Mercuric bromide

  • Mercury(II) bromide
  • Mercury dibromide
Formula
HgBr2
Structure
Description
White rhombic crystals.
Uses
In prepn of medicines.

Registry Numbers and Inventories.
CAS
7789-47-1
EC (EINECS/ELINCS)
232-169-3
R 26/27/28 33 50/53
S 13 28 45 60 61
RTECS
OV7415000
RTECS class
Other
UN (DOT)
1634
Merck
13,5900
Beilstein/Gmelin
9284 (G)
RCRA
D009
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Korea ECL
Listed

Properties.
Formula
Br2Hg
Formula mass
360.39
Melting point, °C
236
Boiling point, °C
320
Vapor pressure, mmHg
0.0012
Vapor density (air=1)
12
Density
6.1 g/cm3
Solubility in water
Slightly soluble
Dipole moment
1.53 D
Dielectric constant
9.84
Heat of fusion
16.4 kJ/mol
Heat of vaporization
59.4 kJ/mol

Hazards and Protection.
Storage
Do not store in direct sunlight. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Do not store in metal containers.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Minimize dust generation and accumulation. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Do not ingest or inhale. Store protected from light.
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 gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
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. Avoid generating dusty conditions. Provide ventilation.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents, sodium, potassium, light.
Decomposition
Hydrogen bromide, mercury/mercury oxides.

Fire.
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. Use water spray to keep fire-exposed containers cool. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated. Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Extinguishing media: Do NOT get water inside containers. For small fires, use dry chemical, carbon dioxide, or water spray. For large fires, use dry chemical, carbon dioxide, alcohol-resistant foam, or water spray. Cool containers with flooding quantities of water until well after fire is out.
Fire potential
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Hazards
Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated.
Combustion products
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Health
3
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure limit(s)
NIOSH REL: C 0.1 mg/m3 [skin] OSHA PEL: C 0.1 mg/m3 10 mg/m3 (as Hg)
Exposure effects
Chronic inhalation and ingestion may cause effects similar to those of acute inhalation and ingestion. Chronic ingestion may cause bromism characterized by disturbances of the central nervous system, skin and digestive tract.
   Ingestion
May be fatal if swallowed. Poison by ingestion. May cause kidney damage. May cause severe digestive tract irritation with abdominal pain, nausea, vomiting and diarrhea. Can cause nervous system damage.
   Inhalation
May cause severe irritation of the respiratory tract with sore throat, coughing, shortness of breath and delayed lung edema. May cause effects similar to those described for ingestion. Inhalation of bromides may cause irritation of the upper respiratory tract and lung tissue.
   Skin
May cause severe skin irritation. May be fatal if absorbed through the skin. Exposure to bromides may cause rashes, especially of the face (resembling acne) and boils.
   Eyes
Contact may cause severe eye irritation and possible eye damage.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid immediately. Induce vomiting by giving one teaspoon of Syrup of Ipecac.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.
   Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed.

Transport.
UN number
1634
Response guide
Hazard class
6.1
Packing Group
II
 
Std. Transport #
4923244