Potassium decyl sulfate
Time: 2013-10-20 11:46:24

Potassium decyl sulfate

Synonyms

Sulfuric acid, monodecyl ester, potassium salt (1:1);

Category

Anionic Surfactant

> Sulfate

>> Chain Alcohol Sulfate

>>> Alkanol Sulfate

>>>> Linear Alkanol Sulfate

Chemical Numbering System

CASRN7739-63-1

EINECS231-803-6

Molecular Formula & Molecular Weight

Molecular Formula: C10H21KO4S; C10H22O4S.K

Molecular Weight: 276.45

Structure

Properties

Appearance    (1), solid; (2), liquid.

Odor    faint characteristic odor.

Solubility    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:  

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

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

Synthesis

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

Generally, decyl alcohol and sulfur trioxide react through reactor, then potassium 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

Item

Physical and chemical indexes

Solid

Liquid

Actives, %, ≥

90.0

30.0

pH (25°C, 1% solution)

7.0 - 10.5

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

Solid

Liquid

Heavy metals (as Pb), mg/Kg, ≤

20

20

As, mg/Kg, ≤

3

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 wetting agent, permeating agent.

Use as cleansing agent.

2, Household detergents

Main ingredient or auxiliary ingredient for cleansing agent in laundry detergent and other household products.

3, Industrial cleaning agents

Main ingredient or auxiliary ingredient for cleansing agent in car cleaning products, metal cleaning products and other industrial cleaning products.

4, Emulsion polymerization

Emulsifier, particle size controlling agent in emulsion polymerization.

5, Textile

Use as wetting agent, cleansing agent.

6, Pets

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

Manufacturers

 

Update: 20161106(1);