Tetramethylammonium hydroxide
Synonyms
Methanaminium, N,N,N-trimethyl-, hydroxide (1:1);
TMAH;
Category
Cationic surfactant
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Chemical Numbering System
CAS: 75-59-2
EINECS: 200-882-9
Molecular Formula & Molecular Weight
Molecular Formula: C4H13NO; C4H12N.HO
Molecular Weight: 91.15
Structure
Properties
Appearance (1), solid.
Solubility soluble in water.
Hygroscopicity hygroscopic.
Stability stable.
Risk Solid form: corrosion; flammable material; irritation, strong 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 label: 
Animal Toxicity
Table 1 Animal toxicity values
|
frog parenteral LDLo |
5mg/kg[1] |
|
guinea pig skin LD50 |
25mg/kg[1] |
|
mouse subcutaneous LDLo |
19mg/kg[1] |
|
rat intravenous LDLo |
1mg/kg[1] |
Ecology may be hazardous to environment. Water body should be given special attention.
Biodegradability biodegradable.
Characteristics excellent antistatic, dispersing abilities.
Synthesis
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
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.
Major Uses
1, Typical applications
Use as antistatic agent.
Use as phase transfer catalyst.
Use as buffer.
Manufacturers
References
[1]: ChemIDplus. 75-59-2, Tetramethylammonium hydroxide
Update: 20190421(1);