ZIRCONIUM COMPOUNDS (as Zr)†

Chemical Identification
Chemical Identification
CAS # 7440-67-7
Formula

Zr

Synonyms

zirconium metal: zirconium. Synonyms of other zirconium compounds vary depending upon the specific compound.

Physical Properties
Physical Properties
Physical description Soft, malleable, ductile, solid or gray to gold, amorphous powder.
Boiling point 6471°F Molecular weight 91.2
Freezing point/melting point 3375°F Vapor pressure 0 mmHg (approx)
Flash point Vapor density
Specific gravity 6.51 (metal) Ionization potential
Lower explosive limit (LEL) Upper explosive limit (UEL)
NFPA health rating NFPA fire rating
NFPA reactivity rating NFPA special instruction 0
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs
Monitoring Methods Used by OSHA
Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 2620
Sampling group
Sampler/Sampling media Pre-assembled cassette with mixed cellulose ester filter (MCEF) 0.8 micron (37 mm) [MAWP037A0]
Sampling time*

240-480 min

Sampling volume (TWA)*

480-960 L

Sampling flow rate (TWA)*

2 L/min

Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments AAS/AES
Method reference OSHA ID-121 (fully validated)
Notes

Samples are analyzed gravimetrically. Results will be qualified based on the assumption that the material sampled is as identified by the compliance officer using available documentation of materials and processes; no further work on the sample will be performed due to method limitations.

Special requirements

* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Wipe Method
Wipe Method
Sampler/Sampling media
Bulk Method
Bulk Method

Available

On-Site Screening Techniques
On-Site Screening Techniques
Device
Model/Type
Sampling information
(see manufacturer instructions)
Exposure Limits
Exposure Limits
OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
NIOSH REL
Up to 10-hour TWA
(ST) STEL
(C) Ceiling
ACGIH TLV©
8-hour TWA
(ST) STEL
(C) Ceiling
CAL/OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
PEL-TWA

5 mg/m³

REL-TWA

5 mg/m³

TLV-TWA

5 mg/m³ [1992]

PEL-TWA

5 mg/m³

PEL-STEL REL-STEL

10 mg/m³

TLV-STEL

10 mg/m³ [1992]

PEL-STEL

10 mg/m³

PEL-C REL-C TLV-C PEL-C
Skin notation

N

Skin notation

N

Skin notation

N

Skin notation

N

Notes:

See 29 CFR 1910.1000 Table Z-1.

Notes:

The REL applies to all zirconium compounds (as Zr) except Zirconium tetrachloride.

Notes: Notes:
Health factors:  See NIH-NLM PubChem. IDLH

50 mg/m³

Carcinogenic classifications: TLV-A4 Notes:

test idlh notes

AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - Zirconium, dry, coiled wire, finished metal sheets or strips

NIOSH: Pocket Guide to Chemical Hazards - Zirconium compounds (as Zr)

Literature References

  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Zirconium [7440-67-7] and compounds, as Zr. See annual publication for most recent information.

Last Updated Date : 01/14/2021