All Photos(1)




Carbenicillin disodium salt

89.0-100.5% anhydrous basis

Sign Into View Organizational & Contract Pricing

Carbenicillin, Disodium carbenicillin, α-Carboxybenzylpenicillin disodium salt
Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
EC Number:
MDL number:
PubChem Substance ID:

biological source

synthetic (chemical)

Quality Level


89.0-100.5% anhydrous basis



storage condition

(Tightly closed. Dry. Keep locked up or in an area accessible only to qualified or authorized )


white to off-white


H2O: 50 mg/mL

antibiotic activity spectrum

Gram-negative bacteria
Gram-positive bacteria

Mode of action

cell wall synthesis | interferes

storage temp.


SMILES string




InChI key


Looking for similar products? Visit Product Comparison Guide

Related Categories

General description

Carbenicillin is a semi-synthetic, broad-spectrum carboxypenicillin antibiotic with bactericidal and beta-lactamase resistant activity. It is a broad-spectrum antibiotic, meaning that it is effective against a wide range of bacteria, including both Gram-positive and Gram-negative bacteria. Carbenicillin is particularly useful against Pseudomonas aeruginosa, a Gram-negative bacterium that is often resistant to other antibiotics.

Carbenicillin is commonly used in cell biology applications to prevent the growth of bacterial contaminants. It is also used in microbiology to select for bacteria that have been transformed with a vector harboring the gene encoding beta-lactamase, which makes them resistant to carbenicillin.


Carbenicillin disodium salt has been used:

  • in the preparation of Luria-Bertani (LB) agar plates and media
  • as a selective agent in the culture media to prevent the growth of bacterial contaminants
  • in a study focused on the development of monoclonal antibodies

Biochem/physiol Actions

Carbenicillin acylates the penicillin-sensitive transpeptidase C-terminal domain by opening the lactam ring. This inactivation prevents the cross-linkage of peptidoglycan strands, thereby inhibiting the third and last stage of bacterial cell wall synthesis. This leads to incomplete bacterial cell wall synthesis and eventually causes cell lysis.
Mode of Action: Carboxypenicillin antibiotic that inhibits bacterial cell-wall synthesis (peptidoglycan cross-linking) by inactivating transpeptidases on the inner surface of the bacterial cell membrane.

Antimicrobial spectrum: Active against Gram-positive and Gram-negative bacteria

Features and Benefits

  • Broad-spectrum antibiotic with bactericidal and beta-lactamase resistant activity
  • Effective against a wide range of bacteria, including Pseudomonas aeruginosa
  • Commonly used in Cell Biology and Biochemical applications
  • Offers greater stablility than ampicillin

Analysis Note

Stable at 37 °C for 3 days

Other Notes

For additional information on our range of Biochemicals, please complete this form.
Keep container tightly closed in a dry and well-ventilated place.


Health hazard

Signal Word


Hazard Statements

Hazard Classifications

Resp. Sens. 1 - Skin Sens. 1

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

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Documents related to the products that you have purchased in the past have been gathered in the Document Library for your convenience.

Visit the Document Library

Difficulty Finding Your Product Or Lot/Batch Number?

Product numbers are combined with Pack Sizes/Quantity when displayed on the website (example: T1503-25G). Please make sure you enter ONLY the product number in the Product Number field (example: T1503).


Product Number
Pack Size/Quantity

Additional examples:





enter as 1.000309185)

Having trouble? Feel free to contact Technical Service for assistance.

Lot and Batch Numbers can be found on a product's label following the words 'Lot' or 'Batch'.

Aldrich Products

  • For a lot number such as TO09019TO, enter it as 09019TO (without the first two letters 'TO').

  • For a lot number with a filling-code such as 05427ES-021, enter it as 05427ES (without the filling-code '-021').

  • For a lot number with a filling-code such as STBB0728K9, enter it as STBB0728 without the filling-code 'K9'.

Not Finding What You Are Looking For?

In some cases, a COA may not be available online. If your search was unable to find the COA you can request one.

Request COA

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service