Phosphoric Acid, Monododecyl Ester
Synonyms
Dihydrogen monolauryl phosphate;
Lauryl dihydrogen phosphate;
Monododecyl phosphate;
Monolauryl phosphate;
Dodecyl dihydrogen phosphate;
Category
Anionic Surfactant
> Phosphate
>> Chain Phosphate
>>> Alkyl Phosphate
>>>> Linear Alkyl Phosphate
Chemical Numbering System
CASRN：2627-35-2
EINECS：220-095-4
Molecular Formula & Molecular Weight
Molecular Formula: C12H27O4P
Molecular Weight: 266.31
Structure
Properties
Appearance (1), white to slightly yellow solid.
Solubility slightly soluble in water; soluble in ethanol.
Stability stable. Under strong acid condition, easily hydrolyzed.
Risk Solid form: irritation, irritation to skin, eye, respiratory system.
GHS (Rev.10) label: 
Ecology may be hazardous to environment. Water body should be given special attention.
Biodegradability biodegradable.
Characteristics excellent emulsifying, dispersing, anticorrosive, antirust, lubricating, cleansing, solubilizing, antistatic, wetting abilities. Low to moderate foaming. Resistance to high concentration of alkali. Intolerance to hard water. Can be used as soap substitute.
Note (1), Can be used in children cleaning products.
Synthesis
Obtained that lauryl alcohol reacts with polyphosphoric acid (or phosphorus pentoxide).
Quality Standards & Test Methods
1, Physical and chemical indexes
|
Item |
Physical and chemical indexes |
|
Solid |
|
|
Actives, %, ≥ |
90.0 |
Test Methods
(1), Actives
GB/T 13173 Surface active agents - Detergents - Testing methods
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, Product standards
(1), Chinese standards
(1a), QB/T 4948 Cosmetic ingredients -- Lauryl phosphate
(1b), QB/T 2949 Phosphoric acid ester
4, 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, according to local regulations and standards.
Major Uses
1, Typical applications
Use as emulsifying agent, dispersing agent.
Use as anticorrosive agent.
Use as cleansing agent.
2, Machinery
Lubricant, corrosion inhibitor, antirust agent in metalworking fluids.
3, Personal care products
Cleansing agent, emulsifying agent in personal care products. Similar with natural phospholipids, good compatibility with skin.
4, Household detergents
Cleansing agent in household cleaning products.
5, Industrial cleaning agents
Cleansing agent, dispersing agent, antirust agent in industrial cleaning.
6, Textile
Antistatic agent, cleansing agent in textile.
Manufacturers
Update: 20140330(1); 20190303(2);