05039

Gélose

suitable for microbiology

• Synonyme(s) : Agar, Agar-agar
• Formule linéaire : (C₁₂H₁₈O₉)_n
• Numéro CAS: 9002-18-0
• Numéro CE : 232-658-1
• Numéro MDL: MFCD00081288
• Code UNSPSC : 41106212
• eCl@ss : 42040102
• Nomenclature NACRES : NA.74

Propriétés

• Stérilité: non-sterile
• Niveau de qualité: 100
• Forme: powder
• Durée de conservation: limited shelf life, expiry date on the label
• Conditionnement: pkg of 50 g; pkg of 500 g
• Conditions de stockage: (Tightly closed)
• Résidus de calcination: ≤5%
• Perte: ≤12% loss on drying
• pH: 6-7.5 (1.5%after autoclaving)
• Pf: 85-95 °C
• Température de transition: gel point 33-37 °C (1.5% solution, after autoclaving)
• Résistance du gel: >800 g/cm² (1.5% gel, Nikkan, after autoclaving)
• Solubilité: 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
• Clé InChI: GYYDPBCUIJTIBM-DYOGSRDZSA-N

Description

Description générale

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.

Informations sur la sécurité

• Code de la classe de stockage: 11 - Combustible Solids
• Classe de danger pour l'eau (WGK): WGK 1
• Équipement de protection individuelle: Eyeshields, Gloves, type N95 (US)