Zinc coceth sulfate
Time: 2013-06-02 05:17:44

Zinc coceth sulfate

Synonyms

Fatty alcohols, coco-, ethoxylated, sulfates, zinc salts;

Zinc di(coco-alkylpoly(oxyethylene)sulfate);

Category

Anionic Surfactant

> Sulfate

>> Alcohol Polyether Sulfate

>>> Alcohol Polyoxyethylene Ether Sulfate

>>>> Natural Substance Derivatives Polyoxyethylene Ether Sulfate

Chemical Numbering System

CASRNN/A

EINECSN/A

Molecular Formula & Molecular Weight

Molecular Formula: N/A

Molecular Weight: N/A

Structure

R: coco-.

Properties

Appearance    (1), paste; (2), liquid; (3), solid..

Odor    faint characteristic odor.

Solubility    soluble in water. The solubility increases with the increase of EO number.

Stability    stable in alkali, weak acid and hard water; unstable in strong acid, easily hydrolyzes.

Risk    Liquid (or paste) form: irritation, irritation to skin, eye. Under the same hydrophobic base, with the increase of EO number, toxicity and irritation decrease, in general, the EO number is greater than 5, the decline is significantly smaller, tends to flat.

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, dispersing, solubilizing, foam stabilizing abilities. Resistant to hard water. Performance is affected by EO number, such as: with the increase of EO number, cleansing capability decreases, solubilization capacity increases. Easily thicken, can provides good viscosity.

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

(2), 1,4-dioxane generated during preparation: probable carcinogen. However, can be acceptable when concentration of 1,4-dioxane is less than 30ppm or less.

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

Synthesis

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

1, Synthesis of polyether

Obtain by polymerization reaction of coconut alcohol and ethylene oxide.

For further information, see:

US patent 4,223,163 Process for making ethoxylated fatty alcohols with narrow polyethoxy chain distribution; US patent 4,967,017 Alcohol ethoxylates of reduced EO content or residual PO content; US patent 5,069,817 Process for making polyoxyethylene surfactants with desirable low temperature behavior, etc.

2, Synthesis of sulfate

Coconut alcohol polyoxyethylene ether and sulfur trioxide react through reactor, then zinc carbonate 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 polyethers 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

High-enriched type

Low-enriched type

Actives, %, ≥

55.0 - 72.0

25.0 - 30.0

pH (25°C, 10% solution)

6.5 - 9.5

6.5 - 9.5

1,4-Dioxane, ppm, ≤

30

30

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

(3), 1,4-Dioxane

GB/T 26388 Determination of dioxane residues in surfactants - Gas chromatographic method

ISO 17280 Surface active agents -- Determination of 1,4-dioxan residues in surfactants obtained from epoxyethane by gas chromatography

2, Hazardous substances indexes

Item

Hazardous substances indexes

High-enriched type

Low-enriched type

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 cleansing agent.

Use as emulsifying agent, dispersing agent.

Use as foam stabilizing agent, foaming agent.

Use as solubilizing agent.

2, Personal care products

Cleansing agent, emulsifying agent in personal care products.

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

Can provides good viscosity, foam and skin compatibility.

The products that contact with the skin for a long time, not recommended to use.

*  *  *  *  *  *

Further information:

(1), In accordance with EU regulations (EC) No 1223/2009, directive 82/368/EEC, water-soluble zinc salt is included in Annex III/24.

Maximum concentration is 1% (as zinc).

3, Household detergents

Main ingredient or auxiliary ingredient for cleansing agent, foaming agent in laundry detergent, hard surface detergent (for example: glass detergent) and other household products.

Particularly, suitable for the preparation of high bubble and light-duty detergents.

4, Industrial cleaning agents

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

Particularly, suitable for the preparation of high bubble detergents, for example: car cleaning agents.

5, Emulsion polymerization

Emulsifier, particle size controlling agent in emulsion polymerization.

6, Textile, leather

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

7, Pets

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

Product members

 

Manufacturers

 

Update: 20131018(1); 20171005(2);