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Merck

56763

Millipore

Agar

high purity, low ionic content, low gel strenght, suitable for microbiology

Synonym(e):

Agar-Agar

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About This Item

Lineare Formel:
(C12H18O9)n
CAS-Nummer:
EG-Nummer:
MDL-Nummer:
UNSPSC-Code:
41106212
NACRES:
NA.85

Qualitätsniveau

Sterilität

non-sterile

Form

powder

Haltbarkeit

limited shelf life, expiry date on the label

Glührückstand

≤4.0%

Verlust

≤10% loss on drying

Trübung

≤8 NTU (after autoclaving)

mp (Schmelzpunkt)

85-95 °C

Übergangstemp.

gel point 34-36 °C

Gelstärke

≥800 g/cm2

Anionenspuren

sulfate (SO42-): ≤2.75%

Kationenspuren

Ca: ≤500 mg/kg
Mg: ≤200 mg/kg

Anwendung(en)

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

InChIKey

GYYDPBCUIJTIBM-DYOGSRDZSA-N

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Allgemeine Beschreibung

Agar is of high purity, low ionic content, and low gel strength 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, which facilitates the formation of distinct colonies and selective isolation of specific microorganisms. Agar is also used in the preparation of 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 dishes, where it can cool and solidify, forming the surface for microbial growth.

Anwendung

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, food and beverage samples.

Hinweis zur Analyse

Toxische Substanzen: abwesend

Lagerklassenschlüssel

11 - Combustible Solids

WGK

WGK 1

Flammpunkt (°F)

Not applicable

Flammpunkt (°C)

Not applicable


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