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419338

Sigma-Aldrich

Sodium carboxymethyl cellulose

average Mw ~700,000

Synonym(s):

Carboxymethylcellulose sodium salt

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About This Item

CAS Number:
9004-32-4
MDL number:
MFCD00081472
UNSPSC Code:
12162002
NACRES:
NA.23
Pricing and availability is not currently available.

form

powder

autoignition temp.

698 °F

mol wt

average Mw ~700,000

extent of labeling

0.9 carboxymethyl groups per anhydroglucose unit

mp

270 °C (dec.)

SMILES string

[Na].OC(C(O)C(O)C=O)C(O)CO.OC(=O)C

InChI

1S/C6H12O6.C2H4O2.Na/c7-1-3(9)5(11)6(12)4(10)2-8;1-2(3)4;/h1,3-6,8-12H,2H2;1H3,(H,3,4);

InChI key

DPXJVFZANSGRMM-UHFFFAOYSA-N

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General description

Sodium carboxymethyl cellulose (CMC) is a water dispersible sodium salt of carboxy-methyl ether of cellulose that forms a clear colloidal solution. It is a hygroscopic material that has the ability to absorb more than 50% of water at high humidity. It is also a natural polymeric derivative that can be used in detergents, food and textile industries.[1][2]

Application

CMC can be used as a binder in the preparation of graphene nano-platelet based inks for the fabrication of dye sensitized solar cells (DSSCs).[3] It can also be used as a viscosity enhancer in the development of tyrosinase based inks for the formation of electrodes for biosensor applications.[4] CMC is used as a support material for a variety of cathodes and anodes for microbial fuel cells.[5]

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
MKCW0822
MKCT7348
MKCV3220
MKCR3903
MKCS2492

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Amélie Béduer et al.
Advanced healthcare materials, 4(2), 301-312 (2014-09-03)
Millimeter to centimeter-sized injectable neural scaffolds based on macroporous cryogels are presented. The polymer-scaffolds are made from alginate and carboxymethyl-cellulose by a novel simple one-pot cryosynthesis. They allow surgical sterility by means of autoclaving, and present native laminin as an
Printed and flexible biosensor for antioxidants using interdigitated ink-jetted electrodes and gravure-deposited active layer
Pavinatto FJ, et al.
Biosensors And Bioelectronics, 67(3), 553-559 (2015)
Handbook of pharmaceutical granulation technology (2016)
Platinum-free, graphene based anodes and air cathodes for single chamber microbial fuel cells
Call TP, et al.
Journal of Material Chemistry A, 5(45), 23872-23886 (2017)
Development of Graphene Nano-Platelet Ink for High Voltage Flexible Dye Sensitized Solar Cells with Cobalt Complex Electrolytes
Baker JA, et al.
Advanced Engineering Materials, 19(3), 1600652-1600652 (2017)
View All Related Papers

Questions

1–4 of 4 Questions  

  1. 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

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  2. 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

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  3. Is this compound suitable for In vivo work?

    1 answer

    1. This product has not been tested for in vivo or in vitro use. However, based on a review of the peer-reviewed papers, this material has been used in animal models. Please see the link below to review this publication: https://onlinelibrary.wiley.com/doi/10.1002/adhm.201400250

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  4. I am trying to buy CMC that is the same as the one used in batteries, but I am not sure how the Molecular weight would affect its properties. would it matter if it was high or low?

    1 answer

    1. Carboxymethyl Cellulose Sodium serves as a binder for electrode materials in batteries. The molecular weight is irrelevant as long as all the components (active material, binder, conductive agent) can be immobilized on the current collector without obvious agglomeration or exfoliation. One reference suggested that lower molecular weight CMC produced 'lower charge transfer resistance, higher ion conductivity, better wettability with the electrolyte, and better Li+ mobility as LIB binder.' Should a lower molecular weight material be of interest, see CMC product 419274, average Mw ~90,000. See the links below to review this product page as well as the reference cited above.

      419273, Sodium Carboxymethyl cellulose
      https://www.sigmaaldrich.com/product/aldrich/419273

      Assembly and electrochemical testing of renewable carbon-based anodes in SIBs: A practical guide
      https://www.sciencedirect.com/science/article/pii/S209549562200479X

      Sodium carboxymethyl cellulose as a potential binder for hard-carbon negative electrodes in sodium-ion batteries
      https://www.sciencedirect.com/science/article/pii/S1388248114001209

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