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File Name: espi-metals_com---hafnium.asp
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MATERIAL SAFETY DATA SHEET


I PRODUCT IDENTIFICATION

Hafnium Group 4 M etal
Trade Name: Ch em ical Fam ily:
Crystal Bar Hafnium, Iodide Bar Hafnium Hf
Synonyms: Form ula:
7440-5 8-6
CAS#:


II HAZAR DOUS INGRED IENTS

Haz ardous C omp onents % O SH A /T W A OSHA/STEL
0.5 m g/m 3
97-99.8 N/A
Hafnium
5 m g/m 3 10 m g/m 3
0.05-3
Zirconium

HM IS Hazard Rating: Hea lth: 0 Flam mab ility: 0 Reactivity: 0


III PHYSICAL DATA

4600 oC N/A
Boiling Point 760 mm Hg: Vapor Density(Air=L):
2227 +20 oC
N/A
pH of Solutions: Freezing/Melting Point:
830 lb/ft 3 (solid) No nvo latile
Bulk Den sity: % Volatile by Volume:
0 @ 20 oC None
Vapor Pressure: Evap oration R ate:
N/A 13.3
Heat of Solutions: Specific Gravity (H 2O=L):
Sim ilar to Stainless stee l. Insoluble
Appearance and Odor: Solubility (Weight in H 2O):


IV FIRE AND EXPLOSION H AZARDS DATA

Flash Point: N/A
Explosive Lim its: Lower: N/A Upper: N/A

Fire Danger: Fine chips, turn ings, o r grin ding dust produced from this m etal a re flamm able.

Ignition Point: Solid hafnium will not ignite. 10 micron powder m ay autoignite at room temperature.

Extingu ishing Media: Typ e D Fire E xting uishe r. Dry table salt.
Fire Fighting Procedures: Isolate burning material. It is advisable to allow large fires to burn out, keeping the fire from spreading.
Wear reflective heat resistant suit. Small fires can be controlled by smo thering with dry salt or using Type D dry-pow der fire
extinguish ing m aterial.

Unusual Fire & Explosion Hazard: Do not spray water on burning fines, chips, powder or sponge as a violent explosion may
result. This hazard increases with finer particles. If a fire starts in a mass of wet metal fines, such as a barrel of damp machining
chips, the initial fire m ay be followed by an ex plosio n and a very h igh temp erature flash radiation. T herefore, when in dou bt,
personnel should retire and not attempt to extinguish the fire. The explosion characteristics of such material is caused by the
hydrogen and steam generated by the burning mass. Carbon dioxide is not effective in extinguishing burning hafnium.
V HEALTH HAZARD INFORMATION

Routes of Entry: Inhalation: No Ingestion: No Skin absorption: No Skin/Eye Contact: No

Target Organs: None known
Toxicity Da ta: Hafnium metal has no known toxicity. The metal is completely insoluble in water, saline solutions or body
chem icals. See com ments below for solub le hafnium com pounds.

Corrosive: No Carcinogen: No Sensitizer: No
Com ments: Soluble hafnium compounds have been reported to cause liver damage in lab tests on animals. The LD50 of hafnium,
chiefly as the oxych loride , was 76 m g/kg for m ice. A 90 d ay hafniu m c hloride feeding stud y in rats at 1.0% and 0.1% resulted in
unspecified liver effects. N o indu strial disease has bee n evide nt with up to 20 years exposed to hafniu m co mp ounds.

Acute Effects from Exp osure: None known
Chronic Effects from Exp osure: None known

References: NIOSH/OSHA - Occupational Health Guidelines for Chemical Hazards Casarett and Doull's Toxicology, 2nd Edition
OSHA 20CFR 1910 Table Z-1-A, Jan. 1989.

EMERG ENCY AND FIRST AID PROCEDURES:

EYE: Normal pro cedure fo r inert fo reign object.
SK IN: Normal pro cedure fo r cuts from sharp me tal.
INHALATION: N/A
INGESTION: N/A


VI REACTIVITY DATA

Stability: Stable
Incompatibility (Material to Avoid): Hafnium m etal is rapidly dissolve d by hydrofluoric ac id or hy drofluo ric-nitric acid m ixtures.
Above 200 oC, hafnium reacts exothermically with fluorine, chlorine, bromine, iodine and with halocarbons, including carbon
tetrachloride, carbon tetrafluoride and Freons. Nitryl fluoride, FNO 2, will initiate a reaction with hafnium m etal at room temperature
to pro duc e a glo wing or wh ite incande scence.

Haz ardous D ecomposition Produc ts: Hafnium me tal does no t deco mp ose. T he ab ove reactio ns w ith inco mp atible m aterials w ill
generate hazardou s reaction products such as flamm able hydrog en, toxic fumes of nitrogen ox ides or corrosive hafnium h alide vapors

Hazardous Polymerization: Will not Occur


VII SPILL OR LEAK PROC EDURES

Steps to be Taken in Case Material is Released or Spilled: No spe cial proced ures.
Waste Disposal Method: Fine non-recyclable scrap should be burned in small quantities under controlled conditions. Resultant
hafn ium oxid e can be depo sited in a land fill.

Environmental Hazards: None


VIII SPECIAL PROTECTION INFORMATION

Respiratory Protection: Wear appropriate NIOSH -approved respirator while conducting operations such as surface grinding which
will ge nerate respirable dust.

Protective Clothing: Use glov es to avoid cuts.
Eye Protection: Wear goggles or face mask while conducting operations such as surface grinding which will generate flying
particles.

-Hafnium 2-
Additional Protective Measures: Wear reflective heat resistant suit while burning fine scrap.


IX SPECIAL PRECAUTIONS

Precautions to be Taken in Handling and Storage: Machining of hafnium m ay result in fine turnings, chips or dust. Any material
with a dim ensio n less than 0.062 5 inch (1/16 in .) or a cross section less than 0.00 78 in 2 (1/16 x 1/8), if present in any quantity, can be
ignited and can sustain com bustion. K eep away fro m a ny so urce of ign ition. K eep fine turnings co mp letely d ry, or very wet. If wet,
the w ater co ntent shou ld be mo re than 25 % b y w eight for m axim um safety in handlin g. Severe explosions can result from ignition
of hafnium powder or machining fines containing moisture in the concentration range of 5 to 10%.

Other Precautions: Do not accumulate large quantities of fines or machining residues. Dispose of these materials daily.

Transpo rtation Requ irements: Departmen t of Tran sportation R equirem ents: Not hazardo us by D .O.T. Regulation s.

The abo ve inform ation is believ ed to be co rrect, but do es no t purp ort to b e all inclu sive an d sha ll be used only as a gu ide.
ESPI shall not be held liab le for any d am age resulting from h and ling o r from contact with the abov e pro duc t.


Issued by: S. Dierks
Date: September 1996




-Hafnium 3-

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