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Sodium Carboxymethyl Cellulose (CMC)

Eco-Certified Sodium Carboxymethyl Cellulose

Sodium Carboxymethyl Cellulose (CMC)

Sodium Carboxymethyl Cellulose (CMC), commonly known as Cellulose Gum, is a water-soluble polyanionic compound derived from cellulose through a series of processes including alkalization, etherification, neutralization, and washing. Renowned for its versatility and cost-effectiveness, CMC is the most widely produced cellulose ether globally.

As a high-performance additive, LANDERCOLL Sodium Carboxymethyl Cellulose is available in food, oil drilling, textile printing, batteries, and papermaking industries.

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LANDERCOLL CMC

LANDERCOLL Chinese Cellulose Ether Manufacturer

Functions and Benefits of Sodium Carboxymethyl Cellulose(CMC)

oil platform in repair

Oil Drilling

  • As a thickening agent, CMC can increase the viscosity of drilling fluids and form a network structure in the mud, thereby enhancing their suspension capacity.
  • CMC can effectively protect the wellbore and manage the penetration and loss of moisture in the drilling fluid.
  • Ultra-high viscosity Sodium Carboxymethyl Cellulose can be used in fracturing fluids, primarily to carry fillers into oil wells.
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Food Industry

  • CMC has good dispersibility and can control the formation of ice crystals, making it suitable for frozen desserts, ice cream, and syrup-based frozen treats.
  • Adding CMC to baked goods can improve the uniformity of the dough and the distribution of ingredients, ensuring that the products remain soft and retain moisture.
  • Sodium Carboxymethyl Cellulose enhances the suspension stability of fruit juices, improving both texture and mouthfeel.
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Delicious fresh bread on wooden background
Bright textile

Textile Printing

  • In the textile industry, CMC is widely used as a sizing agent for various fabrics, including cotton, silk, wool, chemical fibers, and blends.
  • As a thickener and emulsifier, Sodium Carboxymethyl Cellulose allows for the uniform mixing of dyes, high-boiling solvents, and water.
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Paper Making

  • In paper coating, CMC is used to control and adjust the rheology of the coating and the dispersion of pigments, as well as enhance their water retention.
  • Sodium Carboxymethyl Cellulose can serve as a surface sizing agent to reduce the porosity of the paper and improve its resistance to grease.
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Shafts Of Paper-making Machine At Paper Mill. Detail

FREQUENT ASKED QUESTIONS

What is the Solubility Profile of CMC?

CMC exhibits excellent cold-water solubility, forming clear colloidal solutions at concentrations up to 5% w/v. Unlike HPMC or HEC, it remains stable in both acidic (pH 3-12) and high-ionic-strength environments, making it ideal for brine-based systems. Solubility decreases in organic solvents but can be enhanced via sodium salt forms.

How Does CMC Function in Food Applications?

As a GRAS (FDA 21 CFR §182.1745) ingredient, CMC serves multiple roles:

  • Thickener: Achieves 1,000-50,000 mPa·s viscosity (1% solution, 20°C)
  • Stabilizer: Prevents ice crystal growth in frozen desserts
  • Fat Replacer: Mimics mouthfeel in low-fat dairy products
  • Emulsifier: Stabilizes oil-in-water systems in dressings

Can CMC Replace Xanthan Gum in Gluten-Free Baking?

Yes. CMC (DS 0.7-1.2) provides:

  • Superior dough elasticity (30% higher vs. xanthan)
  • Reduced syneresis during baking
  • Cost savings (~40% lower per kg vs. xanthan)

However, combine with 0.1-0.3% guar gum for optimal gas retention.

How to Test CMC Purity?

Key quality metrics:

  1. Degree of Substitution (DS): 0.6-1.5 via titration (ISO 11216)
  2. Viscosity: Brookfield LV/RV at 1-2% concentration
  3. Moisture: ≤8% by Karl Fischer (USP <921>
  4. NaCl Content: ≤0.5% via conductivity

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