D-cellobiose / cellobiose /4-o- β- D-glucopyranosyl-d-glucose /4- β- D-glucopyranosyl-d-glucose

English name：D-cellbiose；D-(+)-Cellobiose；4-beta-D-Glucopyransoyl-D-glucopyranose

Other names: cellobiose; 4-O- β- D-glucopyranosyl-d-glucose; Cellulose disaccharide; 4- β- D-glucopyranosyl-d-glucose

CAS No.: 528-50-7

C12H22O11=342.30

Grade: br

Content: ≥ 98.0%

Specific rotation: +33 ~ +36 º (c=1, H2O)

Water dissolution test: qualified

Melting point: 235 ~ 240 ℃

Physicochemical properties: white crystalline powder, formed from dilute ethanol, containing 1/4 to 1/2 molecules of crystalline water after vacuum drying. It can reduce ferring's solution. In case of acid or bitter almond enzyme, it will hydrolyze to form 2 molecules β- D-glucose. It is not fermented in Saccharomyces cerevisiae, maltase or sucrase. 1g is soluble in 8ml water and 1.5ml boiling water, and almost insoluble in absolute ethanol and ether

Purpose: biochemical research. A disaccharide of maltose type. It is composed of two molecules of dextrose, which can reduce h.van Fehling reagent and hydrolyze it with acid to obtain two molecules of glucose. It is a constituent unit of cellulose and does not exist in free state in nature

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