NIOSH testimony on occupational exposure to asbestos, tremolite, anthophyllite, and actinolite by J. D. Millar, July 17, 1986.

Details

• Corporate Authors:
  National Institute for Occupational Safety and Health
• Description:
  This testimony restated the definition currently in place at NIOSH for asbestos (1332214). Concern had arisen following the issuance of an internal memorandum by Mr. Robert Glenn who was director of the Division of Respiratory Disease Studies at NIOSH. This memorandum did not change the position of NIOSH concerning the definition of asbestos as it concerns regulatory purposes. The definition remained as follows. Asbestos is defined to be chrysolite (12001295), crocidolite (12001284), and fibrous cummingtonite-grunerite including amosite (12172735), fibrous tremolite (14567738), fibrous actinolite (13768008), and fibrous anthophyllite (17068789). The fibrosity of the above minerals is ascertained on a microscopic level with fibers defined as being particles with an aspect ratio of 3 to 1 or larger. At present the evidence documenting a health effect from exposure to nonfibrous cummingtonite-grunerite including amosite, fibrous tremolite, fibrous actinolite, and fibrous anthophyllite was insufficient and therefore the nonfibrous forms of these minerals were excluded from the asbestos definition.
• Subjects:
  Accidents, Occupational Chemistry Manufacturing And Industrial Facilities Occupational Health Safety Toxicology Workplace
• Keywords:
  Airborne-fibers Asbestos-workers Fibrous-dusts NIOSH-Author NIOSH-Testimony Occupational-exposure
• Document Type:
  Text
• Genre:
  Testimony
• Place as Subject:
  Maine ; OSHA Region 1 ; OSHA Region 3 ; West Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DRDS - Division of Respiratory Disease Studies
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1
• NIOSHTIC Number:
  nn:00190674
• Citation:
  NIOSH 1986 Jul; :1
• CAS Registry Number:
  Asbestos (CAS RN 1332-21-4) ; Chrysotile (CAS RN 12001-29-5) ; Crocidolite asbestos (CAS RN 12001-28-4) ; Amosite asbestos (CAS RN 12172-73-5) ; Tremolite (Ca2[(Mg0.9-1Fe0-0.1)4.5-5Al0-0.5](Si7.5-8Al0-0.5)(OH)2O22) (CAS RN 14567-73-8) ; Actinolite (Ca2[(Mg0.5-0.89Fe0.11-0.5)4.5-5Al0-0.5](Si7.5-8Al0-0.5)(OH)2O22) (CAS RN 12172-67-7) ; Anthophyllite (CAS RN 17068-78-9)
• Federal Fiscal Year:
  1986
• Peer Reviewed:
  False
• Source Full Name:
  NIOSH, 1 page
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:8f42275e6fde47d1b6536f4509ae950be131062c297510141bec19097679e62128a5c73ea0944c0844b87d9b60561b3699c07b2e2988064ed7d07a7adc87863d
• Download URL:
  https://stacks.cdc.gov/view/cdc/180262/cdc_180262_DS1.pdf
• File Type:
  [PDF - 119.92 KB ]