Molekula
Penicillin G potassium salt (Benzylpenicillin potassium salt)
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
Penicillin G potassium salt is a beta-lactam antibiotic derived from *Penicillium* fungi, widely used to treat bacterial infections in humans and animals by inhibiting cell wall synthesis. It is a potassium salt of benzylpenicillin, offering improved solubility and stability compared to the free acid form. This chemical has a CAS number of 113-98-4, with the molecular formula C16H17KN2O4S and a molecular weight of 372.48 g/mol. It should be stored at ambient conditions and handled with caution, as it carries a **Danger** signal word due to its potential hazards. Molekula supplies Penicillin G potassium salt 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 — £30.90 per pack ex VAT · £37.08 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 almost white crystalline powder |
| pH | 5.0 - 7.5 |
| Loss on Drying | ≤ 1.0% |
| Colour of Solution | Not more intensely coloured than intensity Y2 or YG2 of the range of reference |
| Related Substances | ≤ 1.0% |
| Potency | 1440 - 1680u/mg |
| Clarity in Solution | Not more than opalescent than reference suspension 1 |
| Identification (IR) | Conforms to Reference |
| Assay (dried basis) | ≥ 96.0% |
| Polymer of penicillin | ≤ 0.08% |
| Transmittance (400nm) | ≥ 90.0% |
| Butyl acetate | ≤ 0.05% |
| Butanol | ≤ 0.12% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 23531529 |
| CAS Number | 113-98-4 |
| IUPAC Name | potassium (2S,5R,6R)-3,3-dimethyl-7-oxo-6-[(2-phenylacetyl)amino]-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate |
| EC Number | 204-038-0 |
| Molecular Formula | C16H17KN2O4S |
| Molecular Weight | 372.48 |
| Exact Mass | 372.0546 |
| SMILES | CC1([C@@H](N2[C@H](S1)[C@@H](C2=O)NC(=O)CC3=CC=CC=C3)C(=O)[O-])C.[K+] |
| InChIKey | IYNDLOXRXUOGIU-LQDWTQKMSA-M |
| InChI | InChI=1S/C16H18N2O4S.K/c1-16(2)12(15(21)22)18-13(20)11(14(18)23-16)17-10(19)8-9-6-4-3-5-7-9;/h3-7,11-12,14H,8H2,1-2H3,(H,17,19)(H,21,22);/q;+1/p-1/t11-,12+,14-;/m1./s1 |
| PubChem CID | 23664709 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29411020 |
| Tariff Code | 2941100000 |
Safety & GHS
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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
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P333+313 IF skin irritation or a rash occurs: Get medical advice/attention
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
- Benzylpenicillin potassium
- Benzylpenicillin potassium salt
- Penicillin G K
- Penicillin G potassium
- Penicillin G potassium salt
- Pentids
- Pfizerpen
- Potassium benzylpenicillin
- Potassium benzylpenicillinate
- Potassium penicillin G
Frequently asked questions
What is Penicillin G potassium salt used for?
Penicillin G potassium salt is primarily used as an antibiotic to treat bacterial infections, including pneumonia, sepsis, and infections caused by *Streptococcus* and *Staphylococcus* bacteria.
What is the chemical formula and molecular weight of Penicillin G potassium salt?
The chemical formula is **C₁₆H₁₇KN₂O₄S**, and the molecular weight is **372.48 g/mol**.
How should Penicillin G potassium salt be stored?
Store in a cool, dry place at ambient temperature, away from direct sunlight and moisture. Keep containers tightly sealed.
What grades or purities are available for Penicillin G potassium salt?
Molekula supplies **pharmaceutical-grade** and **analytical-grade** Penicillin G potassium salt, with purity levels specified on the Certificate of Analysis (CoA).
Can Molekula supply Penicillin G potassium salt in bulk quantities?
Yes, we offer bulk quantities of Penicillin G potassium salt, with minimum order quantities and packaging options tailored to your needs—contact us for details.
What documentation comes with an order of Penicillin G potassium salt?
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.