Tetramethylammonium hydroxide (TMAH or TMAOH) is a quaternary ammonium salt with the molecular formula [(CH
3)
4N]
+[OH]
-, and is the simplest member of the class of organic quaternary ammonium compounds. One of its industrial uses is for the anisotropic etching of silicon. It is also used as a basic solvent in the development of acidic photoresist in the photolithography process. Since it is a phase transfer catalyst, it is highly effective in stripping photoresist. It is also used as a surfactant in the synthesis of ferrofluid, to prevent agglomeration.
| Chemical name |
Tetramethylammonium hydroxide Solution |
| Other name |
TMAH |
| CAS # |
75-59-2 |
| Purity |
25% min |
| Molecular formula |
(CH3)4NOH |
| Molecular weight |
91.15 |
| Chemical Properties |
Colorless to light yellow liquid.Easy to absorb carbon dioxide, strong alkaline, strong corrosive. |
| Application |
1. Phase transfer catalysts in organic synthetic chemistry.
2. Anisotropic corrosion solution for electronic industry, catalyst for polymerization of silicone rubber and other silicone products |
| Packing |
1KG, 25KG, 200kg, 1000KG IBC, ISO TANK |
| Specifications |
Item |
Unit |
MIN |
MAX |
|
Assay |
% |
24.90 |
25.10 |
|
Color |
Hazen |
|
5 |
|
CO32- (Carbonate) |
ppm |
|
100 |
|
Cl- ( Chloride ) |
ppm |
|
0.1 |
|
CH3OH (Methanol) |
ppm |
|
40 |
|
Li (Lithium) |
ppb |
|
5 |
|
Na (Sodium) |
ppb |
|
10 |
|
Mg (Magnesium) |
ppb |
|
5 |
|
Al (Aluminium) |
ppb |
|
10 |
|
K (Potassium) |
ppb |
|
10 |
|
Ca (Calcium) |
ppb |
|
10 |
|
Cr (Chromium) |
ppb |
|
5 |
|
Mn (Manganese) |
ppb |
|
5 |
|
Fe (Iron) |
ppb |
|
5 |
|
Ni (Nickel) |
ppb |
|
5 |
|
Co (Cobalt) |
ppb |
|
5 |
|
Cu (Copper) |
ppb |
|
5 |
|
Zn (Zinc) |
ppb |
|
5 |
|
Mo (Molybdenum) |
ppb |
|
5 |
|
Cd (Cadmium) |
ppb |
|
5 |
|
Pb (Lead) |
ppb |
|
5 |
|
Ag (Silver) |
ppb |
|
5 |
|
Particle >=0.5um |
Ea/ml |
|
100 |
| Physical Properties* |
Form |
Liquid |
|
Boiling Point,°C |
100.0 |
|
Freezing point, °C |
<-25.0 |
|
Viscosity@ 25 °C,cst |
2.8 |
|
Specific Gravity @ 60 °F |
1.022 |
|
Flashpoint (Pensky Martens), °F |
>200 |
|
pH |
>13 |
| Shipping Information |
Containers |
|
200L clean drum |
|
Other containers available upon request. |
|
Shipping Classification |
|
Proper shipping name: tetramethylammonium hydroxide |
|
Hazard classification: 8 |
|
Identification number: UN1835, PGII |
| Safety and Handling |
For specific safety and handling information please refer to the |
|
Material Safety Data Sheet which is available upon request. |
| Remarks* |
Tetramethylammonium Hydroxide(2.380%,20.0%,electronic grade), TMAH (25%, 98%,industrial grade) are also available, please contact us for details. |
1) In the aspect of analysis, tetramethylammonium Hydroxide can be used as polarographic reagent.
2) In terms of product purification, it was used as ash free alkali to sediment some metallic element.
3) in electronic industry , especially as positive resister developer , silicon wafer wet etchant and super clean solution for CMP process.
4) in the manufacture of integrated circuits, liquid crystal displays, printed circuit boards, capacitors, sensors, and many other electronic components.
How should I take Tetramethylammonium Hydroxide?
Contact: daisy@shxlchem.com
Payment terms
T/T(telex transfer), Western Union, MoneyGram, BTC(bitcoin), etc.
Lead time
≤25kg: within three working days after payment received.
＞25kg: one week
Sample
Available
Package
200kg per drum, 25kg per drum, or as you required.
Storage
Store the container tightly closed in a dry, cool and well-ventilated place. Store apart from foodstuff containers or incompatible materials.