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Hexadecanoic Acid Sodium Salt

Time:2012-10-02 16:34:45; Reading: 20

Hexadecanoic Acid Sodium Salt

Synonyms

Palmitic acid, sodium salt;

Sodium hexadecanoate;

Sodium palmitate;

Category

Anionic Surfactant

> Carboxylate

>> Chain Carboxylate

>>> Alkyl Carboxylate

>>>> Linear Alkyl Carboxylate

Chemical Numbering System

CASRN:408-35-5

EINECS:206-988-1

Molecular Formula & Molecular Weight

Molecular Formula: C16H31NaO2; C16H32O2.Na

Molecular Weight: 278.41

Structure

Properties

Appearance    (1), white solid.

Solubility    slightly soluble in water. soluble in hot ethanol.

Stability    stable.

Risk    Solid form: flammable material; irritation, irritation to skin, eye, respiratory system. 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

dog intravenous LDLo

10mg/kg[1]

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

Biodegradability    biodegradable.

Characteristics    excellent lubricating, cleansing, emulsifying, dispersing, foaming, solubilizing abilities. Nonresistant to hard water. Typical ingredient in soap(sodium soap).

Synthesis

Heat palmitic acid to melt, add sodium hydroxide solution, and neutralize, obtain.

Quality Standards & Test Methods

1, Physical and chemical indexes

Item

Physical and chemical indexes

Solid

Actives, %, ≥

95.0

Test Methods

(1), Actives

GB/T 13173 Surface active agents - Detergents - Testing methods

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, Hazardous substances indexes

Item

Hazardous substances indexes

Solid

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

Major Uses

1, Typical applications

Use as lubricant.

Use as cleansing agent.

Use as emulsifying agent, dispersing agent.

2, Household detergents

Use as cleansing agent.

3, Personal care products

Cleansing agent, emulsifying agent, viscosity controlling agent in personal care products.

4, Machinery industry

Lubricant in metal processing, machinery.

5, Powder forming

Lubricant, release agent in powder forming.

6, Textile

Waterproofing agent in textile.

7, Pets

Use as cleansing agent, emulsifying agent.

Manufacturers

 

References

[1]: ChemIDplus. 408-35-5, Sodium palmitate

Update: 20131102(1); 20171225(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