Trichloroalumane

AlCl3

trichloroalumane

CAS7446-70-0
GHS05 Gefahrensymbol: Ätzend – Ätzwirkung
Danger

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Identification

CAS Number
7446-70-0
EC Number
231-208-1
UN Number
1726
Index Number
013-003-00-7
PubChem CID
24012

Physical-chemical properties

Molecular Formula
AlCl3
Molar Mass
133.34 g/mol
IUPAC Name
trichloroalumane

Chemical Identifiers

InChI
InChI=1S/Al.3ClH/h;3*1H/q+3;;;/p-3
InChI Key
VSCWAEJMTAWNJL-UHFFFAOYSA-K

Overview

Trichloroalumane (CAS 7446-70-0) is an inorganic aluminum halide compound with strong Lewis acid properties and high reactivity with water. This aluminum chloride compound serves as a versatile chemical intermediate in numerous industrial processes. With the molecular formula AlCl3 and a molecular weight of 133.34 g/mol, trichloroalumane appears as a white to pale yellow crystalline solid that readily sublimes at elevated temperatures. The compound is highly hygroscopic, meaning it absorbs moisture from air rapidly, forming hydrochloric acid vapors upon contact with water vapor. From a safety perspective, trichloroalumane is classified as Skin Corr. 1B under GHS regulations, requiring the "Danger" signal word and corrosion pictogram GHS05. As an ADR Class 8 substance, it demands careful handling protocols due to its corrosive nature. The compound can cause severe skin burns and eye damage upon contact, necessitating appropriate personal protective equipment during handling and storage in moisture-free environments. Industrially, trichloroalumane finds primary application as a Friedel-Crafts catalyst in organic synthesis, particularly in alkylation and acylation reactions. It also serves as a catalyst in petroleum refining processes and as a precursor for aluminum metal production through electrolytic reduction. Unlike simpler organic acids such as butanoic acid or heptanoic acid, trichloroalumane's Lewis acid character makes it invaluable for promoting carbon-carbon bond formation reactions in pharmaceutical and fine chemical manufacturing. OYSI maintains reliable supply chains for trichloroalumane, ensuring consistent availability for European industrial customers requiring this essential aluminum compound.

Safety & Classification

Danger
Classification:

Skin Corr. 1B

HHazard Statements (H-Statements)

Describe the nature and severity of the hazard

H314

Causes severe skin burns and eye damage.

Classification according to CLP Regulation (EC) No 1272/2008. The complete list of hazard and precautionary statements can be found in the Safety Data Sheet (SDS).

First Aid Measures

Skin Contact

Harmful

Measures if substance contacts the skin

First Aid Actions

  • +P302IF ON SKIN:
  • +P352Wash with plenty of water.
  • +P361Take off immediately all contaminated clothing.
  • +P313Get medical advice/attention.

Related hazard statements:

Eye Contact

Harmful

Measures if substance gets into the eyes

First Aid Actions

  • +P305IF IN EYES:
  • +P351Rinse cautiously with water for several minutes.
  • +P338Remove contact lenses, if present and easy to do. Continue rinsing.
  • +P313Get medical advice/attention.

Related hazard statements:

General Measures

Emergency 112 | Poison Control: +49 30 19240 (DE), +33 1 45 42 59 59 (FR), +31 30 274 88 88 (NL)

First aid measures are based on CLP classification and associated P-statements. They do not replace the Safety Data Sheet (SDS). In case of emergency, always consult the full SDS and a physician.

Transport (ADR)

UN Number1726
ADR Class8
Packing GroupII
Tunnel CodeE
Proper Shipping NameAluminiumchlorid, wasserfrei, fest
Marine PollutantNo

Frequently Asked Questions

What is trichloroalumane?

Trichloroalumane is an inorganic chemical compound with the formula AlCl3 and CAS number 7446-70-0. This aluminum chloride has a molecular weight of 133.34 g/mol and appears as a white to pale yellow crystalline solid. It is classified as a corrosive substance (Skin Corr. 1B) under the GHS system, requiring careful handling due to its aggressive chemical properties and potential to cause severe skin and eye damage upon contact.

What are the physicochemical properties of trichloroalumane?

Trichloroalumane exists as a white to pale yellow crystalline solid at room temperature with no characteristic odor when pure. It has a melting point of approximately 192°C and sublimes at higher temperatures. The compound is highly hygroscopic, readily absorbing moisture from air and reacting vigorously with water to form hydrochloric acid and aluminum hydroxide. It is soluble in polar organic solvents and exhibits strong Lewis acid properties.

What is trichloroalumane used for?

Trichloroalumane serves as a crucial catalyst in various industrial processes, particularly in Friedel-Crafts reactions for organic synthesis and polymerization. It is extensively used in the production of aluminum metal through electrolytic processes, in the manufacture of pharmaceuticals, dyes, and fragrances. Additionally, it finds applications in petroleum refining as a catalyst for cracking and isomerization reactions, and in the production of various aluminum compounds for industrial applications.

How to handle trichloroalumane safely?

Trichloroalumane requires strict safety protocols due to its corrosive nature (Skin Corr. 1B classification). Essential personal protective equipment includes chemical-resistant gloves, safety goggles, and protective clothing. Work must be conducted in well-ventilated areas or under fume hoods to prevent inhalation of vapors. Avoid contact with water and moisture, as this generates corrosive hydrochloric acid. Always have emergency eyewash stations and safety showers readily accessible when handling this substance.

How to store trichloroalumane correctly?

Trichloroalumane must be stored in tightly sealed, moisture-proof containers in a cool, dry, and well-ventilated area away from incompatible materials. Keep containers away from water, alcohols, and basic substances to prevent violent reactions. Storage areas should be equipped with appropriate spill containment measures and constructed of corrosion-resistant materials. Maintain temperatures below 25°C and ensure containers are properly labeled with hazard information and handling precautions.

What to do in case of contact with trichloroalumane?

Immediate action is critical due to trichloroalumane's corrosive properties. For skin contact, immediately remove contaminated clothing and flush the affected area with copious amounts of water for at least 15 minutes. In case of eye contact, rinse thoroughly with water for at least 15 minutes while holding eyelids open. If inhaled, move the person to fresh air immediately. Seek immediate medical attention in all cases of exposure and provide safety data sheet information to medical personnel.

How to dispose of trichloroalumane appropriately?

Trichloroalumane disposal must comply with local and international hazardous waste regulations due to its corrosive classification. The substance cannot be disposed of through regular waste streams and requires treatment by licensed hazardous waste disposal facilities. Small quantities can be carefully neutralized under controlled conditions by trained professionals, but this should never be attempted without proper expertise. Always consult local environmental authorities and follow established waste disposal protocols for corrosive materials.

How to transport trichloroalumane?

Trichloroalumane is classified as ADR Class 8 (corrosive substances) Packing Group II for transportation purposes. It must be packaged in UN-approved containers designed for corrosive materials and properly labeled with appropriate hazard placards. Transport vehicles must carry emergency response information and appropriate firefighting equipment. Drivers require ADR certification for dangerous goods transport, and shipments must comply with routing restrictions and quantity limitations established by transportation authorities.

Is trichloroalumane subject to particular regulations?

Trichloroalumane is subject to comprehensive chemical regulations including REACH registration requirements in Europe and CLP classification as a corrosive substance. It is not currently listed as a Substance of Very High Concern (SVHC), but its corrosive properties mandate strict compliance with occupational safety standards and environmental protection measures. Users must maintain safety data sheets, implement appropriate risk management measures, and ensure proper worker training and protection protocols are in place.

Where to buy trichloroalumane in Europe?

Trichloroalumane is available through OYSI, a established European distributor of technical chemicals serving industrial customers across the continent. OYSI provides comprehensive technical support, regulatory compliance documentation, and reliable supply chain management for this specialized chemical. As a professional chemical distributor, OYSI ensures proper packaging, labeling, and transportation compliance while offering technical expertise to support safe handling and application of trichloroalumane in industrial processes.

Data Sources

Classification per CLP Regulation (EC) No 1272/2008. Data from ECHA and PubChem.