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Trimethylaluminium

Outline Main application Category Toxicity grading Acute toxicity Flammability hazard characteristics Storage Characteristics Extinguishing agent Occupational standards
Trimethylaluminium
Trimethylaluminium structure
CAS No.
75-24-1
Chemical Name:
Trimethylaluminium
Synonyms
ATM;TMA;(CH3)3Al;A-T mutated;Trimethylalane;trimethyl-alane;Trimethylalumine;trimethyl-aluminu;TRIMETHYLALUMINUM;aluminiumtrimethyl
CBNumber:
CB5374238
Molecular Formula:
C3H9Al
Formula Weight:
72.09
MOL File:
75-24-1.mol

Trimethylaluminium Properties

Melting point:
15 °C
Boiling point:
126 °C
Density 
0.81 g/mL at 25 °C
vapor pressure 
69.3 mmHg ( 60 °C)
Flash point:
40 °F
storage temp. 
0-6°C
solubility 
Soluble in aromatic, saturated aliphatic and cycloaliphatic hydrocarbons.
form 
Liquid
color 
Clear colorless
Odor
Corrosive odor and "taste" may be detectable from trimethylaluminum fires
Water Solubility 
REACTS
Sensitive 
Air & Moisture Sensitive
BRN 
3587197
CAS DataBase Reference
75-24-1(CAS DataBase Reference)
NIST Chemistry Reference
Trimethylaluminum(75-24-1)
EPA Substance Registry System
Aluminum, trimethyl-(75-24-1)
SAFETY
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
  • NFPA
Hazard Codes  F,C,N
Risk Statements  11-14-17-34-50/53-65-67-14/15-63-48/20-51/53-20-62
Safety Statements  26-36/37/39-45-61-62-6A-43A-24/25-16-43-60-33-25-24
RIDADR  UN 3399 4.3/PG 1
WGK Germany  3
RTECS  BD2204000
1-10
Autoignition Temperature Spontaneously ignites in air (even as a frozen solid)
TSCA  Yes
HazardClass  4.3
PackingGroup  I
HS Code  29319090
Toxicity TLV-TWA (ACGIH) 2 mg (Al)/m3
Symbol(GHS):
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H225 Highly Flammable liquid and vapour Flammable liquids Category 2 Danger P210,P233, P240, P241, P242, P243,P280, P303+ P361+P353, P370+P378,P403+P235, P501
H250 Catches fire spontaneously if exposed to air Pyrophoric liquids; Pyrorophoric solids Category 1 Danger P210, P222, P280, P302+P334,P370+P378, P422
H260 In contact with water releases flammable gases which may ignite spontaneously Substances And Mixtures Which, In Contact With Water,Emit Flammable Gases Category 1 Danger P223, P231+P232, P280, P335+ P334,P370+P378, P402+P404, P501
H304 May be fatal if swallowed and enters airways Aspiration hazard Category 1 Danger
H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501
H318 Causes serious eye damage Serious eye damage/eye irritation Category 1 Danger P280, P305+P351+P338, P310
H336 May cause drowsiness or dizziness Specific target organ toxicity,single exposure; Narcotic effects Category 3 Warning P261, P271, P304+P340, P312,P403+P233, P405, P501
H361 Suspected of damaging fertility or the unborn child Reproductive toxicity Category 2 Warning P201, P202, P281, P308+P313, P405,P501
H373 May cause damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 2 Warning P260, P314, P501
H410 Very toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 1 Warning P273, P391, P501
H411 Toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 2
Precautionary statements:
P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P223 Keep away from any possible contact with water, because of violent reaction and possible flash fire.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P231+P232 Handle under inert gas. Protect from moisture.
P331 Do NOT induce vomiting.
P301+P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.
P302+P334 IF ON SKIN: Immerse in cool water/wrap in wet bandages.
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.
P370+P378 In case of fire: Use … for extinction.
P405 Store locked up.
P422 Store contents under …

NFPA 704

Diamond Hazard Value Description
3
3
Health  
Flammability   3 Liquids and solids (including finely divided suspended solids) that can be ignited under almost all ambient temperature conditions . Liquids having a flash point below 22.8 °C (73 °F) and having a boiling point at or above 37.8 °C (100 °F) or having a flash point between 22.8 and 37.8 °C (73 and 100 °F). (e.g. gasoline, acetone)
Instability   3 Capable of detonation or explosive decomposition but requires a strong initiating source, must be heated under confinement before initiation, reacts explosively with water, or will detonate if severely shocked (e.g. ammonium nitrate, cesium, hydrogen peroxide)
Special  

(NFPA, 2010)

Trimethylaluminium price More Price(26)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 198048 Trimethylaluminum solution 2.0 M in toluene 75-24-1 1l $335 2018-11-13 Buy
Sigma-Aldrich 198048 Trimethylaluminum solution 2.0 M in toluene 75-24-1 8l $1370 2018-11-13 Buy
Alfa Aesar 042836 Trimethylaluminum 25% w/w in hexane 75-24-1 100ml $52.4 2018-11-20 Buy
Alfa Aesar 042836 Trimethylaluminum 25% w/w in hexane 75-24-1 500ml $171 2018-11-20 Buy
Strem Chemicals 93-1360 Trimethylaluminum, min. 98% 75-24-1 100g $198 2018-11-13 Buy

Trimethylaluminium Chemical Properties,Uses,Production

Outline

Trimethylaluminum is called TMA for short. Trimethylaluminum was prepared by Buckton for the first time using methyl mercury and aluminum in 1865, but until the 1950s, TMA applications has been still limited to the scope of laboratory, its research and application was far less active than organic magnesium and organic lithium for a long time. In recent years, with the development of the research of polyolefins, TMA is as one of the cocatalyst, and starting raw materials for synthesis of cocatalyst catalysts methylalumoxane (of MAO) and modified methylaluminoxane (MMAO) in metallocene catalyst systems. In the organic chemical industry, especially polymer chemical industry, its importance began to appear.
At normal temperature and pressure, trimethyl aluminum is a colorless transparent liquid, highly reactive, spontaneous combustion in the air, and instantly be able to fire, reacts violently with alcohol and acids which have an active hydrogen, reacts violently with water, even in cold water explosive decomposition reaction can be produced, and also generates methane, and sometimes can catch fire. At 300 ℃ it slowly decompose to produce methane. It can form stable complexes with AsH3, PH3, ethers, tertiary amines and other Lewis bases, miscible in any proportion with alicyclic hydrocarbons such as hexane and heptane, aromatic hydrocarbon such as toluene, xylene. diluted to below 25% with a hydrocarbon-based solvent, trimethyl aluminum loses its spontaneous combustion.

Main application

There is an important use for trimethyl aluminum in organic catalytic chemistry, organic synthesis and polymer chemistry industry and other aspects.
Trimethylaluminum acts with water of a suitable form, may form highly reactive methylaluminoxane (MAO), which is one of the most important co-catalyst of the metallocene catalyst system. The maximum use of MAO is to form a coordination catalyst, such as with the halide of titanium, zirconium, hafnium to form a catalyst system, which can result in stereospecific polymerization, copolymerization, oligomerization of olefins. It can form catalyst with the compound of transition metal element such as nickel, cobalt, etc, which can result in lower poly, disproportionation, isomerization of olefins. Further, trimethyl aluminum itself may be used to catalyze the reaction.
TMA can be carried out oligomerization with ethylene to produce high-carbon aluminum alkyl, after oxidation and hydrolysis of the latter to form a straight-chain higher primary alcohols and advanced a-olefins. Organoaluminum is not only inexpensive, but also has high reaction activity, thus organoaluminum is commonly used for preparing other metals organic compounds, for example the reaction of TMA with stannic chloride can be prepared to produce methyl tin. TMA can also be used as mild reducing agent for high stereoselectivity reagents, vitamins, hormones and other drug synthetic. In recent years, the formation of a metal film is achieved by application of metal organic chemical vapor deposition method. As with the hydrogen carrying TMA, the substrate is heated for thermal decomposition to form a metal thin film of aluminum.
In the aerospace industry, and trimethyl aluminum can be used as liquid fuel of rockets. TMA can also be used as an important alkylating agent in organic synthesis of fine chemical industry.
As olefin polymerization catalyst, pyrophoric fuel, also used for making straight-chain primary alcohols and olefins, etc, it can be used for metal organic chemical vapor deposition.
The above information is edited by the chemicalbook of Yan Yanyong.

Category

Spontaneous Combustion items

Toxicity grading

Toxic

Acute toxicity

Oral-rat LD50: 10000 mg/cubic meter/15 minutes

Flammability hazard characteristics

In case of air, chlorine, oxidizers, high temperature can be spontaneous, emit toxic aluminide gases.

Storage Characteristics

Treasury ventilation low-temperature drying, package with nitrogen charging, and stored separately from oxidants

Extinguishing agent

Dry sand, powder, mountain flour

Occupational standards

TWA 2 mg(AL)/cubic meter

Chemical Properties

clear colorless solution

Chemical Properties

The aluminum alkyls are highly flammable and reactive, colorless to yellow liquids at room temperature. The lighter trialkylaluminums ignite spontaneously in air. They are normally supplied and used in a 20% solution with a hydrocarbon solvent, such as hexane, heptane, benzene, toluene. Properties may depend on solvent. Reacts violently with water.

Uses

Trimethylaluminium can be used as catalyst for olefin polymerization, pyrophoric fuel, manufacture of straight-chain primary alcohols and olefins, to produce luminous trails in upper atmosphere to track rockets.

Uses

Trimethyl aluminum is a highly reactivereducing and alkylating agent. It is used in aZiegler-Natta catalyst for polymerization andhydrogenation.

Definition

A colorless liquid produced by the sodium reduction of dimethyl aluminum chloride. It ignites spontaneously on contact with air and reacts violently with water, acids, halogens, alcohols, and amines. Aluminum alkyls are used in the Ziegler process for the manufacture of high-density polyethene.

Health Hazard

As it is pyrophoric and reacts explosivelywith moisture, skin contact can cause a dangerousburn. Contact with eyes can causeblindness. Because of its significant volatility,the risk of inhalation of this compoundis higher than with most other alkyls. Inhalationof its vapors can severely damage therespiratory tract.
TLV-TWA: 2 mg(Al)/m3 (ACGIH).

Health Hazard

Trimethylaluminum and related alkylaluminum reagents are pyrophoric materials that can react explosively with the moisture in tissues, causing severe burns. The heat of reaction can also ignite the methane gas generated, resulting in thermal burns. Alkylaluminum reagents are corrosive substances, and contact is extremely destructive to the eyes, skin, and mucous membranes. Inhalation of trimethylaluminum and other volatile alkylaluminum compounds may cause severe damage to the respiratory tract and can lead to fatal pulmonary edema.

Health Hazard

Trimethylaluminum and related alkylaluminum reagents are pyrophoric materials that can react explosively with the moisture in tissues, causing severe burns. The heat of reaction can also ignite the methane gas generated, resulting in thermal burns. Alkylaluminum reagents are corrosive substances, and contact is extremely destructive to the eyes, skin, and mucous membranes. Inhalation of trimethylaluminum and other volatile alkylaluminum compounds may cause severe damage to the respiratory tract and can lead to fatal pulmonary edema.

Fire Hazard

Trimethylaluminum is pyrophoric and burns violently on contact with air or water. Other alkylaluminum reagents show similar behavior, although most are not as volatile as trimethylaluminum. Water or CO2 fire extinguishers must not be used to put out fires involving trialkylaluminum reagents. Instead, dry chemical powders such as bicarbonate, Met-L-X?, or inert smothering agents such as sand or graphite should be used to extinguish fires involving trialkylaluminum compounds.

Fire Hazard

Trimethylaluminum is pyrophoric and burns violently on contact with air or water. Other alkylaluminum reagents show similar behavior, although most are not as volatile as trimethylaluminum. Water or CO2 fire extinguishers must not be used to put out fires involving trialkylaluminum reagents. Instead, dry chemical powders such as bicarbonate, Met-L-X?, or inert smothering agents such as sand or graphite should be used to extinguish fires involving trialkylaluminum compounds.

Flammability and Explosibility

Trimethylaluminum is pyrophoric and burns violently on contact with air or water. Other alkylaluminum reagents show similar behavior, although most are not as volatile as trimethylaluminum. Water or CO2 fire extinguishers must not be used to put out fires involving trialkylaluminum reagents. Instead, dry chemical powders such as bicarbonate, Met-L-X?, or inert smothering agents such as sand or graphite should be used to extinguish fires involving trialkylaluminum compounds.

Potential Exposure

Alkyl aluminum compounds are used as components of olefin polymerization catalysts. They are also used in the synthesis of higher primary alcohols and in pyrophoric fuels, as a catalyst in making ethylene gas; and in plating aluminum.

First aid

I If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 minutes, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit.

storage

Safety glasses, impermeable gloves, and a fire-retardant laboratory coat should be worn at all times when working with these compounds. Trialkylaluminum reagents should be handled only under an inert atmosphere.

Shipping

ntial fire or explosion hazard. Shipping: UN3399 Organometallic substance, liquid, water-reactive, flammable, Hazard Class: 4.3; Labels: 4.3 Dangerous Dangerous when wet material, 3-Flammable liquid, technical name Required. UN3051-Spontaneously combustible. Also, this material is dangerous when wet. (Note: this number does not appear in the 49/CFR HazMat tables).

Incompatibilities

The lighter trialkylaluminums ignite spontaneously in air; can self-heat in the air at room temperature without any added energy and may ignite. These compounds are strong reducing agents. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides. Incompatible with water, oxygen (air), acids, alcohols, phenols, amines, carbon dioxide; sulfur oxides; halogenated compounds, and many other substances

Waste Disposal

Careful incineration

Trimethylaluminium Preparation Products And Raw materials

Raw materials

Preparation Products


Trimethylaluminium Suppliers

Global( 129)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Henan DaKen Chemical CO.,LTD.
+86-371-55531817
info@dakenchem.com CHINA 21990 58
Henan Tianfu Chemical Co.,Ltd.
0371-55170693
0371-55170693 info@tianfuchem.com CHINA 20680 55
Mainchem Co., Ltd.
+86-0592-6210733
+86-0592-6210733 sales@mainchem.com CHINA 32457 55
Chemwill Asia Co.,Ltd.
86-21-51086038
86-21-51861608 chemwill_asia@126.com;sales@chemwill.com;chemwill@hotmail.com;chemwill@gmail.com CHINA 24001 58
career henan chemical co
+86-371-86658258
sales@coreychem.com CHINA 19923 58
J & K SCIENTIFIC LTD. 400-666-7788 +86-10-82848833
+86-10-82849933 jkinfo@jkchemical.com;market6@jkchemical.com China 96815 76
Xunteng International Trading Co.,Limited
sales@xuntengchem.com China Hong Kong 880 55
Infinity SCI 400-106-2016
sales@infsci.com China 11214 55
Nanjing Spcscientific Technology Co., Ltd. 18994006456
sales1@spcscientific.com China 824 58
Huangshi Bo’Er Chemical Co., Ltd. 0714-6401888 18671400300
0714-6401888 273568016@qq.com China 336 58

View Lastest Price from Trimethylaluminium manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2018-12-16 Trimethylaluminium
75-24-1
US $1.00 / g 1kg 98% 10KG career henan chemical co

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