L-rhamnose /6-deoxy-l-mannose / methylpentose /l-isosweet alcohol /l- (+) - rhamnose

English Name: l (+) -rhamnose monohydrate; 6-Deoxy-L(+)-mannose

Other names: 6-deoxy-l-mannose; Methyl pentose; L-isosweet alcohol; L- (+) - rhamnose; 6-deoxy-l-glucomannan monohydrate

CAS No.: 10030-85-0

C6H12O5•H2O=182.17

Grade: high purity grade

Content: ≥ 98.0%

Specific rotation: +7.5 º ~ +8.5 º

Melting point: 90 ~ 92 ℃

Burning residue: ≤ 0.15%

Heavy metals: ≤ 5ppm

Calcium salt: ≤ 10ppm

Physicochemical properties: white crystalline powder, a derivative of mannose whose hydroxyl at position 6 is replaced by hydrogen, namely 6-deoxy-l-mannose. It is soluble in water and methanol, slightly soluble in ethanol, and its crystallization takes two forms, α  Type and β  Type. α  Type A contains a molecule of crystal water. After heating, it loses crystal water and turns into β  Type (molecular weight: 164.16); β  Type A is easily hygroscopic, and changes into α  Type. Common ones are α- L-rhamnose, sweet, exists in the form of pyran in aqueous solution. It is reductive. It is oxidized with bromine water to form rhamnoic acid, and then oxidized with nitric acid to form l-arabinoxygeranic acid. Rhamnol was obtained by reduction with sodium amalgam. Its sweetness is 33% of sucrose

Purpose: biochemical research. It can be used to measure intestinal permeability and can be used as a sweetener

Save: RT, away from light