Agent Name


CAS Number




Major Category



Aluminum, dichloroethyl-; Dichloromonoethylaluminum; Ethyl aluminum dichloride; Ethylaluminum dichloride; Ethyldichloroaluminum; [ChemIDplus] EADC; [HSDB] UN3051


Metals, Organic Compounds


Colorless liquid; [Sullivan, p. 979] Clear yellow liquid; mp = 31 deg C; [HDSB] Clear deep yellow liquid; mp = 32 deg C; [MSDSonline]


Used as a polymerization catalyst, for aromatic hydrogenation, and as an intermediate; [HSDB] Organic aluminum compounds are "some of the most important, highest volume, highest value organometallic compounds in production." [Ullmann]


Aluminum alkyl halides release large amounts of HCl when spilled in water; [ERG 2012] Ignites in air and reacts violently with water producing HCl and aluminum oxide; [Sullivan, p. 979] Reacts violently with water; May spontaneously ignite in air; A skin irritant; [HSDB] Highly flammable; Ignites on exposure to air; Reacts violently with water or moisture evolving hydrogen chloride and flammable ethane; Can cause severe burns to skin and eyes; [CAMEO] Pyrophoric; Reacts violently with water evolving extremely flammable gases; A corrosive substance that can cause injury to the skin, eyes, and respiratory tract; Inhalation may cause chemical pneumonitis and pulmonary edema; [MSDSonline] Organoaluminum compounds are corrosive; Harmful if absorbed through the skin or inhaled; The butyl alkyls and below are pyrophoric; Aluminum alkyls are eye irritants; [HSDB] Organic aluminum compounds can cause irritation or burns, depending upon concentration; [Ullmann] TLV withdrawn for aluminum alkyls because of inadequate toxicological data; [ACGIH] See "Aluminum." See "ORGANOMETALS."

Exposure Assessment
Dangerous When Wet

Yes - A material that, by contact with water, is liable to become spontaneously flammable or to give off flammable or toxic gas at a rate greater than 1 L per kilogram of the material, per hour; [ERG 2004]

Explanatory Notes

The Guide in the Emergency Response Guidebook is for "Aluminum alkyls." VP = 10 mm Hg at 80 deg C; [eChemPortal: HPVIS]

Flammability (NFPA)

4: Burns readily

Adverse Effects
Toxic Pneumonitis



Skin Burns

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information


Chemical Information

Search ChemIDplus

Related Information in HazMap

Occupational diseases associated with exposure to this agent:


Industrial Processes with risk of exposure: