05039 Sigma-Aldrich


for microbiology

Synonym: Agar-agar, Gum agar



Related Categories Agars, Base Ingredients for Media, Microbiology More...
grade   for microbiology
form   powder
ign. residue   ≤5%
loss   ≤12% loss on drying
pH   6-7.5 (1.5%after autoclaving)
mp   85-95 °C
transition temp   gel point 33-37 °C (1.5% solution, after autoclaving)
gel strength   >800 g/cm2 (1.5% gel, Nikkan, after autoclaving)
solubility   H2O: soluble1.5% at 70 °C, clear to very faintly turbid, almost colorless


Other Notes

Same product — same quality — now Sigma-Aldrich brand

General description

Agar has been used as reagent for the following studies:
• Plant cell culture studies.
• As medium supplement for the growth of wild-type Arabidopsis thaliana (ecotype Columbia) and transgenic seeds.
• For the solidification of culture medium of cork oak somatic embryos.
• It may be used for incubation of single antibody-forming cell to investigate the plaque formation.
•  Agar suspension culture may be used for the analysis of cell transformation of palyoma virus.

Agar is a complex gelatinous carbohydrate, and is added to the LB broth (Lysogeny broth, Luria broth, Lennox broth, or Luria-Bertani medium), in order to form gel for bacteria to grow upon. LB Broth is the most widely used nutritionally rich medium, for the culture and growth of bacteria. There are several different formulations of Lb broth, but the composition is generally the same comprising of peptides and casein peptones, trace elements, mineral and vitamins.

Price and Availability

Suggested Laboratory Gloves

Laboratory GlovesThis substance has been tested against several types of hand protection for CE compliance. Click below to find the recommended gloves for handling this product.

Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 


Certificate of Analysis

Protocols & Articles


Microbiology Introduction

An initial aim of all microbiologists is the reproducible growth of their microbial cultures, no matter whether the microorganisms are of natural origin or have been genetically engineered by man. Re...
Keywords: Absorption, Aerobic, Anaerobic, Antibiotics, Antimicrobials, Buffers, Culture media, Diffusion, Environmental, Filtration, Genetic, Growth factors, Metabolism, Phase transitions, Precipitation, Reductions, Respiration, Sample preparations, Vitamins

Peer-Reviewed Papers


Set your institution to view full text papers.
Related Products

Technical Service:

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

Bulk Ordering & Pricing:

Need larger quantities for your development, manufacturing or research applications?