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alpha-Alumina (Respirable Fraction)
#1
General Description
  • Synonyms: Aluminum Oxide (2:3); alpha-Aluminum Oxide; beta-Aluminum Oxide; gamma-Aluminum Oxide; Aluminum Sesquioxide
  • OSHA IMIS Code Number: A201
  • IMIS Name History: alpha-Alumina (Total Dust) from 7/17 to 9/1/89
  • Chemical Abstracts Service (CAS) Registry Number: 1344-28-1
  • NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: www.cdc.gov/niosh-rtecs/BD124F80.html
  • NIOSH Pocket Guide to Chemical Hazards, www.cdc.gov/niosh/npg/npgd0021.html: chemical description, physical properties, potentially hazardous incompatibilities, and more
Exposure Limits
  • OSHA Permissible Exposure Limit (PEL):
    • General Industry: www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=9992&p_text_version=FALSE -- 5 mg/m3 TWA
    • Maritime: www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=10286&p_text_version=FALSE -- 5 mg/m3 TWA

  • American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 1 mg/m3TWA; Respirable fraction; see Appendix C, paragraph C; Appendix A4 - Not Classifiable as a Human Carcinogen (Listed under Aluminum metal and Insoluble compounds)
  • National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): www.cdc.gov/niosh/npg/nengapdxd.html - Substances With No Established RELs
Health Factors
  • See www.osha.gov/dts/chemicalsampling/data/CH_217970.html#health.
Monitoring Methods used by OSHA
Laboratory Sampling/Analytical Method:
Federal OSHA and OSHA State Plan personnel submitting samples to the OSHA Salt Lake Technical Center Laboratory for alpha-alumina analysis must use the tared gravimetric sampling media described immediately below.
  • tared 37-mm diameter low-ash polyvinyl chloride filter preceded by 10 mm Nylon Cyclone
  • maximum volume: 816 Liters
  • minimum volume: 408 Liters
  • flow rate: 1.7 L/min
  • current analytical method: Gravimetric
  • method reference: OSHA Analytical Method (www.osha.gov/dts/sltc/methods/partial/pv2121/pv2121.html)
  • 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.
  • note: Refer to Chemical Sampling Information for "www.osha.gov/dts/chemicalsampling/data/CH_217980.html or www.osha.gov/dts/chemicalsampling/data/CH_217975.html" when sampling workplaces that have aluminum metal exposures (grinding, etc.).
  • method classification: Partially Validated
  •  
  • alternate analytical method: Inductively Coupled Argon Plasma; ICP/AES, ICP/MS
  • 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. The method also does not distinguish between aluminum oxide and other aluminum compounds (e.g. aluminum phosphate, aluminum metal, etc.).

On-Site Sampling Techniques/Methods:
  • Mixed Cellulose Ester Filter (MCEF) 0.8 µm preceded by 10 mm Nylon Cyclone
  • maximum volume: 816 Liters
  • minimum volume: 408 Liters
  • flow rate: 1.7 L/min
  • note: Refer to Chemical Sampling Information for "www.osha.gov/dts/chemicalsampling/data/CH_217980.html or www.osha.gov/dts/chemicalsampling/data/CH_217975.html" when sampling workplaces that have aluminum metal exposures (grinding, etc.).
  • current elemental analysis method: Lithium Borate Fusion/AAS or Microwave Digestion/AAS
  • method reference: OSHA Analytical Method (www.osha.gov/dts/sltc/methods/inorganic/t-id109sg-pv-02-0110-m/t-id109sg-pv-02-0110-m.html or www.osha.gov/dts/sltc/methods/inorganic/id198sg/id198sg.html)
  • method classification: Partially Validated
  •  
  • alternate analytical method: Inductively Coupled Argon Plasma; ICP/AES, ICP/MS
  • 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. The method also does not distinguish between aluminum oxide and other aluminum compounds (e.g. aluminum phosphate, aluminum metal, etc.).
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#2
Aluminum oxide is an oxide of aluminum, occurring in nature as various minerals such as bauxite, corundum, etc. It is used as an adsorbent, desiccating agent, and catalyst, and in the manufacture of dental cements and refractories.
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