Substance profile
Hydrogen Bromide
Hydrogen Bromide is a colorless gas with a sharp, irritating odor.
01 · Identification
What Hydrogen Bromide is
Hydrogen Bromide is a colorless gas with a sharp, irritating odor. Its molecular formula is BrH and its molecular weight is 80.91 g/mol. It boils at -66.4 °C, melts at -86.8 °C, is very soluble in water.
Under the GHS it carries the signal word Danger. It is classed as corrosives.
02 · GHS classification
Hazards and label elements
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
03 · Physical and chemical properties
Hydrogen Bromide properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | -66.38 °C (-87.5 °F) | HSDB | |
| -66.67 °C (-88 °F) | NIOSH | ||
| -66.78 °C (-88.2 °F) | at 760 mmHg | CAMEO | |
| Melting point | -86.8 °C (-124.2 °F) | HSDB | |
| -86.67 °C (-124 °F) | NIOSH | ||
| Density | 0.0033 g/cm³ | HSDB | |
| 1.517 g/cm³ | HSDB | ||
| 1.8 g/cm³ | ICSC | ||
| Solubility | Very soluble in water | HSDB | |
| 49% | NIOSH | ||
| Vapor pressure | 15200 mmHg | NIOSH | |
| 18410 mmHg | at 25 °C | HSDB | |
| Lower explosive limit (LEL) | Nonflammable Gas | NIOSH | |
| Vapor density | 2.71 (air = 1) | HSDB | |
| 2.81 (air = 1) | CAMEO | ||
| 2.8 (air = 1) | ICSC | ||
| Odor threshold | The odor threshold is 26.6 ppm. | HSDB | |
| Odor threshold= 6.6667 mg/cu m. Irritating concentration= 10.00 mg/cu m. | HSDB | ||
| Odor Threshold Low: 2.0 [ppm] | Haz-Map | ||
| Critical temperature and pressure | 90.05 °C (194.1 °F) | HSDB | |
| Corrosivity | Corrosive | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Hydrogen Bromide
Storage conditions
Separated from incompatible materials. ... Cool. Dry. Ventilation along the floor.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
Incompatible materials: Strong oxidizing agents, Strong bases, Ammonia, Ozone, Halogens, Amines, Gives off hydrogen by reaction with metals.
Source: Hazardous Substances Data Bank (HSDB)
Planning storage for a mix of chemicals? Check Hydrogen Bromide in the storage compatibility matrix →