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Zirconium Compounds (as Zr)

General Description

  • OSHA IMIS Code Number: 2620
  • Chemical Abstracts Service (CAS) Registry Number: 7440-67-7
  • NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: ZH7070000
  • Chemical Description and Physical Properties:
    • solid; appearance, odor, and properties vary depending upon specific compound
  • Incompatibilities: ZrCl: water, moist air, alkali metals; ZrH2: strong oxidizers

Exposure Limits

  • OSHA Permissible Exposure Limit (PEL):
    • General Industry: 5 mg/m3
    • Construction Industry: 5 mg/m3 TWA
  • American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 5 mg/m3 TWA; 10 mg/m3 STEL; Appendix A4 (Not Classifiable as a Human Carcinogen)
  • National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 5 mg/m3 TWA; 10 mg/m3 STEL

Health Factors

  • Potential Symptoms: Skin granulomas; In animals: X-ray evidence of retention in lungs; skin, mucous membrane irritation
  • Health Effects: Pneumoconiosis (HE10); Lung and skin granulomas (HE3)
  • Affected Organs: Respiratory system, skin

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):
  • Tared Low Ash Polyvinyl Chloride (LAPVC) filter 5 microns
  • maximum volume: 960 Liters
  • minimum volume: 480 Liters
  • maximum flow rate: 2.0 L/min (TWA)
  • maximum volume: 30 Liters
  • maximum flow rate: 2.0 L/min (STEL)
  • current analytical method: Gravimetric analysis
  • method reference: 11, 12
  • sampling and analytical error: 0.10
  • method classification: Fully Validated
  • alternate analytical method: Atomic Absorption Spectroscopy; AAS
  • method reference: 2 (OSHA ID-121)
  • method classification: Fully Validated
  • note: Submit as a separate sample. If the gross weight sample yields a concentration below the standard for the air contaminant, do not submit the sample to the Salt Lake Technical Center for analysis.

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