Inorganic Acids & Bases
REACH
Hydrogen bromide
CAS Number
10035-10-6
EC Number
233-113-0
Abbreviation
HBr
What is Hydrogen bromide?
Hydrogen bromide (CAS 10035-10-6) is an inorganic acid, commercially handled as hydrobromic acid in aqueous solution.
Where is Hydrogen bromide used?
- Pharmaceutical manufacturing: production of active pharmaceutical ingredient salts
- Hydrobromide salts improve stability and solubility of amine-based drug compounds for solid dosage formulation
- Water treatment: bromination precursor generating hypobromous acid for microbiological control in cooling towers and process water
- Food-grade processing: pH-regulating agent
- Organic synthesis: brominating agent for agrochemical and specialty chemical intermediates
Good to know: The 48% concentration is the most commercially standard grade; technical, reagent and pharmaceutical grades (USP, Ph. Eur.) are available.
Commercial specifications
- 48% concentration, most commercially standard grade
- Technical, reagent and pharmaceutical grades (USP, Ph. Eur.)
- Packaging: drums, IBCs, bulk tankers
Other Names (Synonyms)
HBr|HYDROBROMIC ACID|Acido bromidrico|bromane|Acide bromhydrique|Hydrogen bromide (HBr)|Anhydrous hydrobromic acid|Hydrogen bromide (H2Br2)
What are the physical properties of Hydrogen bromide?
Melting Point -87 °C
Boiling Point -67 °C
Density 1.8 g/cm³
Flash Point 40°C
Appearance colourless liquid with a strong irritating odour
Color Light yellow, brown
Odor Sharp, irritating odor detectable at 2 ppm
Form Solution
Water Solubility soluble
Vapor Pressure 334.7 psi ( 21 °C)
Refractive Index n 20/D 1.438
pH 3.01(1 mM solution);2.04(10 mM solution);1.08(100 mM solution)
Log P 0.629 at 25℃
How is Hydrogen bromide classified and handled safely? Learn More
Danger
GHS04· Compressed Gas GHS05· Corrosive GHS07· Irritant GHS06· Toxic GHS08· Health Hazard
Hazard Statements
H280 H280
H314 H314
H318 H318
H331 H331
Precautionary Statements
P260 P260
P261 P261
P264 P264
P270 P270
Which trade and regulatory codes apply to Hydrogen bromide?
HS Code 28111990
UN Number 3265
ADR Class 8
Packing Group II
Storage Class 8B - Non-combustible corrosive hazardous materials
WGK (Germany) 1