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Calcium dodecylbenzene sulfonate

Time:2012-09-28 16:25:43; Reading: 58

Calcium dodecylbenzene sulfonate

Synonyms

Benzenesulfonic acid, dodecyl-, calcium salt (2:1);

Dodecylbenzenesulfonic acid, calcium salt;

Calcium lauryl benzene sulfonate;

Category

Anionic Surfactant

> Sulfonate

>> Aryl Sulfonate

>>> Phenyl Sulfonate

>>>> Linear Alkylphenyl Sulfonate

Chemical Numbering System

CASRN:26264-06-2

EINECS:247-557-8

Molecular Formula & Molecular Weight

Molecular Formula: C36H58CaO6S2; C36H60O6S2.Ca

Molecular Weight: 691.05

Structure

Properties

Appearance    (1), transparent or slightly hazy amber liquid; (2), solid.

Solubility    slightly soluble in water; soluble in kerosene, xylene; dispersible or soluble in methanol.

Stability    stable.

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.10) label:  

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

GHS (Rev.10) label:  

Animal Toxicity

Table 1 Animal toxicity values

rat oral LD50

4000mg/kg[1]

mouse oral LD50

3680mg/kg[1]

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

Biodegradability    biodegradable.

Characteristics    excellent emulsifying, dispersing, lubricating, adsorbing abilities.

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

Synthesis

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

Generally, dodecylbenzene and sulfur trioxide react through reactor, then calcium oxide 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 alkyl benzenes 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, %, ≥

60.0 - 70.0

pH (25°C, 5%, 50% isopropanol solution)

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

Liquid

Solid

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.

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

Major Uses

1, Typical applications

Use as emulsifying agent, dispersing agent.

2, Pesticide

Use as emulsifying agent.

3, Personal care products

Use as cleansing agent, emulsifying agent.

Manufacturers

 

References

[1]: ChemIDplus. 26264-06-2, Calcium dodecylbenzenesulfonate

Update: 20131025(1); 20170310(2);

Document

[Terminology] Dispersion system

[Terminology] Vesicle

Pandect of Ester surfactants (1): Definition

[Terminology] Van Der Waals force

[Terminology] Micellar aggregation number

Standard

Test methods of surfactants, catalog, Chinese national standards

Surfactants, catalog, Chinese national standards

Test methods of materials, catalog, Chinese national standards

Basic standards of materials, catalog, Chinese national standards

Test methods of textile auxiliaries, catalog, Chinese national standards