1.origin: red alga

2.preparation: monomers of agar oligosaccharide are made from agar, and obtained by enzymatic hydrolysis, chemical derivatization and column chromatography, including neoagar sodium salts and agar sodium salts.

3.character: they are light yellow power or flocculent lyophilized things, with odor free and humidifying.

4.toxicity: non-toxic

5.shelf life: 3 years under frozen state

6.inspection: tlc, hpgpc, esi-ms

7.application: agar oligosaccharide standards can be developing agar oligosaccharide’s applications in pharmaceuticals, foods, modern agriculture, feed, daily chemical industry and biochemical reagents. they are reference substances in assay, analysis and quality control. they could also be applied in research fields of carbohydrate chemistry and glycobiology, such as preparation of oligosaccharide microarray, the interaction between oligosaccharide and protein, and structure-activity relationship and mechanism of oligosaccharide-derived medicine.