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Chemical Sampling Information (CSI)
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General Description

OSHA IMIS Code Number: 1791

Chemical Abstracts Service (CAS) Registry Number: 7439-98-7

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: QA4680000; 48793

NIOSH Pocket Guide to Chemical Hazards, Molybdenum: chemical description, physical properties, potentially hazardous incompatibilities, and more

Chemical Description and Physical Properties:

varies depending on specific compound

Incompatibilities: Alkali metals; sodium, potassium, molten magnesium

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

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 5 mg/m3 TWA

Health Factors

Potential Symptoms: In animals: anorexia; incoordination; eye, nose, throat irritation; dyspnea; anemia

Health Effects: Cumulative liver and kidney damage/Blood disorders (HE3) Irritation-Eye, Nose, Throat, Skin---Mild (HE16)

Affected Organs: Respiratory system; In animals: kidneys, blood

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: Mixed Cellulose Ester Filter (MCEF) 0.8 microns
    analytical solvent: Water Extraction
    maximum volume: 960 Liters
    minimum volume: 480 Liters
    maximum flow rate: 2.0 L/min
    current analytical method: Atomic Absorption Spectroscopy; AAS
    method reference: 2 (OSHA ID-121)
    sampling analytical error: 0.15
    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.

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