A

Ampicillin

IUPAC: (2S,5R,6R)-6-[[(2R)-2-amino-2-phenylacetyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid

C16H19N3O4S Organic Compounds CAS 69-53-4
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Quick Reference
Formula / NotationC16H19N3O4S
CAS Number69-53-4
Molecular Weight349.4
Melting Point208 dec °C
Solubility10100 mg/L (at 21 °C)
AppearanceSolid
Also Known As(2S,5R,6R)-6-[[(2R)-2-amino-2-phenylacetyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid; 69-53-4; Aminobenzylpenicillin; Ampicillin acid; Tokiocillin; Ampicilline; Semicillin; Ultrabion; anhydrous ampicillin; Ampicillin Anhydrous
CategoryOrganic Compounds

What is Ampicillin?

Ampicillin is a penicillin in which the substituent at position 6 of the penam ring is a 2-amino-2-phenylacetamido group. It has a role as an antibacterial drug. It is a penicillin, a beta-lactam antibiotic and a penicillin allergen. It is a conjugate acid of an ampicillin(1-).

Formula & Notation

C16H19N3O4S

IUPAC Name: (2S,5R,6R)-6-[[(2R)-2-amino-2-phenylacetyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid

Other Names / Synonyms: (2S,5R,6R)-6-[[(2R)-2-amino-2-phenylacetyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid; 69-53-4; Aminobenzylpenicillin; Ampicillin acid; Tokiocillin; Ampicilline; Semicillin; Ultrabion; anhydrous ampicillin; Ampicillin Anhydrous

Properties & Characteristics

Appearance: Solid. Molecular formula: C16H19N3O4S. Molecular weight: 349.4 g/mol. Melting point: 208 dec °C. Solubility: 10100 mg/L (at 21 °C). LogP: -1.1.

Physical Data

PropertyValue
Melting Point208 dec °C
Molecular Weight349.4
Solubility10100 mg/L (at 21 °C)
AppearanceSolid

Uses & Applications

Used as an industrial feedstock, solvent, pharmaceutical intermediate, flavoring agent, or chemical building block.

Safety Information

Flammable or irritant. Many organic compounds are flammable liquids or vapours. Keep away from ignition sources. Consult SDS for specific hazard data.

Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.

Key Facts

Term Ampicillin
Formula C16H19N3O4S
CAS Number 69-53-4
Molecular Weight 349.4
Synonyms (2S,5R,6R)-6-[[(2R)-2-amino-2-phenylacetyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid; 69-53-4; Aminobenzylpenicillin; Ampicillin acid; Tokiocillin; Ampicilline; Semicillin; Ultrabion; anhydrous ampicillin; Ampicillin Anhydrous

Frequently Asked Questions

Ampicillin is a penicillin in which the substituent at position 6 of the penam ring is a 2-amino-2-phenylacetamido group. It has a role as an antibacterial drug. It is a penicillin, a beta-lactam antibiotic and a penicillin allergen. It is a conjugate acid of an ampicillin(1-).

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Editorial standards: Chemical data is sourced from peer-reviewed literature, CAS Registry, NIST WebBook, and PubChem. Safety information reflects guidance from OSHA, ECHA, and IAEA. For educational purposes only — always consult official SDS documentation and qualified professionals before handling chemicals.