N,N-Dimethyl-N-dodecylbenzenemethanaminium chloride
Synonyms
Benzenemethanaminium, N,N-dimethyl-N-dodecyl-, chloride;
Lauralkonium chloride;
Lauryl dimethyl benzyl ammonium chloride;
Ammonium, benzyldimethyldodecyl-, chloride;
Benzododecinium chloride;
n-Dodecyldimethylbenzylammonium chloride;
Benzyldodecyldimethylammonium chloride;
Benzenemethanaminium, N-dodecyl-N,N-dimethyl-, chloride;
N-Dodecyldimethylbenzylammonium chloride;
Dimethylbenzyldodecylammonium chloride;
Dimethyldodecylbenzylammonium chloride;
Benzalkonium chloride;
Category
Cationic surfactant
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Chemical Numbering System
CAS: 139-07-1
EINECS: 205-351-5
Molecular Formula & Molecular Weight
Molecular Formula: C21H38ClN; C21H38N.Cl
Molecular Weight: 339.99
Structure
Properties
Appearance (1), white to pale yellow solid or colloid; (2), colorless to pale yellow liquid.
Odor almond odor.
Solubility soluble in water. Soluble in ethanol.
Hygroscopicity hygroscopic.
Stability stable. Decomposition by high heat.
Risk Solid form: flammable material; irritation, strong irritation to skin, eye, respiratory system. Harmful products of combustion are CO, CO2, nitrogen oxides and so on. Contact with strong oxidants, can cause to burn.
GHS label: 
Animal Toxicity
Table 1 Animal toxicity values
|
rat oral LD50 |
400mg/kg[1] |
|
rat intraperitoneal LD50 |
100mg/kg[1] |
Ecology may be hazardous to environment. Water body should be given special attention.
Biodegradability biodegradable.
Characteristics excellent antistatic, antibacterial, antimicrobial, preservative, solubilizing, emulsifying, dispersing, anticorrosive, wetting abilities. Resistance to acid, light, hard water. No accumulation of toxicity.
Synthesis
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
GB/T 5174 Surface active agents -- Detergents -- Determination of cationic-active matter content
ISO 2871-1 Surface active agents -- Detergents -- Determination of cationic-active matter content -- Part 1: High-molecular-mass cationic-active matter
ISO 2871-2 Surface active agents -- Detergents -- Determination of cationic-active matter content -- Part 2: Cationic-active matter of low molecular mass (between 200 and 500)
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), HG/T 2230 Water treatment chemicals -- Dodecyl benzyl ammonium chloride
(1b), SH 2604.08 Water treatment chemicals Dodecyl (tetradecyl) dimethyl benzyl ammonium chloride
(1c), Chinese Pharmacopoeia (2015 Edition) Benzalkonium Chloride
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 disinfectant, antimicrobial agent, preservative.
Use as antistatic agent.
Use as emulsifying agent, dispersing agent.
Use as flocculant.
Use as deodorant.
2, Petroleum
Use as emulsifying agent, for example, used in emulsification of asphalt.
3, Textile, fiber, leather
Leveling agent in cationic dyes.
Antistatic agent, antimicrobial agent in textile, fiber, leather.
4, Organic synthesis
Use as phase transfer catalyst.
5, Polymer
Use as emulsifying agent, for example, used in emulsification of rubber.
6, Water treatment
Bactericide-algicide, slime stripping agent in water treatment.
7, Forestry
Antimicrobial agent, preservative in wood processing.
8, Agriculture
Emulsifying agent, dispersing agent, antimicrobial agent in pesticides.
9, Personal care products
Preservative, antistatic agent in personal care products.
Further information:
1, (1), In accordance with Safety and Technical Standards for Cosmetics (2015 Edition) of China, be included in the allowable preservatives.
As preservative, maximum concentration is 0.1% (as benzalkonium chloride).
(2), In accordance with Safety and Technical Standards for Cosmetics (2015 Edition) of China, be included in the restricted components.
Can be applied to rinse-off hair products and other products.
Maximum concentration is 0.5% (as benzalkonium chloride) in rinse-off hair products.
Maximum concentration is 0.1% (as benzalkonium chloride) in other products.
2, In accordance with EU regulations (EC) No 1223/2009, directive 98/62/EC, be included in Annex V/54.
Maximum concentration is 0.1% (as benzalkonium chloride).
10, Medicine
Use as pharmaceutical ingredient (disinfectant and antiseptic drug).
Pharmaceutical excipient, use as bacteriostat.
(This section is for reference only, should be implemented according to local Pharmacopoeia.)
Manufacturers
References
[1]: ChemIDplus. 139-07-1, Benzododecinium chloride
Update: 20140409(1); 20190512(2);