75-59-2

Product Name: Tetramethylammonium hydroxide

Formula: C4H13NO

Synonyms: TMAH solution

Inquiry

CHEMICAL AND PHYSICAL PROPERTIES SAFETY INFORMATION COMPUTED DESCRIPTORS PRODUCT INTRODUCTION RELATED SUPPLIERS

CHEMICAL AND PHYSICAL PROPERTIES

Physical Description	Tetramethylammonium hydroxide is a solid in the hydrated form or a colorless liquid with a strong ammonia-like odor. It is soluble in water. It is corrosive to metals and tissue.
Color/Form	The free base is known only in solution or as a solid pentahydrate, forming colorless, deliquescent needles
Odor	Strong ammonia-like
Melting Point	63 °C
Density	Specific gravity of solution approximately 1.00 at 24 °C/4 °C
Stability/Shelf Life	Stable under recommended storage conditions. /Tetramethylammonium hydroxide pentahydrate/
Decomposition	When heated to decomposition it emits toxic fumes of /nitrogen oxides and ammonia/.
Corrosivity	Corrosive
Other Experimental Properties	Decomposes to trimethylamine and methanol upon distillation
Chemical Classes	Other Classes -> Bases

SAFETY INFORMATION

Signal word	Danger
Pictogram(s)	Flame Flammables GHS02 Corrosion Corrosives GHS05 Skull and Crossbones Acute Toxicity GHS06 Health Hazard GHS08
GHS Hazard Statements	H226:Flammable liquids H314:Skin corrosion/irritation H331:Acute toxicity,inhalation H370:Specific target organ toxicity, single exposure H372:Specific target organ toxicity, repeated exposure H412:Hazardous to the aquatic environment, long-term hazard
Precautionary Statement Codes	P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P273:Avoid release to the environment. P280:Wear protective gloves/protective clothing/eye protection/face protection. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

COMPUTED DESCRIPTORS

Molecular Weight	91.15 g/mol
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	1
Rotatable Bond Count	0
Exact Mass	91.099714038 g/mol
Monoisotopic Mass	91.099714038 g/mol
Topological Polar Surface Area	1 Å²
Heavy Atom Count	6
Formal Charge	0
Complexity	19.1
Isotope Atom Count	0
Defined Atom Stereocenter Count	0
Undefined Atom Stereocenter Count	0
Defined Bond Stereocenter Count	0
Undefined Bond Stereocenter Count	0
Covalently-Bonded Unit Count	2
Compound Is Canonicalized	Yes

PRODUCT INTRODUCTION

description

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