Chemical characteristics of asbestos and associated trace elements.

Details

• Personal Author:
  Cralley LJ ; Morgan A
• Description:
  Chemical characteristics of asbestos (1332214) and its associated trace elements are reviewed. Asbestiform minerals can be classified as serpentine or amphibole according to their crystal structure. Chrysotile (12001295) is the sole commercial representative of the serpentine class and accounts for over 90 percent of asbestos produced. The five amphibole varieties used commercially are amosite (12172735), anthophyllite (16829439), crocidolite (12001284), actinolite (12172677), and tremolite (14567738). The minerals most commonly found in association with chrysotile include actinolite, antigorite (12135863), awaruite (12413819), chlorite (1318598), chromite (1308312), magnesite (13717005), nemalite (1317437), and talc (14807966). Neutron activation analysis (NAA) can be used to measure concentrations of chromium (7440473), cobalt (7440484), iron (7439896), manganese (7439965), and scandium (7440202) in asbestos samples; nickel (7440020) can also be determined by atomic absorption spectrophotometry (AAS). NAA is more sensitive than AAS for evaluating the concentrations of the majority of elements. Emission spectrography may also be used for the analysis of the same range of chemicals; the accuracy of this method is inferior to that achieved with either AAS or NAA. Acids attack chrysotile by reacting with the hydroxyl groups on the surface of the fibrils. Intrinsic differences in solubility are attributed mainly to variations in the porosity of fiber bundles. Evidence suggests that chrysotile magnesium dissolves readily in- vivo. The concentrations of chromium, nickel, and cobalt in amosite and crocidolite is about 1 or 2 orders of magnitude lower than in chrysotile. The amphiboles are much more resistant to attack by acids than is chrysotile. The authors conclude that magnesium removal may have an effect on the cytotoxicity and carcinogenicity of chrysotile. [Description provided by NIOSH]
• Subjects:
  Air Pollutants, Occupational Air Pollution, Indoor Asbestos Biological Factors Environmental Monitoring Inorganic Chemicals Occupational Health Safety
• Keywords:
  Air-contamination Air-sampling Asbestos-dusts Asbestos-fibers Asbestos-workers Asbestosis Biological-factors Physiological-disorders Physiological-function
• ISBN:
  9789283211082
• Publisher:
  International Agency for Research on Cancer (IARC)
• Document Type:
  Text
• Genre:
  Book
• Place as Subject:
  Ohio ; OSHA Region 5
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  113-118
• NIOSHTIC Number:
  nn:00150460
• Citation:
  Biological effects of asbestos. Bogovski P, Gilson JC, Timbrell V, Wagner JC, eds. Lyon, France: International Agency for Research on Cancer, IARC Scientific Publication No. 8 1973 Dec; :113-118
• CAS Registry Number:
  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) ; Amosite asbestos (CAS RN 12172-73-5) ; Antigorite (Mg3H2(SiO4)2.H2O) (CAS RN 12135-86-3) ; Asbestos (CAS RN 1332-21-4) ; Awaruite (CAS RN 12413-81-9) ; Brucite (Mg(OH)2) (CAS RN 1317-43-7) ; Chlorite-group minerals (CAS RN 1318-59-8) ; Chromite (Cr2FeO4) (CAS RN 1308-31-2) ; Chromium (CAS RN 7440-47-3) ; Chrysotile (CAS RN 12001-29-5) ; Cobalt (CAS RN 7440-48-4) ; Crocidolite asbestos (CAS RN 12001-28-4) ; Iron (CAS RN 7439-89-6) ; Magnesio-anthophyllite (CAS RN 16829-43-9) ; Magnesite (CAS RN 13717-00-5) ; Manganese (CAS RN 7439-96-5) ; Nickel (CAS RN 7440-02-0) ; Scandium (CAS RN 7440-20-2) ; Talc (Mg3H2(SiO3)4) (CAS RN 14807-96-6) ; Tremolite (Ca2[(Mg0.9-1Fe0-0.1)4.5-5Al0-0.5](Si7.5-8Al0-0.5)(OH)2O22) (CAS RN 14567-73-8)
• Editor(s):
  Bogovski P; Gilson JC; Timbrell V; Wagner JC
• Federal Fiscal Year:
  1974
• Peer Reviewed:
  False
• Source Full Name:
  Biological effects of asbestos, IARC Scientific Publication No. 8
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:f5c8580309b4a6019154893c14a9b1e9bc3868285d613128c8a496fbecb8120b9c56a369a6c3b0cbb00d9cadf4a31ff9d4da96069f55c2a8e30b6918f153ac3d
• Download URL:
  https://stacks.cdc.gov/view/cdc/184870/cdc_184870_DS1.pdf
• File Type:
  [PDF - 369.64 KB ]