L-rhamnose, also known as 6-deoxy-L-mannose or L-isotretinoin, is an organic compound with a wide range of applications in several fields. The following is a detailed introduction to L-rhamnose:
1. Basic Information
Molecular formula: C6H12O5 (but note that its hydrate C6H14O6 is also more common)
Molecular weight: 164.16 anhydrous, 182.17 monohydrate.
CAS No.: 6155-35-7 (anhydrous), 10030-85-0 (monohydrate)
Appearance: white crystalline powder
Solubility: soluble in water, slightly soluble in ethanol, insoluble in ether organic solvents.
2. Chemical Properties
Reducibility: L-rhamnose has certain reducibility, oxidized by bromine water can generate rhamnous acid, oxidized by nitric acid to generate L-arabinitrilotrihydroxyglycolic acid. Sodium amalgam reduces to rhamnitol.
3. The existence of forms and sources
Existence form: L-rhamnose to free sugar, glycosides, polysaccharides and other forms widely exist in plants, especially in plant cell wall pectin polysaccharide, rhamnose galacturonic acid glycans and other components. It is also a constituent component of bacterial polysaccharides and is present on the surface of Gram-negative and Gram-positive bacteria.
Source: L-rhamnose can be extracted from a variety of plants and bacteria, for example, from the sweet orange peel, bark and flowers and other ligands contained in the rutinoside and rue glycosides after hydrolysis to isolate the saccharide part and then refined.
4. Uses
Food industry: The sweetness of L-rhamnose is 33% of that of sucrose, it can be used as sweetener and food additives, used in the processing of high-grade coffee, beverages, bread, meat products and so on. It can also be used in the production of flavors and fragrances.
Biochemical research: L-rhamnose also has a wide range of applications in glycochemical and biochemical research.
Biological activity: L-rhamnose cannot be directly absorbed by the human body, but it can be fermented by intestinal flora, which helps to promote digestion and enhance immunity. In addition, it also has biological activities such as assisting in lowering blood sugar and antioxidant.
5. Precautions
L-rhamnose has a certain degree of hygroscopicity, need to pay attention to moisture when preserved.
For special groups such as pregnant women, lactating women, etc., need to be careful when using L-rhamnose to avoid causing adverse reactions.