Pharmaceutical Materials

CAS Number: 75-24-1

Molecular Formula: C3H9Al

Molecular Weight: 72.09

Appearance: Colorless transparent

liquid Melting Point: 15°C

Boiling Point: 126°C

Density: 0.81 g/mL at 25°C

Usage: Used as a catalyst in olefin polymerization and in the production of semiconductor materials.

Name	Trimethylaluminium
Synonyms	TMA trimethyl-alane Trimethylalumine trimethyl-aluminu Trimethylaluminum Trimethylaluminium Trimethylaluminum solution Trimethylaluminiummincolorlessliquid TrimethylaluminumelecgrPURATREMcolorlessliq trimethylaluminum steel flask 0.3 L (net ~150 G)

Physico-chemical Properties

Molecular Formula	C3H9Al
Molar Mass	72.09
Density	0.81g/mLat 25°C
Melting Point	15 °C
Boling Point	126 °C
Flash Point	40°F
Water Solubility	REACTS
Solubility	Soluble in aromatic, saturated aliphatic and cycloaliphatic hydrocarbons.
Vapor Presure	69.3 mmHg ( 60 °C)
Appearance	Liquid
Specific Gravity	0.688
Color	Clear colorless
Odor	Corrosive odor and “taste” may be detectable from trimethylaluminum fires
Exposure Limit	ACGIH: TWA 50 ppm (Skin)OSHA: TWA 500 ppm(1800 mg/m3)NIOSH: IDLH 1100 ppm; TWA 50 ppm(180 mg/m3)
BRN	3587197
Storage Condition	0-6°C
Sensitive	Air & Moisture Sensitive
Physical and Chemical Properties	At room temperature and atmospheric pressure, trimethyl aluminum is a colorless transparent liquid, with strong reactivity, spontaneous combustion in the air, instant ignition, intense reaction with alcohol and acid with active hydrogen, and intense reaction with water, even in cold water, an explosive decomposition reaction can be produced, and methane and sometimes a fire can be generated. Methane is slowly decomposed at 300 °c. Stable complexes are formed with AsH3, PH 3, ethers, tertiary amines and other Lewis bases. It can be miscible with aliphatic hydrocarbons such as hexane and heptane and aromatic hydrocarbons such as toluene and xylene in any proportion. Trimethylaluminum, which is released to less than 25% of the alkene using a hydrocarbon-based solvent, loses its pyrophoricity.

Risk and Safety

Risk Codes	R11 – Highly Flammable R14 – Reacts violently with water R17 – Spontaneously flammable in air R34 – Causes burns R50/53 – Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R65 – Harmful: May cause lung damage if swallowed R67 – Vapors may cause drowsiness and dizziness R14/15 – R63 – Possible risk of harm to the unborn child R48/20 – R51/53 – Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R20 – Harmful by inhalation R62 – Possible risk of impaired fertility
Safety Description	S26 – In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 – Wear suitable protective clothing, gloves and eye/face protection. S45 – In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S61 – Avoid release to the environment. Refer to special instructions / safety data sheets. S62 – If swallowed, do not induce vomitting; seek medical advice immediately and show this container or label. S6A – S43A – S24/25 – Avoid contact with skin and eyes. S16 – Keep away from sources of ignition. S43 – In case of fire use … (there follows the type of fire-fighting equipment to be used.) S60 – This material and its container must be disposed of as hazardous waste. S33 – Take precautionary measures against static discharges. S25 – Avoid contact with eyes. S24 – Avoid contact with skin.
UN IDs	UN 3399 4.3/PG 1
WGK Germany	3
RTECS	BD2204000
FLUKA BRAND F CODES	1-10
TSCA	Yes
HS Code	29319090
Hazard Class	4.3
Packing Group	I
Toxicity	TLV-TWA (ACGIH) 2 mg (Al)/m3

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