Barium

Formula
Ba
Structure
Description
A silver to white metallic solid. Odorless.
Uses
Carrier for radium, alloys of barium with aluminum or magnesium are used as getters in electronic tubes, emissions from (140)ba contribute to fission products of uranium rods.

Registry Numbers and Inventories.
CAS
7440-39-3
EC (EINECS/ELINCS)
231-149-1
RTECS
CQ8370000
RTECS class
Other
UN (DOT)
1400
Merck
12,991
Beilstein/Gmelin
16266 (G)
RCRA
D005
Swiss Giftliste 1
G-6862
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Korea ECL
Listed

Properties.
Formula
Ba
Formula mass
137.33
Melting point, °C
725
Boiling point, °C
1640
Vapor pressure, mmHg
0.0002 (1000 C)
Density
3.51 g/cm3 (20 C)
Solubility in water
Insoluble
Surface tension
224 g/s2 720 C
Thermal expansion
1.814E-5/K (0 C)
Heat of fusion
3.5 kJ/mol
Heat of vaporization
185.6 kJ/mol

Hazards and Protection.
Storage
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep away from water. Store under an inert atmosphere.
Handling
Wash thoroughly after handling. Do not allow water to get into the container because of violent reaction. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation. Use with adequate ventilation. Handle under an inert atmosphere. Do not allow contact with water. Wash clothing before reuse. Keep from contact with moist air and steam.
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 to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks
Vacuum or sweep up material and place into a suitable disposal container. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Provide ventilation. Do not expose spill to water.
Stability
Stable at room temperature in closed containers under normal storage and handling conditions. Powder or liquid is pyrophoric. Combines vigorously or explosively with water.
Incompatibilities
Acids, ammonia, halogenated organics (e.g. dibromoethane, hexachlorobenzene, methyl chloride, trichloroethylene), water.
Decomposition
Irritating and toxic fumes and gases, hydrogen gas.

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. Water Reactive. Material will react with water and may release a flammable and/or toxic gas. May ignite or explode on contact with steam or moist air. Material gives a green color when in contact with flames. Extinguishing media: Use dry sand or earth to smother fire. DO NOT USE WATER! Contact professional fire-fighters immediately. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Fire potential
Flammable/combustible material.
Hazards
May ignite on contact with moist air or moisture. May burn rapidly with flare-burning effect. Some react vigorously or explosively on contact with water. Some may decompose explosively when heated or involved in a fire. May re-ignite after fire is extinguished. Runoff may create fire or explosion hazard.
Combustion products
Fire will produce irritating, corrosive and/or toxic gases.
Health
2
 
Flammability
1
 
 
Reactivity
2
 
 
Special
W

Health.
Exposure limit(s)
TLV: ppm; 0.5 mg/m3 (as TWA) (ACGIH 1992-1993).
Poison_Class
2
Exposure effects
Effects may be delayed.
   Ingestion
May cause gastrointestinal irritation with nausea, vomiting and diarrhea. May cause cardiopulmonary system effects.
   Inhalation
Causes respiratory tract irritation. Can produce delayed pulmonary edema.
   Skin
Causes skin irritation. Contact with skin causes irritation and possible burns, especially if the skin is wet or moist.
   Eyes
Causes eye irritation. When substances becomes wet or comes in contact with moisture of the mucous membranes, it becomes an irritant. May cause chemical conjunctivitis.

First aid
 
   Ingestion
Never give anything by mouth to an unconscious person. Get medical aid. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid. DO NOT use mouth-to-mouth respiration.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. If water-reactive products are embedded in the skin, no water should be applied. The embedded products should be covered with a light oil.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
UN number
1400
Response guide
Hazard class
4.3
Packing Group
II
 
USCG CHRIS Code
BRM
 
Std. Transport #
4916120