Saltar al contenido
Merck
Todas las fotos(3)

Documentos clave

Ver Toda la documentación

448877

Sigma-Aldrich

Quitosano

Chitosan

medium molecular weight

Sinónimos:

Poli(D-glucosamina), Quitina desacetilada

Iniciar sesiónpara Ver la Fijación de precios por contrato y de la organización
Todas las fotos(3)

About This Item

Número de CAS:
9012-76-4
MDL number:
MFCD00161512
UNSPSC Code:
12352201
NACRES:
NA.23
En este momento no podemos mostrarle ni los precios ni la disponibilidad

Quality Level

200

form

powder

viscosity

200-800 cP, 1 wt. % in 1% acetic acid(25 °C, Brookfield)(lit.)

solubility

dilute aqueous acid: soluble

SMILES string

N([C@H]1[C@@H](O[C@@H]([C@H]([C@@H]1O)O[C@@H]4O[C@@H]([C@H]([C@@H]([C@H]4N)O)O[C@@H]5O[C@@H]([C@H]([C@@H]([C@H]5N)O)O[C@@H]6O[C@@H]([C@H]([C@@H]([C@H]6N)O)O[C@@H]7O[C@@H]([C@H]([C@@H]([C@H]7N)O)O[C@@H]8O[C@@H]([C@H]([C@@H]([C@H]8N)O)O[C@@H]9O[C@@H]([C@H](

InChI

1S/C56H103N9O39/c1-87-56(86)65-28-38(84)46(19(10-74)96-55(28)104-45-18(9-73)95-49(27(64)37(45)83)97-39-12(3-67)88-47(85)20(57)31(39)77)103-54-26(63)36(82)44(17(8-72)94-54)102-53-25(62)35(81)43(16(7-71)93-53)101-52-24(61)34(80)42(15(6-70)92-52)100-51-23(60)33(79)41(14(5-69)91-51)99-50-22(59)32(78)40(13(4-68)90-50)98-48-21(58)30(76)29(75)11(2-66)89-48/h11-55,66-85H,2-10,57-64H2,1H3,(H,65,86)/t11-,12-,13-,14-,15-,16-,17-,18-,19-,20-,21-,22-,23-,24-,25-,26-,27-,28-,29-,30-,31-,32-,33-,34-,35-,36-,37-,38-,39-,40-,41-,42-,43-,44-,45-,46-,47-,48+,49+,50+,51+,52+,53+,54+,55+/m1/s1

InChI key

FLASNYPZGWUPSU-SICDJOISSA-N

¿Está buscando productos similares? Visita Guía de comparación de productos

Application

El quitosano puede utilizarse como floculante, en precipitación de proteínas, como agente encapsulante y como espesante acuoso.
Forma geles con aniones multivalentes. Produce disoluciones transparentes que se secan en láminas fuertes y transparentes.

Features and Benefits

Polielectrólito biocompatible, antibacteriano y ecológico con una variedad de aplicaciones entre ellas, el tratamiento del agua, la cromatografía, los aditivos para cosméticos, el tratamiento textil para actividad antimicrobiana, fibras nuevas para textiles, papeles fotográficos, películas biodegradables, productos biomédicos e implantes de microcápsulas para la liberación controlada en la administración de medicamentos.
Polielectrólito biocompatible, antibacteriano y ecológico.

Physical form

Desacetilado al 75 - 85 %

Storage Class

11 - Combustible Solids

wgk_germany

nwg

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

Elija entre una de las versiones más recientes:

Certificados de análisis (COA)

Lot/Batch Number
0000409894
0000375145
0000375145
BCCM4443
BCCL3855

¿No ve la versión correcta?

Si necesita una versión concreta, puede buscar un certificado específico por el número de lote.

Busque por un COA

¿Ya tiene este producto?

Encuentre la documentación para los productos que ha comprado recientemente en la Biblioteca de documentos.

Visite la Librería de documentos

Arnout Mieremet et al.
PloS one, 12(3), e0174478-e0174478 (2017-03-24)
Full thickness human skin models (FTMs) contain an epidermal and a dermal equivalent. The latter is composed of a collagen dermal matrix which harbours fibroblasts. Current epidermal barrier properties of FTMs do not fully resemble that of native human skin
Mohammad Amin Shamekhi et al.
International journal of biological macromolecules, 127, 396-405 (2019-01-10)
Enhancement of physical and mechanical properties of the scaffolds is achieved via various methods including cross-linking and incorporation of nano particles. In the present research chitosan-based scaffolds firstly were reinforced with the incorporation of the graphene oxide (GO) nanoparticles. The
Viviana Vergaro et al.
International journal of biological macromolecules, 99, 187-195 (2017-02-25)
Carbohydrate polimeric microcapsules were assembled using a LbL approach onto a CaCO
Lana Glerieide Silva Garcia et al.
Carbohydrate polymers, 195, 662-669 (2018-05-29)
Difficulties in the treatment of Candida spp. invasive infections are usually related to the formation of biofilms. The aim of this study was to determine the effects of molecular weight (MW) of chitosan (using high (HMW), medium (MMW) and low
Paulo V O Toledo et al.
International journal of biological macromolecules, 123, 1180-1188 (2018-11-24)
Xanthan gum (XG) was applied for the creation of hydrophilic, hydrophobic and layered cryogels. Firstly, the correlation among synthesis parameters, such as solvent composition and polymer concentration (Cp) in the precursor gel and mold diameter (Φ), with physicochemical properties and
Ver todos los artículos relacionados

Artículos

Preparation of Chitosan Microparticles by Spray Drying

Carcinogenic compounds in elastomers: 1,3-butadiene and isoprene used in elastomer manufacturing, classified as carcinogenic by IARC.

Preparation of Chitosan Microparticles by Spray Drying

Carcinogenic compounds in elastomers: 1,3-butadiene and isoprene used in elastomer manufacturing, classified as carcinogenic by IARC.

Chitosan in Pharmaceutical Applications

Polymers, natural or synthetic, are vital in medical advancements, contributing to device and pharmaceutical development in therapy.

Chitosan in Pharmaceutical Applications

Polymers, natural or synthetic, are vital in medical advancements, contributing to device and pharmaceutical development in therapy.

Ver todo
1 Review This action will navigate to reviews.

Questions

1–10 of 14 Questions  

  1. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

      Helpful?

  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

      Helpful?

  3. Is the chitosan produced starting from shrimp shells that are sourced as waste from the food industry, or are these shrimps specifically farmed for chitosan production?

    1 answer

    1. The shrimp sourced to produce this item are harvested in Iceland specifically for use in chitosan production.

      Helpful?

  4. What is the purity of chitosan?

    1 answer

    1. The minimum purity of this product is 75%. Purity is determined on a lot-specific basis.

      Helpful?

  5. Could you please provide us the chemical formula of this chitosan compound?

    1 answer

    1. Chitasan is a biopolymer with a base molecular formula of C12H24N2O9. This particular product is a medium molecular weight option with a range of 190,000-310,000 Da.

      Helpful?

  6. Do you perform a chemical or enzymatic deacetylation on Chitin to obtain Chitosan? Which chemical or enzyme do you employ?

    1 answer

    1. Unfortunately, the deacetylation method is considered proprietary.

      Helpful?

  7. Which Chitosan has the highest quality, for research or for cosmetic purposes?

    1 answer

    1. Unfortunately, none of the Chitosan products currently offered are suitable for cosmetic purposes.

      Helpful?

  8. What is the polydispersity of medium molecular weight chitosan, product 448877?

    1 answer

    1. Unfortunately, the polydispersity is not determined for for this item.

      Helpful?

  9. This medium molecular chitosan is from crab or shrimp? Or other way to produce?

    1 answer

    1. This chitosan is from Pandalus Borealis (shrimp).
      Please see the sample Certificate of Origin for more information: https://www.sigmaaldrich.com/coo/undefined/448877/*

      Helpful?

  10. What is deacetilation degree of this product?

    1 answer

    1. The deacetylation specification for this product is >/= 75 %. This value is reported in the lot specific Certificate of Analysis. Please see the sample Certificate of Analysis to review a typical test result: https://www.sigmaaldrich.com/certificates/sapfs/PROD/sap/certificate_pdfs/COFA/Q14/448877-BULKBCCK4007.pdf

      Helpful?

1–10 of 14 Questions  

Reviews

Active Filters

  1. 1 Ratings-Only Review

Nuestro equipo de científicos tiene experiencia en todas las áreas de investigación: Ciencias de la vida, Ciencia de los materiales, Síntesis química, Cromatografía, Analítica y muchas otras.

Póngase en contacto con el Servicio técnico