Aluminum chloride

CAS Number
7446-70-0
EC Number
231-208-1
Chemical Formula
AlCl3
Molecular Weight
133.34 g/mol

Description

Aluminum chloride anhydrous (CAS 7446-70-0), also known as aluminum trichloride, is a high-activity Lewis acid catalyst and inorganic salt used across chemical synthesis, water treatment, and industrial processing. Its strong electrophilic character makes it a preferred reagent wherever controlled catalytic activity or coagulation is required at scale. In petrochemical and organic synthesis, it drives Friedel-Crafts alkylation and acylation reactions.

This chemical forms the basis for producing dyes, pharmaceuticals, and specialty chemicals. Water treatment facilities use it as a coagulant to aggregate suspended solids and colloidal matter, improving clarification efficiency. It is effective in both municipal and industrial effluent systems. The textile and leather industries apply it as a preservative and mordant, fixing dyes to fiber substrates and extending material durability.

In pharmaceutical manufacturing, it functions as a catalyst intermediate in active ingredient synthesis where precise Lewis acid reactivity is required. This ensures high yields and purity in complex chemical reactions. Aluminum chloride anhydrous is supplied as a granular or lumpy crystalline solid, with powder forms available for specific process requirements. Standard commercial grades include technical grade for industrial catalysis.

Handling and packaging specifications typically account for its moisture sensitivity. Supply is provided in sealed, inert-atmosphere containers ranging from drum to bulk quantities to maintain product integrity during transport.

Other Names (Synonyms)

aluminum trichloride|aluminium chloride|aluminum chloride anhydrous|Aluminium trichloride|AlCl3|Pearsall|Aluminum chloride (AlCl3)

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
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Physical Properties

Melting Point 192.6 °C
Boiling Point 182.7 °C @ Press: 752 Torr
Density 2.48 g/cm³
Flash Point 88 °C
Appearance Aluminum chloride is a noncombustible but highly reactive whitish-gray, yellow, or green powder or liquid. Strong, acidic, irritating odor like hydrochloric acid
Color Yellow to gray
Odor Hydrogen chloride odor detectable when exposed to moist air
Form powder
Water Solubility reacts
Vapor Pressure 1 mm Hg ( 100 °C)
pH 2.4 (100g/l, H2O, 20℃)

Documentation

Safety & Handling Learn More

Danger
GHS05· Corrosive GHS07· Irritant GHS08· Health Hazard GHS09· Environmental Hazard

Hazard Statements

H290 May be corrosive to metals
H302 Harmful if swallowed
H314 Causes severe skin burns and eye damage
H315 Causes skin irritation

Precautionary Statements

P203 Obtain, consult and follow expert instructions for use.
P234 Keep only in original packaging.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.

Trade & Regulatory

HS Code 28273200
UN Number 3264
ADR Class 8
Packing Group III
Storage Class 8A - Combustible corrosive hazardous materials
WGK (Germany) 1
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