Sodium Lauroyl Methyl Isethionate

Synonyms

Dodecanoic acid, methyl-2-sulfoethyl ester, sodium salt;

SLMI;

Category

Anionic Surfactant

> Sulfonate

>> Ester Sulfonate

>>> Fatty Acyl Hydroxyalkyl Sulfonate

>>>> Linear Alkyl Fatty Acyl Hydroxyalkyl Sulfonate

Chemical Numbering System

CASRN：928663-45-0

EINECS：N/A

Molecular Formula & Molecular Weight

Molecular Formula: C15H29NaO5S; C15H30O5S.Na

Molecular Weight: 344.44

Structure

Properties

Appearance    (1), white flake solid.

Odor    faint grease odor.

Solubility    soluble in water.

Stability    stable in weak acid, weak alkali, hard water. Under strong acid or strong alkali, easily hydrolyze.

Risk    Solid form: flammable material; irritation, low irritation to skin, eye. Harmful products of combustion are CO, CO2 and so on. Contact with strong oxidants, can cause to burn.

GHS (Rev.9) label:  

Ecology    may be hazardous to environment. Water body should be given special attention.

Biodegradability    biodegradable.

Characteristics    excellent cleansing, foaming, emulsifying, dispersing, wetting, solubilizing abilities. Mild. Easily thickening. Can be used in sulfate-free formula.

Note    (1), Can use in children products, such as shampoo, bath liquid and so on.

Synthesis

Hydroxy-methyl ethanesulfonic acid sodium salt reacts with lauric acid, then obtain.

For further information, see:

United States Patent 8,008,239 Acylalkylisethionate esters and applications in consumer products,

United States Patent 8,105,993 Process compositions and production of acyl alkylisethionate compositions,

United States Patent 8,580,723 Process compositions and production of acyl alkylisethionate compositions,

United States Patent 9,598,358 Acylalkylisethionate esters and applications in consumer products, and so on.

Quality Standards & Test Methods

1, Physical and chemical indexes

Item	Physical and chemical indexes
	Solid
Actives, %, ≥	80.0 - 85.0
pH (25°C, 10%)	5.0 - 7.5

Test Methods

(1), Actives

GB/T 5173 Surface active agents and detergents－Determination of anionic-active matter by direct two-phase titration procedure

ISO 2271 Surface active agents -- Detergents -- Determination of anionic-active matter by manual or mechanical direct two-phase titration procedure

(2), pH

GB/T 6368 Surface active agents - Determination of pH of aqueous solution - Potentiometric method

ISO 4316 Surface active agents -- Determination of pH of aqueous solutions -- Potentiometric method

2, Hazardous substances indexes

Item	Hazardous substances indexes
	Solid
Heavy metals (as Pb), mg/Kg, ≤	20
As, mg/Kg, ≤	3

Test Methods

(1), Heavy metals (as Pb)

Safety and Technical Standards for Cosmetics (2015 Edition)

GB/T 30799 The test method of food detergents - Determination of heavy metals

(2), As

Safety and Technical Standards for Cosmetics (2015 Edition)

GB/T 30797 The test method of food detergents - Determination of total arsenic

3, Further explanation

(a), On physical and chemical indexes: firstly, shall be indicated carbon atom distribution; secondly, shall be indicated average molecular weight.

(b), Used in cosmetics, should be test for harmful substances; or furtherly test for microorganisms.

Major Uses

1, Typical Applications

Use as cleansing agent.

Use as foaming agent.

Use as emulsifying agent, dispersing agent.

2, Personal care products

Use as cleansing agent, foaming agent.

Characteristics: mild, rich foam, smooth skin feeling after washing.

Manufacturers

 

Update: 20131028(1); 20170814(2);