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 1999 · 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
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.
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.
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
- 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.