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Chemical Sampling Information (CSI)
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General Description

Synonyms: Hexavalent Uranium

OSHA IMIS Code Number: 2561

Chemical Abstracts Service (CAS) Registry Number: 7440-61-1

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: YR3590000

Chemical Description and Physical Properties:

solid; appearance, odor, and properties vary depending upon specific compound

Incompatibilities: Uranyl nitrates: combustibles, Uranium hexafluoride: water

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: 0.05 mg/m3

Construction Industry: 0.2 mg/m3 TWA

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 0.2 mg/m3 TWA; 0.6 mg/m3 STEL; Appendix A1 (Confirmed Human Carcinogen)

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 0.05 mg/m3 TWA; Potential carcinogen

Health Factors

Potential Symptoms: Lacrimation, conjunctivitis; shortness of breath, coughing, chest rales; nausea, vomiting; skin burns; red blood cells, casts in urine; albuminuria, high blood urea nitrogen; (carcinogenic)

Health Effects: Cumulative kidney damage (HE3)

Affected Organs: Respiratory system, blood, liver, lymphatics, kidneys, skin, bone marrow

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: Tared Low Ash Polyvinyl Chloride (LAPVC) filter 5 microns
    analytical solvent: Deionized Water
    maximum volume: 960 Liters
    minimum volume: 200 Liters
    maximum flow rate: 2.0 L/min
    current analytical method: Differential Pulse Cathodic Stripping Polarography; DPCSP
    method reference: 2 (OSHA In-House File)
    sampling analytical error: 0.10
    method classification: Partially Validated
    note: Submit as a separate sample. If the filter is not overloaded, samples may be collected up to an 8-hour period. Soluble means electrolyte soluble.

  • sampling media: Mixed Cellulose Ester Filter (MCEF) 0.8 microns
    analytical solvent: Deionized Water
    maximum volume: 960 Liters
    minimum volume: 480 Liters
    maximum flow rate: 2.0 L/min
    current analytical method: Inductively Coupled Argon Plasma; ICP/DCP-AES
    method reference: 2 (OSHA In-House File)
    method classification: Not Validated
    note: Submit as a separate sample. If the filter is not overloaded, samples may be collected up to an 8-hour period. Soluble means water soluble.

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