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05039

Agar

Name: Agar
Brand: SIAL

suitable for microbiology

Synonym(s):

Agar-agar, Gum agar

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About This Item

Linear Formula:

(C₁₂H₁₈O₉)_n

CAS Number:

9002-18-0

eCl@ss:

42040102

UNSPSC Code:

41106212

NACRES:

NA.74

EC Number:

232-658-1

MDL number:

MFCD00081288

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Properties

sterility

non-sterile

Quality Level

100

form

powder

shelf life

limited shelf life, expiry date on the label

packaging

pkg of 50 g, pkg of 500 g

storage condition

(Tightly closed)

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: 1.5% at 70 °C, clear to very faintly turbid, almost colorless

application(s)

agriculture, microbiology

InChI

1S/C14H24O9/c1-5-8(16)13-11(7(21-5)4-20-13)23-14-10(18)12(19-2)9(17)6(3-15)22-14/h5-18H,3-4H2,1-2H3/t5?,6-,7?,8-,9+,10-,11?,12+,13+,14?/m1/s1

InChI key

GYYDPBCUIJTIBM-DYOGSRDZSA-N

Description

General description

Agar is widely used in microbiology as a solidifying agent in microbial culture media. It is a polysaccharide derived from seaweed and is primarily composed of agarose. Agar is a mostly inert substance, which makes it an ideal material for microbial culture media because it doesn’t interfere with the growth of microorganisms. Agar can solidify media, allowing microorganisms to grow in a solid environment, facilitating the formation of distinct colonies and selective isolation of specific microorganism. Agar is also used to prepare selective and differential media, which can provide additional nutrients or other chemical substances to promote or inhibit the growth of specific microorganisms selectively. Agar is sterilized by autoclaving and then poured into Petri dishesto cool and solidify, forming the surface for microbial growth.

Application

Agar is commonly used as a solidifying agent in many microbial culture media for the growth and identification of bacteria, yeasts, and molds from various pharmaceutical, environmental, and food and beverage samples.

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Storage Class

11 - Combustible Solids

wgk

WGK 1

ppe

Eyeshields, Gloves, type N95 (US)

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Articles

Base Ingredients of Microbiology Media

Culture media provides a habitat with suitable nutrients, energy sources, and certain environmental conditions for the growth of microorganisms. The components of the culture media range from simple sugars to peptones, salts, antibiotics, and complex indicators.

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Journal of Experimental Botany, 53 (373), 1445-1452 (2002)

Hijacking membrane transporters for arsenic phytoextraction.

Melissa S LeBlanc et. Al.

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Global Trade Item Number

SKU	GTIN
199540-25G	04061838763303
199540-5G	04061838763310
05039-500G	04061835571314
05039-50G	04061838636393
05039-5KG	04061832578569