α - lactose

chemical substances

α - lactose is a chemical substance with molecular formula C12H22O11. α - lactose is supported by crystallization in supersaturated solution below 93.5 ℃.

Chinese name: α - lactose
Foreign name: Lactose Monohydrate
Alias: lactose

CAS: 5989-81-1
Molecular formula: C12H22O11
molecular weight: three hundred and forty-two point two nine six five

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Chinese name: α - lactose

English alias: alpha-D-Glucopyranose, 4-O-beta-D-galactopyranosyl -, monohydrate; alpha Lactose monohydrate; 4-O-beta-D-galactopyranosyl-alpha-D-glucopyranose hydrate (1:1); 4-O-beta-D-galactopyranosyl-beta-D-glucopyranose hydrate; 4-O-beta-D-talopyranosyl-beta-L-talopyranose; 4-O-alpha-L-allopyranosyl-beta-L-talopyranose; 4-O-beta-D-mannopyranosyl-beta-L-talopyranose; 4-O-alpha-L-gulopyranosyl-beta-L-talopyranose

Molecular formula of α - lactose structure

Molecular structure:

Density 1.768g/cm3

Boiling point 667.931 ℃ at 760 mmHg

Flash point 357.752 ℃

Vapor pressure 0mmHg at 25 ℃^[1]

Physicochemical properties

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1. This product is white crystalline particles or powder; Odorless, slightly sweet.

2. This product^[2] Soluble in water, soluble in ethanol , chloroform or Ether Medium insoluble.

3. Identification specific rotation Take this product, dry it at 80 ℃ for 2 hours, accurately weigh it, add water to dissolve and quantitatively dilute it to make a solution containing 0.10g of this product and 0.02ml of ammonia test solution per 1ml, and determine according to the law (Appendix VI E), the specific rotation is+52.0 ° to+52.6 °.

4. Relative density: 1.768g/cm3

purpose

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be used as Analytical reagent Chromatographic analysis reagent, also used for Biology Preparation of culture medium

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