Tetramethylammonium hydroxide

  • N,N,N-Trimethylmethanaminium hydroxide
  • Methanaminium
Formula
(CH3)4NOH
Structure
Description
Tetramethylammonium hydroxide is a solid in the hydrated form or a colorless liquid with a strong ammonia-like odor.

Registry Numbers and Inventories.
CAS
75-59-2
EC (EINECS/ELINCS)
200-882-9
R 10 23/25 35 51
S 7 26 36/37/39 45
RTECS
PA0875000
RTECS class
Other
UN (DOT)
1835
Merck
12,9363
Beilstein/Gmelin
3558708
Beilstein Reference
4-04-00-00145
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C4H12N*HO
Formula mass
91.15
Vapor pressure, mmHg
18 (25 C)
Vapor density (air=1)
6.3
Evaporization number
0.4 (butyl acetate=1)
Density
1.016 g/cm3 (25 C)
Solubility in water
Miscible
Refractive index
1.38 (20 C)

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Build dikes to contain flow as necessary.
Stability
No data.
Incompatibilities
Avoid contact with strong acids and oxidizing agents. Attacks many plastics and rubber. May react with metallic aluminum and generate hydrogen gas.
Decomposition
Above the flash point, explosive vapor-air mixtures may be formed.

Fire.
Upper exp. limit, %
36
Lower exp. limit, %
6.7
Fire fighting
Do not extinguish fire unless flow can be stopped. Use water in flooding quantities as fog. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Solid streams of water may be ineffective. Use alcohol foam, dry chemical or carbon dioxide.
Fire potential
May burn but does not ignite readily.
Hazards
When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards. May polymerize explosively when heated or involved in a fire. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated. Runoff may pollute waterways. Substance may be transported in a molten form.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
3
 
Flammability
3
 
 
Reactivity
0
 

Health.
Exposure effects
   Ingestion
See Inhalation.
   Inhalation
TOXIC; inhalation, ingestion, or skin contact with material may cause severe injury or death. Effects of contact or inhalation may be delayed.
   Skin
Contact with molten substance may cause severe burns to skin and eyes. See Inhalation.
   Eyes
See Inhalation.

First aid
 
   Ingestion
Seek medical assistance.
   Inhalation
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult.
   Skin
Remove and isolate contaminated clothing and shoes. Immediately flush with running water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin.
   Eyes
Immediately flush with running water for at least 20 minutes.

Transport.
UN number
1835
Response guide
Hazard class
8
Packing Group
II
 
Std. Transport #
4935680