HP Gas

High-Purity Hydrogen Bromide (Hydrogen Bromide)

Properties and Classification

Appearance: Colorless gas Odor: Irritating
CAS Number: 10035-10-6 UN Number: 1048
Liquefied gas Toxic

* Refer to MSDS for detailed information on the properties and safety of the product.


Purity wt% Min. 99.999
H2+O2 wtppm Max. 2.0
Water wtppm Max. 2.0
CF4 wtppm Max. 1.0
CO wtppm Max. 1.0
CO2 wtppm Max. 2.0
Total heavy metals wtppm Max. 1.0
High-Purity Hydrogen Bromide (Hydrogen Bromide)


Item 10L cylinder 47L cylinder
Size Inside diameter 140mm 232mm
Height (to the neck portion) 850mm 1370mm
Height (with a protective cap) * 1000mm 1520mm
Valve nozzle height (center) * 885mm 1400mm
Loading weight 5kg, 10kg 50kg
Material Manganese steel (Clean-S-treated)

* Estimated values for when a standard valve is mounted on a standard cylinder. The accuracy of these values is not guaranteed.


Nozzle size Ø22 mm X 14 right-hand threads
Material SUS304 (Clean-S-treated)

Physical & Chemical Properties

Item Unit Data
Chemical formula HBr
Molecular weight 80.91
Boiling point °C -66.72
°F -89
Melting point °C -86.9
Liquid density (-66.7°C) kg/L 2.16
Gas density g/L 3.33
Specific gravity (air: 1) 2.8 (101.3kPa)
Critical temperature °C 89.8
Critical pressure MPa 8.51
kg/cm2 86.8
Flammability Not applicable
Not applicable Toxic
Latent heat of vaporization (0°C, 1013MPa) kJ/kg 215.5
Maximum permissible concentration (ACGIH, TLV-upper limit) ppm 3
Explosive limit (in air, 35°C, 101.3 kPa)

Temperature – Vapor Pressure Curve

High-Purity Hydrogen Bromide (Hydrogen Bromide)