Applications and Properties of Sodium Carboxymethyl Cellulose

Wolff Cellulosics is one of the major producers of purified and highly purified sodium carboxymethyl cellulose (CMC).

Our products are marketed under the brand names of Walocel® CRT A - Cellulose Gum and Walocel® CRT in more than 70 countries around the world.

As derivatives of a naturally occurring raw material and with their high degree of purity, our CMC products are ideal for a wide range of applications.

The product series are known for their high purity and consistent quality. They are produced using cutting edge technology and are constantly monitored in accordance with quality assurance procedures.

Applications

CMC is used as a highly effective additive to improve the product and processing properties in various fields of application - from foodstuffs, cosmetics and pharmaceuticals to products for the paper and textile industries.

Building material additives, printing inks, coatings, pharmaceuticals, food, cosmetics, paper or textiles – there’s a long and growing list of applications. Special-purpose cellulose derivatives produced by Wolff Cellulosics provide invisible yet indispensable benefits in countless everyday products.

Fields of Application

Our cellulosic products perform all kinds of different functions in the various fields of application. Their capabilities include:

  • Water retention
  • Gelling
  • Emulsifying
  • Suspending
  • Absorbing
  • Stabilising
  • Bonding
  • Forming films

Walocel® CRT-A - Sodium Carboxymethyl Cellulose

Walocel® CRT A - Cellulose Gum is the series of high-purity sodium carboxymethyl cellulose (CMC) products supplied by Wolff Cellulosics to the food, cosmetics and pharmaceuticals industries.

With a guaranteed degree of purity of at least 99.5%, Walocel® CRT A - Cellulose Gum meets all regulatory requirements for use in foodstuffs, cosmetics and pharmaceuticals.

Walocel® CRT A - Cellulose Gum is produced in compliance with GMP guidelines and is certified accordingly. All Walocel® CRT A - Cellulose Gum products are manufactured in accordance with a HACCP concept.

Walocel® CRT A - Cellulose Gum can be defined by:

  • The viscosity of its aqueous solutions,
  • The average degree of substitution (DS) of carboxyl groups and
  • Its’ granulometry, i.e. particle size or grain size.

Walocel® CRT A - Cellulose Gum is high-purity sodium carboxymethyl cellulose. CMC is a cellulose-based anionic polymer which is soluble in either hot or cold water.

Properties of Walocel® CRT-A – Sodium Carboxymethyl Cellulose

Walocel® CRT A - Cellulose Gum products are:

  • White to slightly yellowish powders or granulates
  • Physiologically inert
  • Of maximum purity
  • Microbe-free
  • Neutral taste and smell
  • Completely soluble

The product range comprises viscosity from 30 mPa·s up to 60,000 mPa·s as a 2% aqueous solution. This corresponds to 30 mPa·s as a 2% solution up to 2000 mPa·s as a 0,5% solution.

Property

Rating

Ion activity

anionic

Surface activity

very low, non-foaming

Solubility

in water at any temperature

Water retention

good (pH-dependent)

Effect of temperature on the solution

viscosity drops as temperature rises

Effect of pH

drop in viscosity in the ranges pH < 3.5 and pH > 12

Effect of monovalent metal ions

minor

Effect of polyvalent metal ions

flocculation possible

Film formation

good to very good film-forming properties

Applications of Walocel® CRT-A - Sodium Carboxymeythyl Cellulose

Used in aqueous systems in the food, pharmaceutical and cosmetics sector, Walocel® CRT A - Cellulose Gum is ideal for:

  • Stabilising
  • Binding
  • Thickening
  • Emulsifying
  • Suspending
  • Absorb or retain water

Walocel® CRT A - Cellulose Gum films are resistant to oils, fats and organic solvents. By using Walocel® CRT A - Cellulose Gum you can precision-regulate the rheological (flow) properties of your application system, and therefore ensure that it performs perfectly in the actual processing conditions.

Walocel CRT – Sodium Carboxymethyl Cellulose

Walocel® CRT was developed for technical applications. Walocel® CRT has a minimum degree of purity of 98%.

Apart from standard powder grades, this product line also includes Walocel® CRT.PV grades with delayed solubility.

Properties of Walocel® CRT - Sodium Carboxymethyl Cellulose

Walocel® CRT can be defined by:

  • The viscosity of its aqueous solutions
  • The average degree of substitution (DS) of carboxyl groups
  • Its granulometry, i.e. particle size or grain size

Walocel® CRT is a purified sodium carboxymethyl cellulose. CMC is a cellulose-based anionic polymer which is soluble in either hot or cold water.

Walocel® CRT products are:

  • White to slightly yellowish powders or granulates
  • Of high purity
  • Completely soluble

The product range comprises viscosity from 10 mPa·s up to 30,000 mPa·s as a 2% aqueous solution. This corresponds to approx. 50 mPa·s as a 4% solution up to 4.000 mPa·s as a 1% solution.

Property

Rating

Ion activity

anionic

Surface activity

very low, non-foaming

Solubility

in water at any temperature

Water retention

good (pH-dependent)

Effect of temperature on the solution

viscosity drops as temperature rises

Effect of pH

drop in viscosity in the ranges pH < 3.5 and pH > 12

Effect of monovalent metal ions

minor

Effect of polyvalent metal ions

flocculation possible

Film formation

good to very good film-forming properties

Applications of Walocel® CRT-A - Sodium Carboxymeythyl Cellulose Gum

Used in aqueous systems, Walocel® CRT is ideal for

  • Stabilising
  • Binding
  • Thickening
  • Emulsifying
  • Suspending
  • Absorb or retain water in technical applications

Walocel® CRT films are resistant to oils, fats and organic solvents. By using Walocel® CRT you can precision-regulate the rheological (flow) properties of your application system, and therefore ensure that it performs perfectly in the actual processing conditions.

This information has been sourced, reviewed and adapted from materials provided by Covetro.

For more information on this source, please visit Covestro.

Citations

Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    Covestro. (2019, October 30). Applications and Properties of Sodium Carboxymethyl Cellulose. AZoM. Retrieved on April 01, 2020 from https://www.azom.com/article.aspx?ArticleID=2788.

  • MLA

    Covestro. "Applications and Properties of Sodium Carboxymethyl Cellulose". AZoM. 01 April 2020. <https://www.azom.com/article.aspx?ArticleID=2788>.

  • Chicago

    Covestro. "Applications and Properties of Sodium Carboxymethyl Cellulose". AZoM. https://www.azom.com/article.aspx?ArticleID=2788. (accessed April 01, 2020).

  • Harvard

    Covestro. 2019. Applications and Properties of Sodium Carboxymethyl Cellulose. AZoM, viewed 01 April 2020, https://www.azom.com/article.aspx?ArticleID=2788.

Ask A Question

Do you have a question you'd like to ask regarding this article?

Leave your feedback
Submit