=CC=C3)N)SC1)C(=O)O.O |
| InChIKey | AVGYWQBCYZHHPN-CYJZLJNKSA-N |
| InChI | InChI=1S/C16H17N3O4S.H2O/c1-8-7-24-15-11(14(21)19(15)12(8)16(22)23)18-13(20)10(17)9-5-3-2-4-6-9;/h2-6,10-11,15H,7,17H2,1H3,(H,18,20)(H,22,23);1H2/t10-,11-,15-;/m1./s1 |
| PubChem CID | 62921 |
| REACH Code | Y110 |
| HTS Code | 2941.90.30.00 |
| Tariff Code | 2941900000 |
Safety & GHS
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Health Hazard
GHS07
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Serious Health Hazard
GHS08
Hazard statements
- H317 May cause an allergic skin reaction
- H319 Causes serious eye irritation
- H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled
- H362 May cause harm to breast-fed children
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P264 Wash thoroughly after handling
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, 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
- Aristosporin
- Cefalexgobens
- cefalexin hydrate
- cefalexin.H2O
- Ceffanex
- Cephalexin hydrate
- cephalexin.H2O
- Cephalobene
- Palitrex
- SQ 20248
Frequently asked questions
What is Cephalexin monohydrate used for?
Cephalexin monohydrate is a first-generation cephalosporin antibiotic used to treat bacterial infections such as respiratory tract infections, urinary tract infections, and skin infections.
What is the chemical formula and molecular weight of Cephalexin monohydrate?
The chemical formula is **C₁₆H₁₇N₃O₄S**, and the molecular weight is **365.40 g/mol**.
How should Cephalexin monohydrate be stored?
Store at ambient temperature in a dry, well-ventilated area, away from incompatible substances.
What grades or purity levels of Cephalexin monohydrate does Molekula supply?
Molekula supplies **pharmaceutical-grade Cephalexin monohydrate** (typically ≥98% purity).
Can Molekula supply Cephalexin monohydrate in bulk quantities?
Yes, bulk quantities are available upon request—minimum order quantities and packaging options vary by application.
What documentation comes with an order of Cephalexin monohydrate?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and, if applicable, a **pharmaceutical-grade certificate** for regulatory compliance.
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.