Barium peroxide

  • Barium dioxide
  • Barium superoxide
Formula
BaO2
Structure
Description
A grayish-white granular solid.
Uses
Bleaching animal substances, vegetable fibers and straw, glass decolorizer, manufacture of hydrogen peroxide and oxygen, in cathodes, dyeing and printing textiles, in powder aluminum in welding, in igniter compositions, oxidizing agent in organic synth.

Registry Numbers and Inventories.
CAS
1304-29-6
EC (EINECS/ELINCS)
215-128-4
EC Index Number
056-001-00-1
EC Class
Oxidising; Harmful
RTECS
CR0175000
RTECS class
Other
UN (DOT)
1449
Merck
12,1018
Beilstein/Gmelin
7773 (G)
RCRA
D005
Swiss Giftliste 1
G-7807
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
BaO2
Formula mass
169.32
Melting point, °C
450
Decomposition point, °C
700
Odor Threshold Odor threshold Odorless
Density
4.96 g/cm3 (20 C)
Solubility in water
Slightly soluble

Hazards and Protection.
Storage
Do not store near combustible materials. Store in a cool, dry, well-ventilated area away from incompatible substances.
Handling
Wash thoroughly after handling. Wash hands before eating. Use with adequate ventilation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid contact with clothing and other combustible materials. 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 gloves 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
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. Remove all sources of ignition.
Stability
Unstable.
Incompatibilities
Corrodes metal. Explodes on contact with acetic anhydride producing acetyl peroxide, reacts violently with propane when heated, ignites when mixed with calcium-silicone alloys, powdered aluminum, powdered magnesium, and water + organic compounds, and ignites wood with the friction it creates. Incompatible with hydrogen sulfide, water, peroxyformic acid, hydroxylamine solution, organic matter and a mixture of manganese, zinc, and barium nitrate.
Decomposition
Barium oxide, oxygen.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Strong oxidizer. Contact with combustible materials may cause a fire. Extinguishing media: Use water spray to cool fire-exposed containers. Use water only!
Fire potential
This material itself is non-combustible.
Hazards
Can increase intensity of fire.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
2
 
Flammability
0
 
 
Reactivity
1
 
 
Special
O

Health.
Exposure limit(s)
TLV (Barium and soluble compounds, as Ba): 0.5 mg/m3 A4 (TWA) (ACGIH 1996).
Poison_Class
2
Exposure effects
Abnormally low blood pressure and apnea have been reported with severe poisonings. Cerebral edema, cerebral gas embolism, cerebral infarction, and seizures have been reported following ingestion of concentrated (35%) solutions. Death has been reported as a result of embolic cerebrovascular injury.
   Ingestion
Causes gastrointestinal irritation with nausea, vomiting and diarrhea. May cause respiratory failure. May cause circulatory system failure. May cause hemorrhaging of the digestive tract. Causes potassium deficiency and may affect the function of the heart and central nervous system. Symptoms may include salivation, vomiting, severe abdominal pain, violent purging, cardiac rhythm changes, dilated pupils, confusion, dizziness, muscle tremors, convulsions, paralysis, and death.
   Inhalation
Benign pneumonconsis from chronic inhalation. Irritation of the nose and throat. Excessive salivation, vomiting, violent diarrhea, tremors, muscular paralysis and CNS paralysis.
   Skin
Corrosive.
   Eyes
Causes eye irritation.

First aid
 
   Ingestion
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 immediately.
   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.

Transport.
UN number
1449
Response guide
Hazard class
5.1
Packing Group
II
 
USCG CHRIS Code
BPO
 
Std. Transport #
4918712