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ZIRCONIUM ICSC: 1405
Date of Peer Review: October 2004

(unstable powder)
CAS # 7440-67-7 Zr
RTECS # ZH7070000 Atomic mass: 91.2
UN # 2008
EC Index # 040-001-00-3
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Combustible. Many reactions may cause fire or explosion.
NO open flames.
Dry sand, dry powder.
EXPLOSION Finely dispersed particles form explosive mixtures in air.
Prevent deposition of dust; closed system, dust explosion-proof electrical equipment and lighting.

EXPOSURE See EFFECTS OF LONG-TERM OR REPEATED EXPOSURE.
PREVENT DISPERSION OF DUST!

Inhalation
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.
Safety goggles.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion
Do not eat, drink, or smoke during work.
Rinse mouth.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place. Personal protection: P2 filter respirator for harmful particles.
EU Classification
Symbol: F
R: 15-17
S: (2-)-7/8-43
UN Classification
UN Hazard Class: 4.2
UN Pack Group: I
EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-42GS4-I+II+III
See Chemical Dangers.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 2005

SEE IMPORTANT INFORMATION ON BACK
ZIRCONIUM ICSC: 1405
IMPORTANT DATA
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, carbon tetrachloride when heated. Reacts explosively when heated with alkali metal hydroxides.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 5 mg/m as TWA; 10 mg/m as STEL; A4 (not classifiable as a human carcinogen); (ACGIH 2004).
MAK: (Inhalable fraction) 1 mg/m; sensitization of respiratory tract and skin (Sah); Peak limitation category: I(1); Pregnancy risk group: IIc; (DFG 2004).
INHALATION RISK:
A harmful concentration of airborne particles can be reached quickly when dispersed.

EFFECTS OF SHORT-TERM EXPOSURE:
May cause mechanical irritation to the eyes.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Lungs may be affected by repeated or prolonged exposure to dust particles.
PHYSICAL PROPERTIES
Boiling point: 3577C
Melting point: 1857C
Relative density (water = 1): 6.5
Solubility in water: none
ENVIRONMENTAL DATA

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


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
IPCS, CEC 2005
See Also:
        Zirconium (UK PID)