Hydrobromic Acid (HBr), Physical Properties, Specifications

Hydrobromic Acid (HBr)

HBr

Chemical Name: Hydrobromic Acid 48% / 52%/ 62%

Formula: HBr

CAS Number: 10035-10-6

HBr content: (%): 48-49

Molecular Weight: 80.9 g/mol

General info and Field of Use:
Hydrobromic Acid (HBr) is used as a source of Bromine in industrial syntheses.

It is a strong acid in aqueous solution, used for the preparation of catalyst in PTA/PET production, an electrolyte for energy storage, and as a hydrobromination agent in a broad range of organic processes (for Pharma and Agro applications).

Physical Properties of hydrobromic acid

Note: Physical properties are presented for hydrobromic acid 48% solution, as a

representative product. Values for other products can be found on the relevant MSDS.

  • Boiling Point 126ºC**
  • Melting Point (48%) -63ºC
  • Critical Temperature* 89.8ºC
  • Critical Pressure* 84 atm.
  • Flash Point* None
  • Auto Ignition Temperature* Not applicable
  • Decomposition Temperature* Not available
  • Molecular Weight* 80.9
  • Liquid Density 1.4882 g/ml at 20ºC
  • Vapor Density at 760 mm Hg and 25ºC (Air = 1)* 2.71
  • Latent Heat of Evaporation* 51.3 cal/g
  • Latent Heat of Fusion* 7.1 cal/g
  • Flammable Limits in Air* Not flammable
  • Solubility in Water* 194 g/100 ml at 20ºC
  • Refers to 100% Hydrogen Bromide ** As constant boiling mixture 47.63%

Typical Properties:

AppearanceClear, colorless to yellow liquid, slowly darkening on exposure to air and light.
OdorPungent
Melting point/rangeca. -63°C
Boiling point/range126 °C (47.63%)
Evaporation rate (ether=1)Not available
Vapor pressure8 mmHg (25°C)
Vapor density1.7
Solubility: Solubility in waterFor HBr 100%:221 gr/100ml at 0°C194 g/100ml at 20°C130 gr/100ml at 100°C
Solubility in other solventsSoluble in organic solvents and acetic acid
Partition coefficient(n-octanol/water)Log Kow : 0.63-1.03 (25°C) (HBr 100%)
Explosive propertiesNot explosive
Oxidizing propertiesNot oxidizing

Specifications: Hydrobromic Acid (HBr)

HBr 48%

HBr Content %Min – 48 Max – 49
Density 20/20 C° g/mlMin 1.488
Free Bromine (Br2) ppmMax 10
Chlorides (as Cl-) ppmMax 100

HBr 52%

HBr Content %Min 52 Max 53
Density 20/20 C° g/mlMin 1.53
Color APHAMax 50
Free Bromine (Br2) ppmMax 10
Chlorides (as Cl-) ppmMax 100

HBr 62%

HBr Content %Min 62
Density 20/20 C° g/mlMin 1.705
Free Bromine (Br2) ppmMax 50
Chlorides (as Cl-) ppmMax 100

Packaging:
Hydrobromic acid is supplied in the following packaging:

  • Drums
  • Intermediate Bulk Containers – IBCs
  • Bulk Truck Loads

Flammability and Exclusivity:
Hydrobromic acid is non-flammable and non-explosive. At high temperatures, it will release toxic fumes of hydrogen bromide.

Toxicity
LD50 (inhalation rate): HBr 100% 2,858 ppm/1h. Hydrobromic acid is corrosive to the eyes, skin, and mucous membranes. Actual inhalation may produce delayed pulmonary edema. Direct contact results in serious corneal and skin burns.

Storage & Handling:
Keep containers tightly closed and protected from physical damage. Use fluorinated vinyl chloride resins or polyethylene glass-coated equipment. Avoid breathing vapors and any other bodily contact.

Some full form

  • AAR -American Association of Railroads
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  • ACEP -Approved Continuous Examination Program (CSC)
  • ACGIH– American Conference of Governmental Industrial Hygienists
  • ACOP– Approved Code of Practice (UK)
  • ADR European Agreement concerning the International Carriage of
  • Dangerous Goods by Road
  • ANSI American National Standards Institute
  • C Ceiling Limit Value (For TLV)
  • CAF Compressed Asbestos Fiber
  • CAS Chemical Abstract Service
  • CEFIC European Chemical Industry Council
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  • Act (US)
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  • CGA Compressed Gas Association (US)
  • CHEMTREC Chemical Transportation Emergency Center (US)
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  • CPL Classification, Packaging and Labelling of Dangerous Substances
  • Regulations (UK)
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  • CWA Clean Water Act (US)
  • DOT Dept of Transportation (US)
  • EAC Emergency Action Code
  • EMSno. Emergency Schedule Number (IMO)
  • EPA Environmental Protection Agency (US)
  • FM Factory Mutual System (US)
  • HAP Hazardous Air Pollutant
  • HBr Hydrobromic acid
  • HDPE High Density Polyethylene
  • HSE Health and Safety Executive (UK)
  • IARC International Agency for Research on Cancer
  • IATA International Air Transport Association
  • ICL-IP ICL Industrial Products
  • IDLH Immediately Dangerous to Life or Health
  • IMDG International Maritime Dangerous Goods code
  • HBr SAFETY HANDBOOK 9
  • IMO International Maritime Organization
  • IPIC Israel Poisons Information Center
  • ISO International Standards Organization
  • MAK Maximum Concentration at the Workplace (Germany)
  • MEL Maximum Exposure Limit (UK)
  • MFAG Medical First Aid Guide (IMO)
  • MSDS Material Safety Data Sheet
  • NA North America (US)
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  • NFPA National Fire Protection Association (US)
  • NIHHS Notification of Installation Handling Hazardous Substances
  • Regulations (UK)
  • NIOSH National Institute of Occupational Safety & Health (US)
  • NOS Not Otherwise Specified
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  • OSHA Occupational Safety and Health Administration (US)
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  • STEL Short-term Exposure Limit
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  • TSCA Toxic Substances Control Act (US)
  • TWA Time Weighted Average
  • UIC International Union of Railways (Europe)
  • UL Underwriters Laboratories (US)
  • UN United Nations

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Hydrobromic Acid (HBr), Physical Properties, Specifications 1

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