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Agar, Granulated, purified and free from inhibitors, suitable for microbiology

Typical Properties
CAS 9002-18-0
Catalog ACM9002180-15
Molecular Weight 336.33 g/mol
Melting Point 90 °C
Solubility Slightly soluble 20 g/L
Appearance Solid
Storage 15-25 °C
Biological Source Algae
Color Brownish yellow
Composition (C12H18O9)n
EC Number 232-658-1
Grade Reagent Grade
MDL Number MFCD00081288
pH 6.8 (20 °C, 100 g/L in H2O)
Precautions for use Typical working concentration: 6-12 g/L.
Quality Level 200
Shipping Ambient
Stability Stable. Incompatible with strong oxidizing agents.
Overview
Description

Agar is a galactose-based heteropolysaccharide derived from red algae. It is a heterogeneous polysaccharide composed of agarose and agarose polymers. A typical agar composition is 70% agarose and 30% agarose. Agarose is a linear (no branch point) polysaccharide composed of repeating galactobiose. Agar gels are more diverse in composition, containing D and L isomers of galactose, with sulfate and pyruvate substituents that give the polymer a strong negative charge. Agar is the most widely known growth medium for microbial identification and enumeration. Agar gels are reversible (melt at 85°C and solidify at 32-40°C) and translucent. The properties of agar are similar to gelatin. It is a good substitute for animal-based gelatin in vegan foods. Agar is also a polymer used to make dental impressions.

Features

·High gel strength
·Strong coagulation force
·Low bleeding
·Good stability

Application

·Used as food thickener, silk sizing agent, laxative
·Adhesives, thickeners and capsules for pharmaceuticals
·As bacterial culture medium, immobilized enzyme carrier, bacterial encapsulation material and electrophoresis medium
·For filtration separation of viruses, subcellular particles and macromolecules
·For observation of serum antigens or antibodies