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

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

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

Primary Laboratory Sampling/Analytical Method (SLC1):

• sampling media: 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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