ICSC 0778 - BARIUM OXIDE

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BARIUM OXIDE	ICSC: 0778 (October 1999)
Barium monoxide Barium protoxide Calcined baryta

CAS #: 1304-28-5

UN #: 1884

EC Number: 215-127-9

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Not combustible.		In case of fire in the surroundings, use appropriate extinguishing media.

PREVENT DISPERSION OF DUST! STRICT HYGIENE!
	SYMPTOMS	PREVENTION	FIRST AID
Inhalation	Cough. Sore throat.	Use local exhaust or breathing protection.	Fresh air, rest. Refer for medical attention.
Skin	Redness. Pain.	Protective gloves.	Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention .
Eyes	Redness. Pain.	Wear safety spectacles or eye protection in combination with breathing protection if powder.	First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.
Ingestion	Abdominal pain. Diarrhoea. Nausea. Vomiting. Muscle paralysis. Irregular heartbeat. Elevated blood pressure.	Do not eat, drink, or smoke during work.	Rinse mouth. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Give one or two glasses of water to drink. Refer for medical attention .

SPILLAGE DISPOSAL	CLASSIFICATION & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Sweep spilled substance into covered containers. Carefully collect remainder. Then store and dispose of according to local regulations.	According to UN GHS Criteria Transportation UN Classification UN Hazard Class: 6.1; UN Pack Group: III
STORAGE
Separated from food and feedstuffs. Dry. Well closed.
PACKAGING
Airtight. Do not transport with food and feedstuffs.

BARIUM OXIDE

ICSC: 0778

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance YELLOWISH-WHITE SOLID IN VARIOUS FORMS. Physical dangers Chemical dangers The solution in water is a medium strong base. Reacts violently with water, dinitrogen tetraoxide, hydroxylamine, sulfur trioxide and hydrogen sulfide. This generates fire and explosion hazard.	Formula: BaO Molecular mass: 153.3 Boiling point: ~2000°C Melting point: 1923°C Density: 5.7 g/cm³ Solubility in water, g/100ml at 20°C: 3.8

PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
YELLOWISH-WHITE SOLID IN VARIOUS FORMS.

Physical dangers

Chemical dangers
The solution in water is a medium strong base. Reacts violently with water, dinitrogen tetraoxide, hydroxylamine, sulfur trioxide and hydrogen sulfide. This generates fire and explosion hazard.

Formula: BaO
Molecular mass: 153.3
Boiling point: ~2000°C
Melting point: 1923°C
Density: 5.7 g/cm³
Solubility in water, g/100ml at 20°C: 3.8

EXPOSURE & HEALTH EFFECTS
Routes of exposure The substance can be absorbed into the body by inhalation of its aerosol and by ingestion. Effects of short-term exposure The substance is irritating to the eyes, skin and respiratory tract. The substance may cause effects on the nervous system. Exposure could cause hypokalaemia. This may result in cardiac disorders and muscular disorders. Exposure could cause death.	Inhalation risk Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed. Effects of long-term or repeated exposure

EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by inhalation of its aerosol and by ingestion.

Effects of short-term exposure
The substance is irritating to the eyes, skin and respiratory tract. The substance may cause effects on the nervous system. Exposure could cause hypokalaemia. This may result in cardiac disorders and muscular disorders. Exposure could cause death.

Inhalation risk
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed.

Effects of long-term or repeated exposure

OCCUPATIONAL EXPOSURE LIMITS
TLV: 0.5 mg/m³, as TWA; A4 (not classifiable as a human carcinogen). MAK: (as Ba): (inhalable fraction): 0.5 mg/m³; peak limitation category: II(8); pregnancy risk group: D. EU-OEL: (as Ba): 0.5 mg/m³ as TWA

ENVIRONMENT
The substance is harmful to aquatic organisms.

NOTES
Reacts violently with fire extinguishing agents such as water. Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available. NEVER pour water into this substance; when dissolving or diluting always add it slowly to the water.

ADDITIONAL INFORMATION

EC Classification
Symbol: Xn; R: 20/22; S: (2)-28; Note: A

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