ICSC 1405 - ZIRCONIUM

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ZIRCONIUM	ICSC: 1405 (October 2004)
(unstable powder)

CAS #: 7440-67-7

UN #: 2008

EC Number: 231-176-9

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Combustible. Many reactions may cause fire or explosion. Finely dispersed particles form explosive mixtures in air.	NO open flames. Closed system, dust explosion-proof electrical equipment and lighting. Prevent deposition of dust.	Use dry sand, dry powder.

See EFFECTS OF LONG-TERM OR REPEATED EXPOSURE. PREVENT DISPERSION OF DUST!
	SYMPTOMS	PREVENTION	FIRST AID
Inhalation		Use local exhaust or breathing protection.	Fresh air, rest.
Skin		Protective gloves.	Remove contaminated clothes. Rinse and then wash skin with water and soap.
Eyes	Redness. Pain.	Wear safety goggles.	First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.
Ingestion		Do not eat, drink, or smoke during work.	Rinse mouth.

SPILLAGE DISPOSAL	CLASSIFICATION & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting. Carefully collect remainder. Then store and dispose of according to local regulations.	According to UN GHS Criteria Transportation UN Classification UN Hazard Class: 4.2; UN Pack Group: I
STORAGE
See Chemical Dangers.
PACKAGING

ZIRCONIUM

ICSC: 1405

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance HARD LUSTROUS GREYISH-WHITE FLAKES OR GREY AMORPHOUS POWDER. Physical dangers Dust explosion possible if in powder or granular form, mixed with air. Chemical dangers Reacts violently with borax and carbon tetrachloride when heated. Reacts explosively with alkali metal hydroxides when heated.	Formula: Zr Atomic mass: 91.2 Boiling point: 3577°C Melting point: 1857°C Relative density (water = 1): 6.5 Solubility in water: none

PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
HARD LUSTROUS GREYISH-WHITE FLAKES OR GREY AMORPHOUS POWDER.

Physical dangers
Dust explosion possible if in powder or granular form, mixed with air.

Chemical dangers
Reacts violently with borax and carbon tetrachloride when heated. Reacts explosively with alkali metal hydroxides when heated.

Formula: Zr
Atomic mass: 91.2
Boiling point: 3577°C
Melting point: 1857°C
Relative density (water = 1): 6.5
Solubility in water: none

EXPOSURE & HEALTH EFFECTS
Routes of exposure Effects of short-term exposure May cause mechanical irritation to the eyes.	Inhalation risk A harmful concentration of airborne particles can be reached quickly when dispersed. Effects of long-term or repeated exposure Repeated or prolonged inhalation of dust particles may cause effects on the lungs.

EXPOSURE & HEALTH EFFECTS

Routes of exposure

Effects of short-term exposure
May cause mechanical irritation to the eyes.

Inhalation risk
A harmful concentration of airborne particles can be reached quickly when dispersed.

Effects of long-term or repeated exposure
Repeated or prolonged inhalation of dust particles may cause effects on the lungs.

OCCUPATIONAL EXPOSURE LIMITS
TLV: 5 mg/m³, as TWA; 10 mg/m³ as STEL; A4 (not classifiable as a human carcinogen). MAK not established but data are available

ENVIRONMENT

NOTES
Other UN numbers: 1358 Zirconium powder; wetted; hazard class 4.1, packaging group II; 1932 Zirconium scrap, hazard class 4.2, packaging group III; 2009 Zirconium, dry, finished metal sheets, wire, strip, hazard class 4.2, packaging group III; 2858 Zirconium, metal sheets, 18-254 microns, hazard class 4.1, packaging group III. Pure Zirconium sponge is pyrophoric and violently explosive when impure.

NOTES

Other UN numbers: 1358 Zirconium powder; wetted; hazard class 4.1, packaging group II; 1932 Zirconium scrap, hazard class 4.2, packaging group III; 2009 Zirconium, dry, finished metal sheets, wire, strip, hazard class 4.2, packaging group III; 2858 Zirconium, metal sheets, 18-254 microns, hazard class 4.1, packaging group III.
Pure Zirconium sponge is pyrophoric and violently explosive when impure.

ADDITIONAL INFORMATION

EC Classification
Symbol: F; R: 15-17; S: (2)-7/8-43

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