International Chemical Safety Cards

HAFNIUM POWDER ICSC: 0847
World Health Organization (WHO) International Labour Organization (ILO) United Nations Environmental Programme (UNEP) European Commission National Institute for Occupational Safety and Health (NIOSH)
Hf
Atomic mass: 178.5
(powder)
4 Spontaneously Combustible placard ICSC #    0847
CAS #     7440-58-6
RTECS # MG4600000
UN #        2545
May 05, 2010 Validated
TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/
FIRE FIGHTING
FIRE Flammable. See Chemical dangers.
NO open flames, NO sparks, and NO smoking.
Special powder. Dry sand. Water in large amounts.
EXPLOSION Finely dispersed particles form explosive mixtures in air. Risk of fire and explosion (see Chemical Dangers).
Do NOT expose to friction or shock. Prevent deposition of dust; closed system, dust explosion-proof electrical equipment and lighting.

EXPOSURE
STRICT HYGIENE!

 •INHALATION
Avoid inhalation of dust. Closed system.
Fresh air, rest.
 •SKIN
Protective gloves.
Rinse contaminated clothes (fire hazard) with plenty of water. Remove contaminated clothes. Rinse and then wash skin with water and soap.
 •EYES Redness.
Safety spectacles.
Rinse with plenty of water (remove contact lenses if easily possible).
 •INGESTION
Do not eat, drink, or smoke during work. Wash hands before eating.
Rinse mouth.
SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING
Evacuate danger area! Consult an expert! Remove all ignition sources. Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Do NOT wash away into sewer. Do NOT absorb in saw-dust or other combustible absorbents. Sweep spilled substance into water filled, sealable containers. Carefully collect remainder, then remove to safe place.
Fireproof. Separated from strong oxidants, strong acids, halogens . Keep under inert gas. Store in original container.

UN Hazard Class: 4.2
UN Packing Group: I
Signal: Danger
Flame
Catches fire spontaneously if exposed to air
SEE IMPORTANT INFORMATION ON BACK
ICSC: 0847 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

International Chemical Safety Cards

HAFNIUM POWDER ICSC: 0847
I

M

P

O

R

T

A

N

T


D

A

T

A
PHYSICAL STATE; APPEARANCE:
GREY POWDER.

PHYSICAL DANGERS:
Dust explosion possible if in powder or granular form, mixed with air.

CHEMICAL DANGERS:
The substance may spontaneously ignite on contact with air. May explosively decompose on shock, friction, or concussion. May explode on heating. Reacts violently with halogens, strong acids and strong oxidants causing explosion hazard.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 0.5 mg/m as TWA (ACGIH 2010).
MAK: IIb (not established but data is available) (DFG 2009).
OSHA PEL*: TWA 0.5 mg/m3 *Note: The PEL also applies to other hafnium compounds (as Hf).
NIOSH REL*: TWA 0.5 mg/m3 *Note: The REL also applies to other hafnium compounds (as Hf).
NIOSH IDLH: 50 mg/m3 (as Hf) See: 7440586


ROUTES OF EXPOSURE:


INHALATION RISK:


EFFECTS OF SHORT-TERM EXPOSURE:


EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
PHYSICAL
PROPERTIES
Boiling point: 4602C
Melting point: 2227C
Relative density (water = 1): 13.31
Solubility in water: none
Auto-ignition temperature: 20C
ENVIRONMENTAL
DATA

N O T E S
Insufficient data are available on the effect of this substance on human health, therefore utmost care must be taken. Powder is normally handled wetted with no less than 25% of water to reduce the fire and explosion risk. UN number 2545 is for dry powder, according to the specification of the powder Packing Group can be either I, II, or III. The GHS classification will also vary according to the specification of the powder. Other UN number is: 1326 HAFNIUM POWDER, WETTED with not less than 25% water; class 4.1; packing group: II.
ADDITIONAL INFORMATION


ICSC: 0847 HAFNIUM POWDER
(C) IPCS, CEC, 1994
IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.