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Ampicillin trihydrate

VETRANAL®, analytical standard

Empirical Formula (Hill Notation):
C16H19N3O4S · 3H2O
CAS Number:
Molecular Weight:
EC Number:
MDL number:
PubChem Substance ID:

Quality Level


analytical standard

product line


shelf life

limited shelf life, expiry date on the label


HPLC: suitable
gas chromatography (GC): suitable


white to off-white


198-200 °C (dec.) (lit.)

antibiotic activity spectrum

Gram-negative bacteria
Gram-positive bacteria


clinical testing



Mode of action

cell wall synthesis | interferes

storage temp.


SMILES string




InChI key


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General description

Ampicillin trihydrate is a stable hydrated form of ampicillin.
Chemical structure: ß-lactam


Ampicillin trihydrate has been used as reference standard for determining the residual solvents and its effect on ampicillin trihydrate crystal structure using GC, X-ray powder diffraction (XRPD) and Fourier transform infrared spectroscopy (FT-IR).
Commission Regulation (EU) No 37/2010 of 22 December 2009 on pharmacologically active substances and their classification regarding maximum residue limits in foodstuffs of animal origin
Refer to the product′s Certificate of Analysis for more information on a suitable instrument technique. Contact Technical Service for further support.

Biochem/physiol Actions

A β-lactam antibiotic with an amino group side chain attached to the penicillin structure. Penicillin derivative that inhibits bacterial cell-wall synthesis (peptidoglycan cross-linking) by inactivating transpeptidases on the inner surface of the bacterial cell membrane. Bactericidal only to growing Escherichia coli . Mode of resistance: Cleavage of β-lactam ring of ampicillin by β-lactamase. Antimicrobial spectrum: Gram-negative and Gram-positive bacteria.


250 mg

Other Notes

Keep container tightly closed in a dry and well-ventilated place.

Legal Information

VETRANAL is a registered trademark of Sigma-Aldrich Chemie GmbH


Exclamation markHealth hazard

Signal Word


Hazard Classifications

Eye Irrit. 2 - Resp. Sens. 1 - Skin Irrit. 2 - Skin Sens. 1 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

11 - Combustible Solids



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Origin

Enter Lot Number to search for Certificate of Origin (COO).

More documents

Quotes and Ordering

Determination of residual solvents and investigation of their effect on ampicillin trihydrate crystal structure.
Nojavan S
Journal of Pharmaceutical and Biomedical Analysis, 4;36(5), 983-988 (2005)
Ramendra K Singh et al.
European journal of medicinal chemistry, 45(3), 1078-1086 (2009-12-26)
Curcumin bioconjugates, viz. di-O-tryptophanylphenylalanine curcumin (2), di-O-decanoyl curcumin (3), di-O-pamitoyl curcumin (4), di-O-bis-(gamma,gamma)folyl curcumin (6), C(4)-ethyl-O-gamma-folyl curcumin (8) and 4-O-ethyl-O-gamma-folyl curcumin (10) have been synthesized and tested for their antibacterial and antiviral activities. The conjugates 2, 3, 4, 6 and
Sherif A F Rostom et al.
Bioorganic & medicinal chemistry, 17(2), 882-895 (2008-12-17)
The synthesis of two groups of structure hybrids comprising basically the antipyrine moiety attached to either polysubstituted thiazole or 2,5-disubstituted-1,3,4-thiadiazole counterparts through various linkages is described. Twelve out of the newly synthesized compounds were evaluated for their anti-inflammatory activity using
Ebtehal S Al-Abdullah et al.
European journal of medicinal chemistry, 46(9), 4642-4647 (2011-08-19)
New series of 6-phenyl-2,4-disubstituted pyrimidine-5-carbonitriles namely, 2-substitued thio-6-phenyl-3,4-dihydro-4-oxopyrimidine-5-carbonitriles (5a-d, 6, 7a-d, 8), 2-(4-chlorobenzylthio)-4-chloro-6-phenylpyrimidine-5-carbonitrile (9), 2-(4-chlorobenzylthio)-4-arylthio-6-phenylpyrimidine-5-carbonitriles (10a-d) and 2-(4-chlorobenzylthio)-4-arylamino-6-phenylpyrimidine-5-carbonitriles (11a-d) was synthesized and tested for in vitro activities against a panel of Gram-positive and Gram-negative bacteria and the yeast-like pathogenic fungus
Sherif A F Rostom et al.
Bioorganic & medicinal chemistry, 17(6), 2410-2422 (2009-03-03)
The azole pharmacophore is still considered a viable lead structure for the synthesis of more efficacious and broad spectrum antimicrobial agents. Potential antibacterial and antifungal activities are encountered with some tetrazoles. Therefore, this study presents the synthesis and antimicrobial evaluation

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