Sodium cetearyl sulfate
Time: 2013-06-02 05:06:07

Sodium cetearyl sulfate


Sodium cetostearyl sulfate;

Sodium cetyl/stearyl sulfate;

Sulfuric acid, monooctadecyl ester, sodium salt, mixt. with sodium hexadecyl sulfate;


Anionic Surfactant

> Sulfate

>> Chain Alcohol Sulfate

>>> Alkanol Sulfate

>>>> Linear Alkanol Sulfate

Chemical Numbering System

CASRN: 59186-41-3


Molecular Formula & Molecular Weight

Molecular Formula: C16H33NaO4S - C18H37NaO4S; C16H34O4S.Na - C18H38O4S.Na

Molecular Weight: 344.49 - 372.54


R: C16/C18.


Appearance    (1), solid.

Solubility    slightly soluble in water.

Stability    stable in alkali, weak acid and hard water; unstable in strong acid, hydrolyzed, reduced to alcohol.

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

GHS (Rev.7) label:  

Animal Toxicity

Table 1 Animal toxicity values[1]

rat oral LD

> 10000mg/kg

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

Biodegradability    biodegradable.

Characteristics    excellent cleansing, emulsifying, dispersing, solubilizing, wetting, foaming abilities. Resistant to hard water.

Note    (1), Avoid using in children cleaning products, such as: shower gels, shampoo, skin care products.


Currently, sulfated reaction through continuous reactor (such as: falling film reactor) is the most widely used method for preparing sulfates.

Generally, cetyl/stearyl alcohol and sulfur trioxide react through reactor, then sodium hydroxide neutralizes, finally obtain product.

US patent 8,921,588 (Process for preparing sulfates and/or sulfonates in a micro-reaction system) presents a synthetic process. Conditions: mole ratio of sulfur trioxide and alcohols or other raw materials: 1:1; temperature: 30-60°C; reactor: falling film reactor.

US patent 6,455,488 (Process of making alkyl sulfate granulates) describes the preparation of a particulate alkyl sulfate, but does not involve the synthesis process.

US patent US 6,331,645 (Process for preparing powdery alkyl sulfates) describes the preparation of a powdery alkyl sulfate, but does not involve the synthesis process.

Quality Standards & Test Methods

1, Physical and chemical indexes


Physical and chemical indexes


Actives, %, ≥


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, Hazardous substances indexes


Hazardous substances indexes


Heavy metals (as Pb), mg/Kg, ≤


As, mg/Kg, ≤


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.

Major Uses

1, Typical applications

Use as cleansing agent.

Use as emulsifying agent, dispersing agent.

2, Household detergents

Use as cleansing agent.

3, Industrial cleaning agents

Use as cleansing agent.

4, Personal care products

Use as cleansing agent, foaming agent.

5, Pets

Main ingredient or auxiliary ingredient for cleansing agent in shampoos and other pet products.




[1]: ChemIDplus. Sodium cetearyl sulfate, 59186-41-3

Update: 20131018(1); 20161021(2);