Detergent Grade CMC: Properties, Selection and Trial Checks

SINO-CMC August 12, 2022 2:28 pm

Detergent grade sodium carboxymethyl cellulose (CMC) is used in washing formulations to help control soil redeposition and, in suitable liquid systems, adjust viscosity and suspension. The right grade depends on the detergent format, formula composition and manufacturing process.

This article explains the properties to evaluate when choosing CMC. For available product information and documents, see SINOCMC detergent grade CMC.

What does CMC do in detergent?

A key function is anti redeposition: helping reduce the transfer of dispersed soil back onto fabric during washing. This should be evaluated with the intended fabrics, water quality, soil load and wash conditions. CMC is an additive within the detergent system; its effect cannot be judged independently of the surfactants and other ingredients.

In compatible liquid or paste formulations, CMC can also provide thickening and help keep dispersed ingredients more uniformly distributed. The finished viscosity and storage behaviour depend on the complete formulation, not simply the viscosity printed on the CMC specification.

Powder detergent and liquid detergent need different checks

Powder detergent

Check how CMC is incorporated into the manufacturing process and whether it is distributed uniformly. Evaluate flow, moisture sensitivity, dispersion during use and washing performance. Avoid choosing a grade solely because it produces the highest laboratory solution viscosity.

Liquid or paste detergent

Evaluate hydration, viscosity development, compatibility with surfactants and salts, and stability during storage. Compare the addition sequence and mixing conditions with the intended production equipment. A grade that works in one liquid detergent may behave differently in another formula.

Which CMC properties should a buyer compare?

  • Viscosity: compare values measured at the same concentration, temperature and method.
  • Degree of substitution: discuss the required grade with the supplier and verify performance in the complete formula.
  • Particle size and physical form: consider powder, granular or instant options against the charging and mixing process.
  • Moisture and purity requirements: use agreed specification limits appropriate to the application.
  • Batch consistency: compare the COA and application results with the approved sample.

For preparation guidance, read how to dissolve sodium CMC in industry. For product form selection, use the powder versus granular CMC comparison.

How should a detergent trial be organised?

Keep the base formula and process conditions fixed when comparing grades. Record the CMC dosage on a defined weight basis, water quality, addition order, mixing time and temperature. Assess dispersion and viscosity first, then the agreed washing and storage checks. Include the existing approved grade or a control formulation for comparison.

There is no universal dosage or guaranteed cost advantage for every detergent. Select the grade and use level from trial results, the required performance and total formulation cost.

Request a detergent grade CMC sample

Share whether you make powder, liquid or paste detergent, the main formulation conditions, target viscosity and mixing equipment. Contact SINOCMC to discuss specification information and a suitable sample evaluation.

SINOCMC Team