MATERIAL SAFETY DATA SHEET
I PRODUCT IDENTIFICATION
Trade Name: Hafnium Hydride Synonym: None
Chemical Family: Metallic Hydrides Formula: HfH1.6-2.0
CAS #: 12656-74-5
II HAZARDOUS INGREDIENTS
Hafnium Hydride, HfH1.6-2.0 %: >96 CAS #: 12656-74-5 TWA: 0.5 STEL: N/A
Zirconium Hydride, ZrH %: 0.05-3 CAS #: 11105-16-1 TWA: 5 STEL: 10
III PHYSICAL DATA
Boiling Point 760 mm Hg: N/A Vapor Density (Air=L): N/A
0 @ 20 oC
pH of Solutions: N/A Vapor Pressure:
Evolves hydrogen above 300 oC
Freezing/Melting Point: Evaporation Rate: None
250-340 lb/ft3 varying with particle size
Bulk Density: % Volatile by Volume: Nonvolatile
Specific Gravity (H2O=L): 11.48 Heat of Solutions: N/A
Appearance and Odor: Grey to black powder, odorless. Solubility (in H2O): Insoluble
IV FIRE AND EXPLOSION HAZARDS DATA
Ignition Point: Chips: 350 oC; Powder: 190 oC, Aerosol: 20 oC
Minimum Explosible Concentration: Not available
Extinguishing Media: Dry table salt or Type D fire extinguisher.
Fire Fighting Procedures: If hydride fines become ignited it is advisable to allow the material to burn out. Fires can be controlled
by smothering with dry table salt or using type D dry-powder fire extinguishing material. Wear reflective heat resistant suit and self-
contained breathing apparatus.
Unusual Fire & Explosion Hazard: Do not spray water on burning hafnium fines, chips, powder or sponge as a violent explosion
may result. This hazard increases with finer particles. Carbon dioxide is not effective in extinguishing burning hafnium.
V HEALTH HAZARD INFORMATION
Routes of Entry: Inhalation: No, Ingestion: No, Skin: No, Skin/Eye Contact: No
Target Organs: None known
Toxicity Data: Hafnium hydride has no known toxicity.
Corrosive: No Carcinogen: No Sensitizer: No
Comments: No industrial disease has been evident with up to 20 years exposed to hafnium compounds.
Acute Effects from Exposure: None known
Chronic Effects from Exposure: None known
References: NIOSH/OSHA - Occupational Health Guidelines for Chemical Hazards Casarett and Doull鈥檚 Toxicology, 2nd Edition
OSHA 20 CFR 1910 Table Z-1-A, Jan. 1989.
EMERGENCY AND FIRST AID PROCEDURES:
EYE CONTACT: Normal procedure for inert foreign object.
SKIN CONTACT: Normal procedure for cuts from sharp metal.
INHALATION: N/A
INGESTION: N/A
VI REACTIVITY DATA
Stability: Stable at room temperature.
Conditions to Avoid: High temperature, evolves hydrogen above 300 oC. Keep away from flame or sparks-flammable solid
Hazardous Polymerization: Will not Occur
Incompatibility (Material to Avoid): Hafnium Hydride is rapidly dissolved by hydrofluoric acid or hydrofluoric-nitric acid mix-
tures. Above 200 oC, hafnium hydride reacts exothermically with fluorine, chlorine, bromine, iodine and with halocarbons, including
carbon tetrachloride, carbon tetrafluoride and Freons.
Hazardous Decomposition Products: Evolves hydrogen when heated above 300 oC. The above reactions with incompatible
materials will generate hazardous reaction products such as flammable hydrogen, toxic fumes of nitrogen oxides or corrosive hafnium
halide vapors.
VII SPILL OR LEAK PROCEDURES
Steps to Be Taken in Case Material Is Released or Spilled: Handle in small quantities. Store in sealed cans or drums, preferably
with an argon atmosphere. Store in a dry area away from heat and oxidizing agents.
Waste Disposal Method: Do not accumulate large quantities of fines or residues. Dispose of these materials daily in accordance
with Local, State and Federal Regulations.
Environmental Hazards: None
VIII SPECIAL PROTECTION INFORMATION
Respiratory Protection: Wear appropriate NIOSH-approved respirator while conducting operations such as surface grinding which
will generate respirable dust.
Protective Clothing: Use gloves to avoid cuts.
Eye Protection: Wear goggles or face mask while conducting operations such as surface grinding which will generate flying par-
ticles or powder.
IX SPECIAL PRECAUTIONS
Transportation Requirements:
Land:
DOT Class: Flammable Solid (truck)
Shipping Name: Flammable Solids, N.O.S.
ID Number: UN 3178
Packing Group: II
Hazard Class: 4.1
Labels Required: Flammable Solid
Emergency Response #: 32
Air & Ocean:
IATA/IMDG Shipping Name: Flammable Solid, Inorganic, N.O.S.
ID Number: Un 3178
Packing Group: II
Hazard Class: 4.1
Labels Required: Flammable Solid
Emergency Response #: 32
Section 313 Supplier Notification: This product contains the following chemicals subject to the reporting requirements of Section
313 of the Emergency Planning and Community Right-To-Know Act of 1986 (40 CFR 372): None
In addition to the ingredients listed in Section 2, this product contains the following chemicals considered by the State of
California Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65) as causing cancer or reproductive toxicity and
for which warnings are now required: None
The comprehensive Environmental Response, Compensation, and Liability Act of 1990, Sec 102 (40 CFR 302) requires that
any 鈥渞elease鈥? into the 鈥渆nvironment鈥? of these hazardous substances contained in a product in excess of the 鈥渞eportable quantity鈥? in
any 24 hour period must be immediately reported to the National Response Center (800-424-8802). Reporting is not required under
certain circumstances such as federally permitted release or the release of certain metal solid particles with a diameter larger than 100
Micrometers: None
The Superfund Amendments and Re-authorization Act of 1986 (40 CFR 355) specifies certain emergency planning and
notification requirements if these extremely hazardous substances are present in concentrations of greater than 1% at a facility in
amounts greater than the threshold planning quantity: None
If this product is discarded as a waste, it would be identified with the following hazardous waste classification under the
Resource Conservation and Recovery Act (40 CFR 261). The act specifies requirements for the management and disposal of hazard-
ous wastes: Not hazardous.
Ingredients on Canadian 鈥淚ngredient Disclosure List鈥?: None
Prepared by: S. Dierks
Dated: April 1996
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