Home Categories Organic Chemistry Tetramethylammonium hydroxide solution
A7636412

Tetramethylammonium hydroxide solution , 10wt.%inmethanol , 75-59-2

Synonym(s):
TMAH solution

CAS NO.:75-59-2

Empirical Formula: C4H13NO

Molecular Weight: 91.15

MDL number: MFCD00008280

EINECS: 200-882-9

Update time: 2022-07-08

PRODUCT Properties

Melting point: °C
Boiling point: 110 °C
Density  0.866 g/mL at 25 °C
vapor pressure  17.5 mm Hg ( 20 °C)
refractive index  n20/D 1.384
Flash point: 80 °F
storage temp.  Store below +30°C.
solubility  Methanol (Sparingly), Water (Slightly)
form  Solution
color  APHA: ≤10
Odor strong ammonia-like odor
PH >13 (H2O, 20°C)
Water Solubility  Soluble in water.
Sensitive  Air Sensitive
Merck  14,9224
BRN  3558708
Stability: Stable. Flammable. Incompatible with strong oxidizing agents, strong acids.
InChIKey WGTYBPLFGIVFAS-UHFFFAOYSA-M
CAS DataBase Reference 75-59-2(CAS DataBase Reference)
EPA Substance Registry System Tetramethylammonium hydroxide (75-59-2)

Description and Uses

Tetramethylammonium hydroxide is a solid in the hydrated form or a colorless liquid with a strong ammonia-like odor. It is soluble in water, and corrosive to metals and tissue.

Tetramethylammonium hydroxide is used to produce tetramethyl-ammonium azide. It is used as an anisotropic etchant of silicon, basic solvent in the development of acidic photoresist in photolithography process, as surfactant in the synthesis of ferrofluid and as a polarographic reagent. It finds application in the production of organic silicon, where it is used for computer silicon wafer surface brightener and cleaning agent. It is also involved in the purification of some metallic elements.
Tetramethylammonium hydroxide solution (25 wt.% solution in water) may be used as a base for pH adjustment to obtain hexagonal mesoporous aluminophosphate (TAP).

Safety

Symbol(GHS) 
GHS02,GHS05,GHS06,GHS08
Signal word  Danger
Hazard statements  H226-H300+H310-H314-H331-H370-H372-H412
Precautionary statements  P210-P273-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338
Hazard Codes  C,T,F,T+,Xn
Risk Statements  24/25-34-20/21/22-39/23/24/25-23/24/25-10-21/22-25-21-11-67-36-52-48/24-27/28-23-35-36/38
Safety Statements  45-36/37/39-26-16-36/37-28
RIDADR  UN 3286 3/PG 2
WGK Germany  1
RTECS  PA0875000
4.4-10-34
TSCA  Yes
HazardClass  3
PackingGroup  II
HS Code  29239000
Hazardous Substances Data 75-59-2(Hazardous Substances Data)

RELATED PRODUCTS