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Hydrobromic Acid

Updated: 2026-07-15

Overview

Hydrobromic acid is an aqueous solution of hydrogen bromide (HBr), classified as a strong mineral acid. It is commercially available in concentrations typically ranging from 48% to 68%. The acid plays a vital role in organic and inorganic chemistry due to its reactive bromide ion. Industrially, hydrobromic acid is produced by dissolving hydrogen bromide gas in water or as a byproduct of bromine manufacturing processes. Its purity and concentration significantly impact its applications, with pharmaceutical-grade solutions requiring stringent quality control.

Physical and Chemical Properties

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As a strong acid, hydrobromic acid completely dissociates in water, making it highly reactive. Its 48% solution forms a constant-boiling azeotrope at 126°C. The acid exhibits reducing properties and reacts vigorously with bases, metals, and oxidizing agents. The density and viscosity vary with concentration. At 48% concentration, it has a density of approximately 1.49 g/cm³. Hydrobromic acid fumes in moist air due to the release of hydrogen bromide gas, requiring careful handling to prevent atmospheric contamination.

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Main Applications

In pharmaceuticals, hydrobromic acid serves as a catalyst and reagent for synthesizing brominated compounds and active pharmaceutical ingredients (APIs). It's particularly valuable in producing sedatives, analgesics, and other specialty chemicals. The chemical industry utilizes hydrobromic acid for manufacturing bromine compounds, including zinc bromide for oil drilling fluids and silver bromide for photographic materials. It also functions as an etchant in semiconductor manufacturing and a purification agent in metallurgy.

Safety and Storage

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Hydrobromic acid requires corrosion-resistant containers made of glass, PTFE, or certain plastics. Storage areas must be well-ventilated and separated from incompatible materials like bases and oxidizing agents. Secondary containment is recommended to prevent spills. Personnel must wear acid-resistant gloves, face shields, and vapor respirators when handling. In case of exposure, immediate flushing with water and medical attention are critical. Spill response kits with neutralizing agents should be readily available in storage and work areas.

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B2B Procurement Guide

When sourcing hydrobromic acid, verify the supplier's compliance with regional chemical regulations (REACH, TSCA, etc.). Key specifications to confirm include concentration (typically 48% or 62%), impurity levels (especially heavy metals), and packaging (usually 25-250kg drums or bulk tanks). For pharmaceutical applications, request USP or EP grade certifications. Consider suppliers with ISO 9001 certification and proper hazardous material transportation credentials. Pricing varies based on order volume, with bulk purchases (tonnage quantities) offering 15-30% cost reductions compared to drum quantities.

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