DEA-C12-13 alkyl sulfate
Time: 2013-06-02 05:01:53

DEA-C12-13 alkyl sulfate

Synonyms

C12-C13 Alkyl alcohol sulfuric acid, diethanolamine salt;

Category

Anionic Surfactant

> Sulfate

>> Chain Alcohol Sulfate

>>> Alkanol Sulfate

>>>> Linear Alkanol Sulfate

Chemical Numbering System

CASRN: N/A

EINECS: N/A

Molecular Formula & Molecular Weight

Molecular Formula: C16H37NO6S - C17H39NO6S; C12H26O4S.C4H11N1O2 - C13H28O4S. C4H11N1O2

Molecular Weight: 371.53 - 385.56

Structure

R: C12-13.

Properties

Appearance    (1), liquid.

Solubility    soluble in water.

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

Risk    Liquid form: irritation, moderate irritation to skin, eye.

GHS (Rev.7) label: 

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

Biodegradability    biodegradable.

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

Note    (1), Do not use in personal care products.

(2), Do not use in nitrosating environment. Reaction of diethanolamine and nitrous acid can produce nitrosamines. Nitrosamine is a carcinogen.

Synthesis

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

Generally, C12-13 alkyl alcohol and sulfur trioxide react through reactor, then diethanolamine 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.

Quality Standards & Test Methods

1, Physical and chemical indexes

Item

Physical and chemical indexes

Liquid

Actives, %, ≥

30.0

pH (25°C, 1% solution)

7.0 - 10.5

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

Liquid

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.

Major Uses

1, Typical applications

Use as cleansing agent.

Use as emulsifying agent, dispersing agent.

Use as foaming agent.

2, Industrial cleaning agents

Use as cleansing agent.

Manufacturers

 

Update: 20131018(1); 20161020(2);