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Chemical Datasheet

ZIRCONIUM, DRY, COILED WIRE, FINISHED METAL SHEETS OR STRIPS

4.1 - Flammable solid

Chemical Identifiers

CAS Number UN/NA Number DOT Hazard Label USCG CHRIS Code
  • 7440-67-7
  • 2858
  • Flammable Solid
none
NIOSH Pocket Guide International Chem Safety Card
Zirconium compounds (as Zr)
  • ZIRCONIUM
NFPA 704
data unavailable
General Description
A grayish-white hard lustrous metal. Specific gravity 6.4. Melting point about 3362°F (1850°C). Insoluble in water. Low toxicity.

Hazards

Reactivity Alerts
none
Air & Water Reactions
Flammable and explosive as dust or powder and in the form of borings or shavings, but not in bulk form. May ignite on contact with air or moist air. Insoluble in water.
Fire Hazard
Excerpt from 170 Polymerizable warning [Metals (Powders, Dusts, Shavings, Borings, Turnings, or Cuttings, etc.)]:

May react violently or explosively on contact with water. Some are transported in flammable liquids. May be ignited by friction, heat, sparks or flames. Some of these materials will burn with intense heat. Dusts or fumes may form explosive mixtures in air. Containers may explode when heated. May re-ignite after fire is extinguished. (ERG, 2020)
Health Hazard
Excerpt from 170 Polymerizable warning [Metals (Powders, Dusts, Shavings, Borings, Turnings, or Cuttings, etc.)]:

Oxides from metallic fires are a severe health hazard. Inhalation or contact with substance or decomposition products may cause severe injury or death. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may cause environmental contamination. (ERG, 2020)
Reactivity Profile
ZIRCONIUM, DRY, COILED WIRE, FINISHED METAL SHEETS OR STRIPS is a bulk form of an active metal (a reducing agent). It ignites if exposed to high temperatures and burns with an intense flame. The bulk metal (as in wire, sheets, and strips) is less reactive than powdered metal. Soluble in hot very concentrated acids; insoluble in water and cold acids. Corrosion resistant [Hawley]. Can react explosively with potassium chlorate, potassium nitrate, copper(II) oxide, or lead oxide, Can react explosively if heated with lithium hydroxide, sodium hydroxide, or potassium hydroxide). May react similarly with hydrated sodium borate and alkali-metal oxosalts (chromates, dichromates, molybdates, sulfates, tungstates) [Mellor, 1941, Vol. 7, 116; Military and Civilian Pyrotechnics, Ellern, 1968, 249]. May react with saltwater to generate hydrogen particularly if in contact with another metal. NFPA 482M, 1974, covers all aspects of storage and handling of zirconium, listing 43 abstracts of unusual zirconium fires and explosions.
Belongs to the Following Reactive Group(s)
Potentially Incompatible Absorbents

No information available.

Response Recommendations

Isolation and Evacuation
Excerpt from 170 Polymerizable warning [Metals (Powders, Dusts, Shavings, Borings, Turnings, or Cuttings, etc.)]:

IMMEDIATE PRECAUTIONARY MEASURE: Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids.

LARGE SPILL: Consider initial downwind evacuation for at least 50 meters (160 feet).

FIRE: If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2020)
Firefighting
Excerpt from 170 Polymerizable warning [Metals (Powders, Dusts, Shavings, Borings, Turnings, or Cuttings, etc.)]:

DO NOT USE WATER, FOAM OR CO2. Dousing metallic fires with water will generate hydrogen gas, an extremely dangerous explosion hazard, particularly if fire is in a confined environment (i.e., building, cargo hold, etc.). Use DRY sand, graphite powder, dry sodium chloride-based extinguishers, or class D extinguishers. Confining and smothering metal fires is preferable rather than applying water. If it can be done safely, move undamaged containers away from the area around the fire.

FIRE INVOLVING TANKS OR CAR/TRAILER LOADS: If impossible to extinguish, protect surroundings and allow fire to burn itself out. (ERG, 2020)
Non-Fire Response
Excerpt from 170 Polymerizable warning [Metals (Powders, Dusts, Shavings, Borings, Turnings, or Cuttings, etc.)]:

ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area. Do not touch or walk through spilled material. Stop leak if you can do it without risk. Prevent entry into waterways, sewers, basements or confined areas. (ERG, 2020)
Protective Clothing
Excerpt from NIOSH Pocket Guide for Zirconium compounds (as Zr):

Skin: RECOMMENDATIONS REGARDING PERSONAL PROTECTIVE CLOTHING VARY DEPENDING UPON THE SPECIFIC COMPOUND. - Recommendations regarding personal protective clothing vary depending upon the specific compound.

Eyes: RECOMMENDATIONS REGARDING EYE PROTECTION VARY DEPENDING UPON THE SPECIFIC COMPOUND. - Recommendations regarding eye protection vary depending upon the specific compound.

Wash skin: RECOMMENDATIONS REGARDING WASHING THE SKIN VARY DEPENDING UPON THE SPECIFIC COMPOUND. - Recommendations regarding washing the skin vary depending upon the specific compound.

Remove: RECOMMENDATIONS REGARDING THE REMOVAL OF PERSONAL PROTECTIVE CLOTHING THAT BECOMES WET OR CONTAMINATED VARY DEPENDING UPON THE SPECIFIC COMPOUND. - Recommendations regarding the removal of personal protective clothing that becomes wet or contaminated vary depending upon the specific compound.

Change: RECOMMENDATIONS REGARDING THE DAILY CHANGING OF PERSONAL PROTECTIVE CLOTHING VARY DEPENDING UPON THE SPECIFIC COMPOUND. - Recommendations regarding the daily changing of personal protective clothing vary depending upon the specific compound.

Provide: RECOMMENDATIONS REGARDING THE NEED FOR EYEWASH OR QUICK DRENCH FACILITIES VARY DEPENDING UPON THE SPECIFIC COMPOUND. - Recommendations regarding the need for eyewash or quick drench facilities vary depending upon the specific compound. (NIOSH, 2023)
DuPont Tychem® Suit Fabrics
No information available.
First Aid
Excerpt from NIOSH Pocket Guide for Zirconium compounds (as Zr):

Eye: IRRIGATE IMMEDIATELY - If this chemical contacts the eyes, immediately wash (irrigate) the eyes with large amounts of water, occasionally lifting the lower and upper lids. Get medical attention immediately.

Skin: SOAP WASH - If this chemical contacts the skin, wash the contaminated skin with soap and water.

Breathing: RESPIRATORY SUPPORT - If a person breathes large amounts of this chemical, move the exposed person to fresh air at once. If breathing has stopped, perform artificial respiration. Keep the affected person warm and at rest. Get medical attention as soon as possible.

Swallow: MEDICAL ATTENTION IMMEDIATELY - If this chemical has been swallowed, get medical attention immediately. (NIOSH, 2023)

Physical Properties

Chemical Formula:
  • Zr
Flash Point: data unavailable
Lower Explosive Limit (LEL): data unavailable
Upper Explosive Limit (UEL): data unavailable
Autoignition Temperature: data unavailable
Melting Point: 3375°F (NIOSH, 2023)
Vapor Pressure: 0 mmHg (approx) (NIOSH, 2023)
Vapor Density (Relative to Air): data unavailable
Specific Gravity: 6.51 (Metal) (NIOSH, 2023) - Denser than water; will sink
Boiling Point: 6471°F at 760 mmHg (NIOSH, 2023)
Molecular Weight: 91.2 (NIOSH, 2023)
Water Solubility: Insoluble (NIOSH, 2023)
Ionization Energy/Potential: data unavailable
IDLH: 25 mg Zr/m3 (NIOSH, 2023)

AEGLs (Acute Exposure Guideline Levels)

No AEGL information available.

ERPGs (Emergency Response Planning Guidelines)

No ERPG information available.

PACs (Protective Action Criteria)

Chemical PAC-1 PAC-2 PAC-3
Zirconium (7440-67-7) 10 mg/m3 83 mg/m3 500 mg/m3
(DOE, 2018)

Regulatory Information

EPA Consolidated List of Lists

No regulatory information available.

CISA Chemical Facility Anti-Terrorism Standards (CFATS)

No regulatory information available.

OSHA Process Safety Management (PSM) Standard List

No regulatory information available.

Alternate Chemical Names