Biodegradable Ether Carboxylic Acid-based Hypoallergenic Detergent Base"BEAULIGHT® LCA-25N"

What's great about ether carboxylic acid type detergent base



-As a hypoallergenic detergent, "BEAULIGHT® LCA-25N" is suitable for sulfate-free shampoos, body soaps, etc.

-"BEAULIGHT® LCA-25N" is an ether carboxylic acid that uses a unique narrow ethoxylation technology (*) and has low skin and eye irritation.

*This technology produces ether carboxylic acids with a narrow distribution of ethylene oxide added and low unreacted higher alcohol content.



"BEAULIGHT® LCA-25N" is an ether carboxylic acid surfactant made from naturally occurring alcohols. It is highly biodegradable.



Even with its weak acidity, "BEAULIGHT® LCA-25N" exhibits good foaming properties and is characterized by a refreshing wash.


Hard water resistance

Good hard water resistance.

Ingredient Information
Cosmetics labeling name Sodium laureth-4-carboxylate
Evaporation Residue Approx. 28wt%
Appearance Colorless to pale yellow liquid
Molecular structure

Performance of "BEAULIGHT® LCA-25N"

Performance comparison chart with CGT (TEA cocoyl glutamate) and SLES (sodium laureth sulfate)

Fig. Performance Comparison Chart

*1  CGT: Cocoyl glutamate TEA
*2  SLES: Sodium laureth sulfate

 Compared to CGT and SLES, it is hypoallergenic and gentler on the skin.

Foam height and size
 Forms bubbles comparable to those of general anionic surfactants.

Foam viscosity
 It shows the same foam viscosity as SLES, and forms moist and glossy foam.

Protein denaturation rate (irritation)

Fig. Protein denaturation rate in each detergent base

 *1 CGT: TEA cocoyl glutamate
 *2 SLES: Sodium laureth sulfate

Sanyo Chemical's proprietary "narrow ethoxylation technology" allows for use as a cleaning base for shampoos and body soaps with minimal irritation.

Test Method
 Protein: 0.05% albumin solution
 Active agent concentration: 1.0% aqueous solution of active ingredient
 (SLES (sodium laureth sulfate) is measured as a standard)
Bath ratio: albumin aqueous solution/activator aqueous solution = 9/1 
Denaturation temperature: 20-25°C x 24 hours
Quantitative method: High performance liquid chromatography (HPLC)

 Protein denaturation rate (%)= {(peak height of blank after 24 hours)-(peak height of sample solution after 24 hours)} / (peak height of blank after 24 hours) × 100

Hard water resistance

"BEAULIGHT® LCA-25N" has good hard water resistance equivalent to SLES (sodium laureth sulfate).

Surfactant Hard water resistance (mL)
SLES (Sodium laureth sulfate) ≧ 200
CGT (TEA cocoyl glutamate) 1

Application data

Example formulation: Sulfate-free high foaming shampoo

INCI name Product name Formulation
A water 18.45
sodium benzoate 0.3
B Polyquaternium-10 0.5
water 25
C Cocamidopropyl betaine


Sodium laureth 4-carboxylate BEAULIGHT® LCA-25N 35
Sodium lauryl carboxylate BEAULIGHT® SHAA 5
D Polyquaternium-47 0.7
water 1.4


F citric acid 0.15


High-foaming shampoo formulation method

  1. A: Dissolve uniformly at room temperature.​
  2. B: After stirring and dispersing at room temperature, heat to 70-75°C to dissolve uniformly, and then feed into A at room temperature to mix uniformly.
  3. Dissolve C uniformly in the A+B mixture at room temperature.
  4. While stirring the mixture of A+B+C at room temperature, add D and dissolve uniformly.
  5. Put E into the mixture of A+B+C+D and stir uniformly.
  6. F is added to the mixture of A+B+C+D+E and the pH is adjusted to 5.5-6.0.
  7. After uniformly stirring, cool and defoam.

Related Infomation

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Cosmetic raw materials
Links to Sanyo Chemical's corporate site

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