Hydrogen bromide

  • Hydrogen bromide, anhydrous
Formula
HBr
Structure
Description
A colorless to yellow aqueous liquid with a pungent odor.
Uses
In analytical chemistry & organic preparations.

Registry Numbers and Inventories.
CAS
10035-10-6
EC (EINECS/ELINCS)
233-113-0
EC Index Number
035-002-00-0
EC Class
Corrosive; Irritant
R 34 37
S 7/9 26 45
RTECS
MW3850000
RTECS class
Other
UN (DOT)
1048
Merck
13,4799
Beilstein/Gmelin
620 (G)
Swiss Giftliste 1
G-1308
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
BrH
Formula mass
80.91
Melting point, °C
-86
Boiling point, °C
-66.7
Vapor pressure, mmHg
20 (25 C)
Vapor density (air=1)
2.8
Odor Threshold Odor threshold 6.6667 mg/m3
Critical temperature
89.8
Critical pressure
84
Density
1.49 g/cm3
Solubility in water
Miscible
Viscosity
0.815 cp (-74 C)
Surface tension
27.1 g/s2
Refractive index
1.325 (10 C)
Heat of fusion
2.41 kJ/mol
Heat of vaporization
17.15 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry place. Keep container closed when not in use.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves and clothing to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Clean up spills immediately, using the appropriate protective equipment. Sweep up, then place into a suitable container for disposal.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidants.
Decomposition
Nitrogen oxides, carbon monoxide, irritating and toxic fumes and gases, carbon dioxide, nitrogen.

Fire.
Flash Point,°C
40
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam.
Fire potential
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Hazards
Pressurized container may explode and release toxic, irritating vapor.
Combustion products
If involved in a fire decomposes to produce irritants and toxic gases.
Health
3
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure limit(s)
NIOSH REL: C 3 ppm (10 mg/m3) OSHA PEL: TWA 3 ppm (10 mg/m3) IDLH 30 ppm
Poison_Class
2
Exposure effects
Fever may occur with chronic intoxication. Acute intoxication can result in CNS depression and coma. Bromides cross the placenta and may be detected in the milk of nursing mothers. Case reports suggest that prenatal exposure may cause growth retardation, craniofacial abnormalities and developmental delay.
   Ingestion
Ingestion of large amounts may cause gastrointestinal irritation. The toxicological properties of this substance have not been fully investigated.
   Inhalation
May cause respiratory tract irritation. The toxicological properties of this substance have not been fully investigated.
   Skin
May cause skin irritation.
   Eyes
May cause eye irritation.

First aid
 
   Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
1048
Response guide
Hazard class
2.3
PRTC
T
USCG CHRIS Code
HBR
 
Std. Transport #
4920502