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Hydrogen bromide chemical structure, HBr, CAS 10035-10-6
2D chemical structure

Key facts

What buyers check first

Appearance
Colorless gas
Melting point
-86.8 °C
Boiling point
-66.4 °C
Density
Relative density (water = 1): 1.8
Solubility
221 g/100 cc water at 0 °C, 130 g/100 cc water at 100 °C
HS code
281119
Category
Inorganic acids
UN number
UN 1788
Illustrative photo, a small gas cylinder with a regulator in a lab on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Hydrogen bromide?

Plain description, key identifiers and synonyms

Bromine atom is a halogen. It has a role as a micronutrient.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
bromane
CAS number
10035-10-6 CAS number cross-checked
EC number
233-113-0
Molecular formula
HBr
UNII
3IY7CNP8XJ
MDL number
MFCD00011323
INCI name
HYDROBROMIC ACID
InChIKey
CPELXLSAUQHCOX-UHFFFAOYSA-N
InChI
InChI=1S/BrH/h1H
SMILES (canonical and isomeric)
Br

Synonyms

  • Hydrobromic acid
  • bromane
  • Bromwasserstoff
  • Broomwaterstof
  • Bromowodor
  • Acido bromidrico
  • Acide bromhydrique
  • Hydrogen bromide (HBr)
  • Anhydrous hydrobromic acid
  • Hydrogen bromide, anhydrous
  • Acido bromhidrico
  • Hydrogen monobromide
  • Bromure d'hydrogene anhydre
  • Bromuro de hidrogeno anhidro
  • bromure d'hydrogene
  • Hydrogenbromid
  • Anhydrous hydrogen bromide
  • bromidohydrogen
  • Acid, Hydrobromic
  • Bromide, Hydrogen
  • Hydrobromicum Acidum
  • Aqueous hydrogen bromide
  • Hydrogen bromide (HBr2)
  • Hydrobromic Acid, anyhydrous
  • Hydrobromic Acid (47-48% in aqueous solution)
Show all 30 synonyms
  • HBR
  • hydrogenbromide
  • Hydrobromic acid, ACS reagent, 48%
  • Hydrobromic acid,48%
  • bromohydride

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Appearance
Colorless gasexp.
Odour
Sharp, irritating odorexp.
Taste
Fumes have a sour tasteexp.
Melting point
-86.8 °Cexp.
Boiling point
-66.4 °Cexp.
Density
Relative density (water = 1): 1.8exp.
Solubility
221 g/100 cc water at 0 °C, 130 g/100 cc water at 100 °Cexp.
Vapour pressure
18,410 mm Hg at 25 °Cexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
80.91 g/molcalc.
Exact mass
79.9262 Dacalc.
LogP (octanol/water)
0.58calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
1calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS04: Gas under pressure
Gas under pressure
GHS05: Corrosive
Corrosive
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H314Causes severe skin burns and eye damage.
  • H335May cause respiratory irritation.
Precautionary statements (16)
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P330 + P331If swallowed: Rinse mouth. Do not induce vomiting.
  • P302 + P361 + P354If on skin: Take off immediately all contaminated clothing. Immediately rinse with water for several minutes.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P354 + P338If in eyes: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P316Get emergency medical help immediately.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P363Wash contaminated clothing before reuse.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 1788
Transport hazard class
8
Packing group
II

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Hydrogen bromide suppliers

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Where suppliers are based

152 suppliers in 23 countries

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Hydrogen bromide price

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Uses and applications

What the substance is used for, by industry and function

Pharmaceutical intermediate. (Hydrogen bromide gas).

Isomerization of conjugated diolefins. (Hydrobromic acid).

Analytical chemistry, solvent for ore minerals. (Hydrobromic acid).

Hydrogen bromide is utilized in: production of inorganic bromides by reaction with the appropriate aqueous solution or slurry of metal hydroxides, oxides, or carbonates, production of organic bromides by reaction with alkyl alcohols or alkenes, reaction with alkynes to form bromoalkenes, opening epoxides and lactones, as a catalyst for oxidations, and alkylations and condensations in organic chemistry. (Hydrogen bromide gas).

Hydrobromic acid is used industrially in the production of inorganic bromides, alkyl bromides from alcohols, in cleaving acyclic and cyclic ethers, in adding to the cyclopropane group by ring opening, and as an alkylation catalyst.

Industrial uses: Chemical reaction regulator, Plating agent, Solvent, Intermediate, Processing aids, specific to petroleum production, Etching agent, Catalyst, Ion exchange agent.

Cosmetic ingredient, INCI name HYDROBROMIC ACID(buffering)

Roles

  • animal metabolite
  • eukaryotic metabolite
  • food component
  • mammalian metabolite
  • metabolite
  • micronutrient
  • mouse metabolite
  • nutrient
  • physiological role

Functional uses

  • pH regulating agent

Cosmetic functions

  • Buffering

How it is made

Hydrogen bromide is prepared commercially by the direct gas-phase reaction of hydrogen and bromine ... The reaction can be conducted without catalyst by maintaining a self-sustaining flame within an enclosed burner. (Hydrogen bromide gas)

(1) By passing hydrogen with bromine vapor over warm platinum sponge which acts as a catalyst, (2) As a by-product in the bromination of organic compounds. (Hydrogen bromide gas)

By dissolving hydrogen bromide in water or by distilling from a mixture of sodium bromide and 50% sulfuric acid. (Hydrobromic acid)

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 035-002-00-0

Health and food

  • EU cosmetic ingredient inventory
  • Active ingredient in FDA approved drug labels

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Hydrogen bromide is traded under.

HS 2811.19Indicative HS code

Inorganic acids, other than hydrogen fluoride

World exports in 2024
$494M
+6.5% vs 2023, imports $458M
2019 to 2024
Top exporters
  1. China24.9%
  2. Israel16.0%
  3. Jordan * partner reported11.7%
Top importers
  1. China29.3%
  2. United States16.2%
  3. Germany7.0%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Hydrogen bromide is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Hydrogen bromide, based on the data on this page

What is Hydrogen bromide?

Bromine atom is a halogen. It has a role as a micronutrient.

What is the CAS number of Hydrogen bromide?

The CAS registry number of Hydrogen bromide is 10035-10-6.

What is the molecular formula and weight of Hydrogen bromide?

The molecular formula of Hydrogen bromide is HBr and its molar mass is 80.91 g/mol.

What is Hydrogen bromide used for?

Pharmaceutical intermediate. (Hydrogen bromide gas). Isomerization of conjugated diolefins. (Hydrobromic acid). Analytical chemistry, solvent for ore minerals. (Hydrobromic acid).

Is Hydrogen bromide hazardous?

Hydrogen bromide carries the GHS signal word "Danger". Main hazards: causes severe skin burns and eye damage, may cause respiratory irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Hydrogen bromide?

Hydrogen bromide is usually classified under HS code 281119 (II. INORGANIC ACIDS AND INORGANIC OXYGEN COMPOUNDS OF NON-METALS, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Hydrogen bromide?

CompoundList lists 152 suppliers of Hydrogen bromide in India, China, United States, Germany and 19 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Hydrogen bromide in India?

57 suppliers in India list Hydrogen bromide on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Hydrogen bromide?

Suppliers quote Hydrogen bromide on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Hydrogen bromide

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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