??? ??

??? MSDS

Chitosan

??? C??? ??, ??, ??

??

?? ??, ?? ? ???? ??? ?? ??? ??? ?? ??? ???? ?? ????? ?? ??? ???? 1811? ???? ??? ?? ????? ???? ??? ??? ?? ???? 1859? ??? ??? ??? ??????? ??? ?? 1894?? ??? ?? ???? ? ??? ????? ????. ????? ???, ????? ?? ??? ???? ??? ?? ?? ??? ???? ???.

??

????? ?????? ???? ??? ??. ??? ??? ?? ?????? ??, ???? ?? ? ?????? ??? ??. ?? ??? ?? ? ????? ? ??? ??? ?? ????? ??? ? ??. ?? ? ??? ??? ???? ?? ??? ??? ???? ? ?? ??? ?? ??? ??? ??? ??? ???? ? ??? ??? ??? ???? ??? ??. ?? ??. ?? ? ??? ?? ??? ? ??? ?? ?? ???? ?? ? ??? ??? ??, ????? ??, ?? ?? ??, ? ?? ??, ???? ?? ??? ??? ??? ???.

????

  (1) ?? : ? ??? ?????? ?? ??? ?, ? ?? 4.0ppm ????? ??.

  (2) ? : ? ?? 5.0g? ??? ??????? ?? ?????????????? ?? ??? ?, ? ?? 10.0ppm ????? ??.

  (3) ?????? : ? ??? ??? ?? 0.5g? ??? ?? 5v/v% ??? ?? ??? 100mL? ?? ?????? ??. ? ????? ???? 1mL? 200mL ??????? ??? ?? ? 30mL? ??? ????? ?? ?????? 0.1% ???????? 2～3??? ???? 0.0025N ???????????? ???? ?? ???? ?? ??????? ?? ?, ? ?? 70.0% ????? ??.

??????(%) ＝X/161/(X/161 ＋ Y/203)×100

X =1/400×1/1.000×f × 161×v

Y =0.5×0.01 - X

v : 0.0025N ?????????? ???(mL)

f : 0.0025N ?????????? ?????

????

? ? ?? 0.2g? ????? 5mL ? ? 1mL? ??? ????? ??? ?, ?? ?～??? ????.

??

???? ?? ? ??? ??? ??????? ???? ???? ? ??? ???????(polyglucosamine)??.

?????

? ? ??? ???? ???? ????????? ?? ??? ?, ? ?? 5% ????? ??.

??? ??

Chitosan occurs as odorless, white or creamy-white powder or flakes. Fiber formation is quite common during precipitation and the chitosan may look ‘cottonlike’.

??

Chitosan comes from the shell of marine crustaceans.

??

Forms gels with multivalent anions. Gives clear solutions that dry to strong, clear films.Flocculant, protein precipitation, encapsulating agent and aqueous thickener.
Chitosan is a natural polycationic linear polysaccharide derived from chitin. The low solubility of chitosan in neutral and alkaline solution limits its application.
Chitosan: An Update on Potential Biomedical and Pharmaceutical Applications

?? ??

Chitosan is manufactured commercially by chemically treating the shells of crustaceans such as shrimps and crabs. The basic manufacturing process involves the removal of proteins by treatment with alkali and of minerals such as calcium carbonate and calcium phosphate by treatment with acid. Before these treatments, the shells are ground to make them more accessible. The shells are initially deproteinized by treatment with an aqueous sodium hydroxide 3–5% solution. The resulting product is neutralized and calcium is removed by treatment with an aqueous hydrochloric acid 3–5% solution at room temperature to precipitate chitin. The chitin is dried so that it can be stored as a stable intermediate for deacetylation to chitosan at a later stage. NDeacetylation of chitin is achieved by treatment with an aqueous sodium hydroxide 40–45% solution at elevated temperature (1108℃), and the precipitate is washed with water. The crude sample is dissolved in acetic acid 2% and the insoluble material is removed. The resulting clear supernatant solution is neutralized with aqueous sodium hydroxide solution to give a purified white precipitate of chitosan. The product can then be further purified and ground to a fine uniform powder or granules. The animals from which chitosan is derived must fulfil the requirements for the health of animals suitable for human consumption to the satisfaction of the competent authority. The method of production must consider inactivation or removal of any contamination by viruses or other infectious agents.

benefits

Chitosan is a fibrous substance that might reduce how much fat and cholesterol the body absorbs from foods. It also helps blood clot when applied to wounds.

?? ??

Chitosan is a linear amino polysaccharide composed of approximately 20% β1,4-linked N-acetyl-D-glucosamine (GlcNAc) and approximately 80% β1,4-linked D-glucosamine (GlcN) that is prepared by the partial deacetylation of chitin in hot alkali.

Pharmaceutical Applications

Chitosan is used in cosmetics and is under investigation for use in a number of pharmaceutical formulations. The suitability and performance of chitosan as a component of pharmaceutical formulations for drug delivery applications has been investigated in numerous studies. These include controlled drug delivery applications, use as a component of mucoadhesive dosage forms, rapid release dosage forms, improved peptide delivery, colonic drug delivery systems, and use for gene delivery. Chitosan has been processed into several pharmaceutical forms including gels, films, beads, microspheres, tablets, and coatings for liposomes. Furthermore, chitosan may be processed into drug delivery systems using several techniques including spray-drying, coacervation, direct compression, and conventional granulation processes.

Safety

Chitosan is being investigated widely for use as an excipient in oral and other pharmaceutical formulations. It is also used in cosmetics. Chitosan is generally regarded as a nontoxic and nonirritant material. It is biocompatible with both healthy and infected skin. Chitosan has been shown to be biodegradable.
LD₅₀ (mouse, oral): >16 g/kg

??

Chitosan powder is a stable material at room temperature, although it is hygroscopic after drying. Chitosan should be stored in a tightly closed container in a cool, dry place. The PhEur 6.5 specifies that chitosan should be stored at a temperature of 2–88℃.

? ???

Chitosan is incompatible with strong oxidizing agents.

Regulatory Status

Chitosan is registered as a food supplement in some countries.

??? ?? ?? ? ???

???

?? ??

??? ?? ??

???	??	???	??	?? ?	??
Shaanxi Pioneer Biotech Co., Ltd .	029-84385017; +8613259417953	sales@pioneerbiotech.com	China	1287	58
Xi'an ZB Biotech Co.,Ltd	+86-18591943808	sales01@xazbbio.com	China	815	58
Baoji Guokang Healthchem co.,ltd	+8615604608665 15604608665	dominicguo@gk-bio.com	CHINA	9414	58
Hefei TNJ Chemical Industry Co.,Ltd.	+86-0551-65418684 +86-18949823763	sales@tnjchem.com	China	25356	58
Maanshan Tiantai Biotechnology Co., Ltd.	+86-0555-8889890 +86-17356584060	GM@tiantaibio-tech.com	China	72	58
Junwee Chemical co., Ltd.	+86-571-85808636 +86-13958122542	sales@junweechem.com	China	823	58
BINBO BIOLOGICAL CO.,LTD	+8618629063126	info@binbobiological.com	China	480	58
Hebei Chuanghai Biotechnology Co., Ltd	+86-15350571055	Sibel@chuanghaibio.com	China	8738	58
RongNa Biotechnology Co.,Ltd	+86-86-13583358881 +8618560316533	Brad@rongnabiotech.com	China	3375	58
Wuhan Fortuna Chemical Co., Ltd	+86-27-59207850	info@fortunachem.com	China	6001	58

??? ?? ??: