Agent Name

Barium oxide

CAS Number

1304-28-5

Formula

Ba-O

Major Category

Metals

Synonyms

Barium monoxide; Barium protoxide; Baryta; Calcined baryta; Oxyde de baryum [French]; [ChemIDplus] UN1884

Category

Metals, Inorganic Compounds

Description

White to yellowish-white solid; Soluble in water; [Merck Index] Beige powder; [Aldrich MSDS]

Sources/Uses

Used to dry gases and solvents and to make lubricating oil detergents and barium methoxide; [Merck Index] Used as a drying agent for gasoline and solvents; [CAMEO]

Comments

Highly alkaline; Absorbs moisture and carbon dioxide from air; Produces barium hydroxide and much heat on contact with water; [Merck Index] Reacts violently with water posing fire and explosion hazard; A skin, eye, and respiratory tract irritant; Short-term exposure may affect the nervous system and cause hypokalemia (leading to cardiovascular and muscular disorders); [ICSC] Reacts with water evolving energy and forming barium hydroxide (corrosive); A skin, eye, and respiratory tract irritant; [CAMEO] Causes somnolence and tetany in intraperitoneal lethal-dose studies of mice; [RTECS] Causes burns; Inhalation may cause corrosive injuries to upper respiratory tract and lungs; Toxic by ingestion; Targets heart, nerves, kidney, GI tract, bone marrow, spleen, and liver; [Aldrich MSDS] See "Barium."

Exposure Assessment
TLV (ACGIH)

0.5 mg/m3, as Ba

PEL (OSHA)

0.5 mg/m3, as Ba

MAK

0.5 mg/m3, as Ba, inhalable fraction(soluble compds)

IDLH (NIOSH)

50 mg/m3, as Ba

Adverse Effects
Nephrotoxin

Yes

Dermatotoxin

Skin Burns

ACGIH Carcinogen

Not Classifiable

Links to Other NLM Databases
Toxicity Information

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Chemical Information

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Related Information in HazMap
Processes

Industrial Processes with risk of exposure: