Zirconium compounds (as Zr)

Synonyms & Trade Names
Zirconium
CAS No.
7440-67-7 (Metal)
RTECS No.
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
NA
Specific Gravity
6.51 (Metal)
Flash Point
NA
Upper Exposive Limit
NA
Lower Explosive Limit
NA
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

See also
INTRODUCTION   ICSC CARD: 1405   MEDICAL TESTS: 0247
Page last reviewed: November 29, 2018