MilliporeSigma
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A1296

Sigma-Aldrich

Agar

microbiology tested, suitable for plant cell culture, suitable for cell culture, powder

Synonym(s):
Agar-agar, Gum agar
Linear Formula:
(C12H18O9)n
CAS Number:
EC Number:
MDL number:
eCl@ss:
42040102
NACRES:
NA.21

biological source

algae (Rhodophyceae)

Quality Level

form

powder

technique(s)

cell culture | mammalian: suitable
cell culture | plant: suitable

transition temp

congealing temperature <38 °C (1.5% in H2O)

suitability

microbiology tested

application(s)

agriculture
microbiology

storage temp.

room temp

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General description

Agar chemically consists of two fractions: agarose, a neutral polymer of high gel strength and agaropectin, a non-gelling fraction with sulfated β-1,3-glycosidically linked D-galactose units.
Agar is a hydrophilic colloid obtained from marine algae (Rhodophyceae). It is soluble in boiling water and is of significance to the microbiological area.

Application

Agar has been used in the plant growth media.
Typical working concentration: 6-12g/L.
Agar has been used:
  • as a reference standard commercial agar to compare the physio-chemical, gelling properties of alkali-treated agar from Gracilaria tenuistipitata
  • as a component in the seed germination medium and rooting medium for commercially available soybean (Glycine max (L.) Merr) seeds
  • as a component of growth media for B. subtilis mutant strain MTC871 based biofilm colonies
  • as a bacteriological agar component to prepare half strength Murashige-Skoog (MS 50%) medium for Echinocactus platycanthus seeds culture

Packaging

100, 500 g in poly bottle
1 kg in poly bottle
5, 10, 25 kg in poly drum

Biochem/physiol Actions

Agar is gel forming polysaccharide used as a gelling and stabilizing agent. Its serves as a cryoprotectant in processed foods, pharmaceuticals and cosmetics products.

Other Notes

General purpose agar.

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

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Certificate of Origin

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