Zirconium compounds (as Zr)

Synonyms & Trade Names

Zirconium

CAS No.

7440-67-7 (Metal)

RTECS No.

ZH7070000 (Metal)

DOT ID & Guide

1358 170(powder, wet)
1932 135(scrap)
2008 135(powder, dry)

Formula

Zr (Metal)

Conversion

IDLH

25 mg/m³ (as Zr)
See: 7440677

Exposure Limits

NIOSH REL

TWA 5 mg/m³ ST 10 mg/m³ [*Note: The REL applies to all zirconium compounds (as Zr) except Zirconium tetrachloride.]

OSHA PEL

TWA 5 mg/m³ See Appendix G

Measurement Methods

NIOSH 7300 , 7301 , 9102;
OSHA ID121
See: NMAM or OSHA Methods

Physical Description

Metal: Soft, malleable, ductile, solid or gray to gold, amorphous powder.

Molecular Weight

91.2

Boiling Point

6471°F

Melting Point

3375°F

Solubility

Insoluble

Vapor Pressure

0 mmHg (approx)

Ionization Potential

Specific Gravity

6.51 (Metal)

Flash Point

Upper Explosive Limit

Lower Explosive Limit

Metal: Combustible, but solid form is difficult to ignite; however, powder form may ignite SPONTANEOUSLY and can continue burning under water.

Incompatibilities & Reactivities

Potassium nitrate, oxidizers [Note: Fine powder may be stored completely immersed in water.]

Exposure Routes

inhalation, skin and/or eye contact

Symptoms

Skin, lung granulomas; In Animals: irritation skin, mucous membrane; X-ray evidence of retention in lungs

Target Organs

Skin, respiratory system

Personal Protection/Sanitation

(See protection codes)
Skin:Recommendations regarding personal protective clothing vary depending upon the specific compound.
Eyes:Recommendations regarding eye protection vary depending upon the specific compound.
Wash skin: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.
Change: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.

First Aid

(See procedures)
Eye:Irrigate immediately
Skin:Soap wash
Breathing:Respiratory support
Swallow:Medical attention immediately

Respirator Recommendations

NIOSH/OSHA

Up to 25 mg/m³:
(APF = 5) Any quarter-mask respirator.
Click here for information on selection of N, R, or P filters.

Up to 50 mg/m³:
(APF = 10) Any particulate respirator equipped with an N95, R95, or P95 filter (including N95, R95, and P95 filtering facepieces) except quarter-mask respirators. The following filters may also be used: N99, R99, P99, N100, R100, P100.
Click here for information on selection of N, R, or P filters.
(APF = 25) Any powered, air-purifying respirator with a high-efficiency particulate filter./

(APF = 50) Any air-purifying, full-facepiece respirator with an N100, R100, or P100 filter.
Click here for information on selection of N, R, or P filters.

(APF = 10) Any supplied-air respirator
(APF = 50) Any self-contained breathing apparatus with a full facepiece

Emergency or planned entry into unknown concentrations or IDLH conditions:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus

Escape:

(APF = 50) Any air-purifying, full-facepiece respirator with an N100, R100, or P100 filter.
Click here for information on selection of N, R, or P filters.

Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

Zirconium compounds (as Zr)

NIOSH REL

OSHA PEL

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