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Aluminum (as Al), Welding Fumes

General Description

  • Synonyms: Aluminum; Aluminium; Aluminum, elemental
  • OSHA IMIS Code Number: A102
  • Chemical Abstracts Service (CAS) Registry Number: 7429-90-5
  • NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: BD0330000
  • Department of Transportation Regulation Number (49 CFR 172.101) and Emergency Response Guidebook: 1309 170 (powder, coated); 1396 138 (powder, uncoated)
  • NIOSH Pocket Guide to Chemical Hazards, Aluminum (pyro powders and welding fumes, as Al): Physical description, chemical properties, potentially hazardous incompatibilities, and more

Exposure Limits and Health Effects

Exposure Limit Limit Values HE Codes Health Factors and Target Organs
OSHA Permissible Exposure Limit (PEL) Not established    
National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL) 5 mg/m3 TWA HE10 Lung changes that may lead to pulmonary fibrosis; chronic respiratory diseases such as pneumoconiosis and bronchitis
American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV)  Withdrawn in 2004    
CAL/OSHA PEL 5 mg/m3 TWA    
  • National Toxicology Program (NTP) carcinogenic classification: Not listed
  • International Agency for Research on Cancer (IARC) carcinogenic classification: Not listed
  • U.S. Environmental Protection Agency (EPA) carcinogenic classification: Not listed
  • EPA Inhalation Reference Concentration (RfC): Not established
  • Agency for Toxic Substances and Disease Registry (ATSDR) Inhalation Minimal Risk Level (MRL): Not established
  • NIOSH Immediately Dangerous to Life or Health (IDLH) concentration: Not listed
  • Notes on Other Potential Health Effects and Hazards
    1. Impairment of cognitive function, motor dysfunction, and peripheral neuropathy have been reported in limited studies of workers exposed to aluminum fumes (NLM 2012).
    2. Chronic occupational exposure to aluminum dust and fumes can cause signs of cholestasis (Bogdanovic and Bulat 2008).

    Literature Basis

    Date Last Revised: 9/6/2012

Monitoring Methods used by OSHA

Federal OSHA and OSHA State Plan personnel submitting samples to the OSHA Salt Lake Technical Center Laboratory for analysis must use the tared gravimetric sampling media described immediately below.
Laboratory Sampling/Analytical Method:
  • tared 37-mm diameter low-ash polyvinyl chloride filter
  • maximum volume: 960 Liters
  • minimum volume: 480 Liters
  • maximum flow rate: 2.0 L/min
  • current analytical method: Gravimetric
  • method reference: OSHA Analytical Method (OSHA ID-121)
  • method classification: Partially Validated
  • note: OSHA personnel can obtain tared sampling media from the Salt Lake Technical Center.
  • note: If the net weight of the sample yields a concentration below the standard for the substance, the Salt Lake Technical Center will perform no further work on that sample. If the net weight corresponds to an amount greater than the standard, the sample may be analyzed for the appropriate element and the result reported as the substance.
  • current elemental analysis method: Lithium Borate Fusion/AAS or Microwave Digestion/AAS
  • method reference: OSHA Analytical Method (OSHA ID-109-SG) or OSHA ID-198SG)
  • method classification: Partially Validated
  • note: Submit as a separate sample. When analysis of a compound is requested, an elemental analysis is performed and reported as the compound. The analytical method does not distinguish between dust and fume.

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