ICSC 1234 - NITROGEN TRIFLUORIDE

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NITROGEN TRIFLUORIDE	ICSC: 1234 (October 2004)
Nitrogen fluoride Trifluoroamine Trifluoroammonia Perfluoroammonia

CAS #: 7783-54-2

UN #: 2451

EC Number: 232-007-1

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Not combustible but enhances combustion of other substances. Gives off irritating or toxic fumes (or gases) in a fire. Heating will cause rise in pressure with risk of bursting.	NO contact with flammables. NO contact with reducing agents.	In case of fire in the surroundings, use appropriate extinguishing media. In case of fire: keep cylinder cool by spraying with water.


	SYMPTOMS	PREVENTION	FIRST AID
Inhalation		Use ventilation, local exhaust or breathing protection.	Fresh air, rest.
Skin			Remove contaminated clothes.
Eyes		Wear safety goggles.	First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.
Ingestion

SPILLAGE DISPOSAL	CLASSIFICATION & LABELLING
Ventilation. NEVER direct water jet on liquid. Personal protection: self-contained breathing apparatus.	According to UN GHS Criteria Transportation UN Classification UN Hazard Class: 2.2; UN Subsidiary Risks: 5.1
STORAGE
Fireproof if in building. Separated from combustible substances and reducing agents. Cool.
PACKAGING

NITROGEN TRIFLUORIDE

ICSC: 1234

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance COLOURLESS GAS WITH CHARACTERISTIC ODOUR. Physical dangers The gas is heavier than air and may accumulate in lowered spaces causing a deficiency of oxygen. Chemical dangers Decomposes on heating. This produces toxic fumes including fluoride. The substance is a strong oxidant. It reacts with combustible and reducing materials. Reacts violently with ammonia, carbon monoxide, diborane, hydrogen, hydrogen sulfide, methane and tetrafluorohydrazine. This generates explosion hazard. Attacks metals. The substance is decomposed by electric sparks.	Formula: NF₃ Molecular mass: 71.0 Boiling point: -129°C Melting point: -208.5°C Relative density (water = 1): see Notes Solubility in water: none Relative density of the vapour/air-mixture at 20°C (air = 1): 2.45

PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS GAS WITH CHARACTERISTIC ODOUR.

Physical dangers
The gas is heavier than air and may accumulate in lowered spaces causing a deficiency of oxygen.

Chemical dangers
Decomposes on heating. This produces toxic fumes including fluoride. The substance is a strong oxidant. It reacts with combustible and reducing materials. Reacts violently with ammonia, carbon monoxide, diborane, hydrogen, hydrogen sulfide, methane and tetrafluorohydrazine. This generates explosion hazard. Attacks metals. The substance is decomposed by electric sparks.

Formula: NF₃
Molecular mass: 71.0
Boiling point: -129°C
Melting point: -208.5°C
Relative density (water = 1): see Notes
Solubility in water: none
Relative density of the vapour/air-mixture at 20°C (air = 1): 2.45

EXPOSURE & HEALTH EFFECTS
Routes of exposure The substance can be absorbed into the body by inhalation. Effects of short-term exposure	Inhalation risk A harmful concentration of this gas in the air will be reached very quickly on loss of containment. Effects of long-term or repeated exposure The substance may have effects on the liver and kidneys. Repeated or prolonged inhalation may cause fluorosis.

EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by inhalation.

Effects of short-term exposure

Inhalation risk
A harmful concentration of this gas in the air will be reached very quickly on loss of containment.

Effects of long-term or repeated exposure
The substance may have effects on the liver and kidneys. Repeated or prolonged inhalation may cause fluorosis.

OCCUPATIONAL EXPOSURE LIMITS
TLV: 10 ppm as TWA; BEI issued

ENVIRONMENT

NOTES
Density of the liquid at boiling point: 1.885 kg/l. The odour warning when the exposure limit value is exceeded is insufficient. Methemoglobinemia has been observed in animals, but relevance to humans is unclear. Turn leaking cylinder with the leak up to prevent escape of gas in liquid state. Wear protective equipment during this operation. Check oxygen content before entering area. High concentrations in the air cause a deficiency of oxygen with the risk of unconsciousness or death.

NOTES

Density of the liquid at boiling point: 1.885 kg/l.
The odour warning when the exposure limit value is exceeded is insufficient.
Methemoglobinemia has been observed in animals, but relevance to humans is unclear.
Turn leaking cylinder with the leak up to prevent escape of gas in liquid state.
Wear protective equipment during this operation.
Check oxygen content before entering area.
High concentrations in the air cause a deficiency of oxygen with the risk of unconsciousness or death.

ADDITIONAL INFORMATION

EC Classification

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