Overview
1,2-Dibromoethane is an organobromine compound first synthesized in the 19th century. Historically significant as a lead scavenger in tetraethyllead gasoline additives, its use has declined due to environmental regulations. Today, it serves niche roles in chemical synthesis and specialty applications, though its toxicity requires strict handling protocols. The compound's production typically involves bromination of ethylene. While global production has decreased since the phase-out of leaded gasoline, it remains commercially available for licensed industrial uses under controlled conditions.
Physical and Chemical Properties
As a dense, non-flammable liquid, 1,2-dibromoethane exhibits limited water solubility but readily mixes with most organic solvents. Its high density (2.18 g/cm³) makes it useful in separation processes. The compound decomposes at temperatures above 130°C, releasing toxic hydrogen bromide gas. Chemically, it undergoes nucleophilic substitution reactions, making it valuable for introducing ethylene bridges in organic synthesis. The bromine atoms render it highly reactive toward reducing agents and alkali metals, requiring careful compatibility assessments in industrial processes.
Main Applications
In modern industry, 1,2-dibromoethane primarily functions as: (1) An intermediate in pharmaceutical and agrochemical synthesis, (2) A restricted fumigant for soil and grain treatment (subject to national regulations), and (3) A lead scavenger in aviation gasoline (100LL) for piston-engine aircraft. Emerging applications include its use in microscopic analysis as a heavy liquid for mineral separation. However, many historical uses (e.g., textile processing) have been discontinued due to toxicity concerns and the development of safer alternatives.
Safety and Storage
Classified as a Category 2 carcinogen by the European Union, 1,2-dibromoethane requires comprehensive safety measures. Storage must be in corrosion-resistant containers (stainless steel or glass-lined) with secondary containment to prevent environmental release. Facilities should maintain vapor detection systems due to its low odor threshold (0.5 ppm). Emergency procedures must address both liquid spills (absorb with inert material) and fire scenarios (use dry chemical suppressants). Worker protection mandates chemical-resistant gloves (e.g., butyl rubber), goggles, and supplied-air respirators for concentrations above permissible exposure limits (OSHA PEL: 20 ppm).
B2B Procurement Guide
When sourcing 1,2-dibromoethane, buyers should: (1) Verify supplier compliance with regional chemical regulations (e.g., REACH authorization in EU), (2) Request full SDS documentation including impurity profiles, and (3) Confirm transportation certifications (UN 1605, Class 6.1). Bulk purchases (drum or ISO tank quantities) typically offer 10-15% cost savings over small containers. Consider proximity sourcing to minimize transport risks. Technical grade (98% purity) suffices for most industrial applications, while analytical grade (99.5%+) commands premium pricing for laboratory use.
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