Sulfuric Acid, Mono-C12-14-alkyl Esters, Triethanolamine Salts
Time: 2012-09-07 15:54:25

Sulfuric Acid, Mono-C12-14-alkyl Esters, Triethanolamine Salts

Synonyms

TEA-C12-14 alkyl sulfate;

C12-14-alkyl alcohol sulfuric acid, triethanolamine salt;

Category

Anionic Surfactant

> Sulfate

>> Chain Alcohol Sulfate

>>> Alkanol Sulfate

>>>> Linear Alkanol Sulfate

Chemical Numbering System

CASRN: 90583-18-9

EINECS: 292-216-9

Molecular Formula & Molecular Weight

Molecular Formula: C18H41NO7S – C20H45NO7S; C12H26O4S.C6H15N1O3 - C14H30O4S.C6H15N1O3

Molecular Weight: 415.59 – 443.64

Structure

R: C12-14.

Properties

Appearance    (1), colorless to slightly yellow liquid; (2), paste.

Odor    faint characteristic odor.

Solubility    soluble in water.

Physical - chemical properties

Flash point, °C

> 93

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

Risk    Liquid form: irritation, 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. Mild. Resistant to hard water. Transparent at low temperature. Foam is rich and exquisite. Good compatibility.

Note    (1), Do not use in children products that can be direct prolonged contact with the skin, such as: skin care products.

(2), Avoid using in children cleaning products, such as: shampoos.

(3), Compare with triethanolamine, diethanolamine and monoethanolamine have higher toxicity, and therefore diethanolamine C12-14 alkyl sulfate and monoethanolamine C12-14 alkyl sulfate are not suitable for personal care products, also run low in other applications.

(4), Do not use in nitrosating environment. Reaction of triethanolamine and nitrous acid can not produce nitrosamines, however, reaction of contained secondary amine of triethanolamine 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, C12-14 alkyl alcohol and sulfur trioxide react through reactor, then triethanolamine 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, %, ≥

38-42

Unsulfated materials, %, ≤

1.0

Triethanolamine hydrochloride, %, ≤

0.5

Triethanolamine sulfate, %, ≤

0.5

pH (25°C, 10% solution)

6.5-7.5

Color*, Gardner, ≤

2

Color*, %T at 410 nm, ≥

92

Density, g/mL, approx.

1.04

*: Choose one of two.

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), Unsulfated materials

GB/T 11989 Anionic surface active agents - Determination of soluble matter content in light petroleum

ISO 894 Surface active agents -- Technical sodium primary alkylsulphates -- Methods of analysis

(3), Triethanolamine hydrochloride

GB/T 15963 Sodium lauryl sulfate, triethanolamine hydrochloride calculated.

ISO 894 Surface active agents -- Technical sodium primary alkylsulphates -- Methods of analysis

(4), Triethanolamine sulfate

GB/T 15963 Sodium lauryl sulfate, triethanolamine sulfate calculated.

ISO 894 Surface active agents -- Technical sodium primary alkylsulphates -- Methods of analysis

(5), 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

(6), Color (Gardner)

GB/T 22295 Standard test method for color of transparent liquids (Gardner Color Scale)

ISO 4630 Clear liquids -- Estimation of colour by the Gardner colour scale

(7), Density

GB/T 4472 Determination of density and relative density for chemical products

ISO 758 Liquid chemical products for industrial use -- Determination of density at 20 degrees C

(8), Color (%T at 410 nm)

Measure by spectrophotometer.

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.

(b), Generally, TEA-C12-14 alkyl sulfate and triethanolamine lauryl sulfate replace to use each other.

Major Uses

1, Typical applications

Use as foaming agent.

Use as cleansing agent.

Use as emulsifying agent, dispersing agent.

Use as wetting agent.

2, Personal care products

Cleansing agent, foaming agent, emulsifying agent in personal care products.

For example, main ingredient or auxiliary ingredient for cleansing agent, foaming agent in shampoo, hand sanitizer, bubble bath, shaving foam and other products.

Particularly suitable for washing dry hair.

*  *  *  *  *  *

Further information:

(1), In accordance with EU regulations (EC) No 1223/2009, directive 2003/83/EC, TEA-C12-14 alkyl sulfate is included in Annex III/62.

TEA-C12-14 alkyl sulfate can be applied to leave-on products and rinse-off products.

Maximum concentration of TEA-C12-14 alkyl sulfate is 2.5% in leave-on products (triethanolamine calculated).

In raw materials, maximum secondary amine content is 0.5%.

Maximum nitrosamine content is 50μg/kg.

The container is nitrite-free.

3, Household detergents

Main ingredient or auxiliary ingredient for cleansing agent, foaming agent in laundry detergent, carpet cleaning agent, kitchen cleaning agent and other household products.

4, Industrial cleaning agents

Main ingredient or auxiliary ingredient for cleansing agent, foaming agent.

5, Pets

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

6, Emulsion polymerization

Emulsifier, particle size controlling agent in emulsion polymerization. For example, polyvinyl chloride emulsion polymerization.

7, Textile, leather

Use as emulsifier, foaming agent, cleansing agent, wetting agent, antistatic agent, solubilizing agent.

Manufacturers

 

Update: 20131018(1); 20160728(2);