NIOSH Testimony on Occupational Exposure to 4,4'-Methylenedianiline (MDA) by R. W. Niemeier, July 11, 1989.

Details

• Corporate Authors:
  National Institute for Occupational Safety and Health
• Description:
  This testimony demonstrates that NIOSH supports OSHA in developing a proposed rule for 4,4'-methylenedianiline (101779) (MDA) exposure which uses the proceedings from the MDA Mediated Rulemaking Advisory Committee. NIOSH supports a proposed permissible exposure limit of 10 parts per billion (ppb) and a short term exposure limit of 100ppb. However, because NIOSH has stated that MDA is a potential carcinogen, NIOSH continues to recommend that occupational exposures be reduced to the lowest feasible level. OSHA should consider recently published data on the assessment of workers exposed to MDA when planning the biological monitoring phase of the proposed rule. The finding of metabolites in the urine of workers involved in the production of epoxy hardeners, impregnation of carbon fiber mats, and the use of silk screening of seals and gaskets was discussed. Also considered were respiratory protection, chemical protective clothing, sampling and analytical methods, and medical surveillance. [Description provided by NIOSH]
• Content Notes:
  in NTRL, no PDF
• Subjects:
  Air Pollutants, Occupational Carcinogens Inhalation Exposure Liver Neoplasms Occupational Health Safety Skin Urogenital Diseases Urogenital System
• Keywords:
  NIOSH-Author; NIOSH-Testimony; Niemeier-R-W; Hepatotoxicity; Carcinogens; Bladder-cancer; Skin-exposure; Inhalants; Organic-vapors
• Document Type:
  Text
• Genre:
  Testimony
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-9
• NIOSHTIC Number:
  nn:00196922
• NTIS Accession Number:
  PB91169508
• Citation:
  NIOSH 1989 Jul:9 pages
• CAS Registry Number:
  4,4'-Diaminodiphenylmethane (CAS RN 101-77-9)
• Federal Fiscal Year:
  1989
• Peer Reviewed:
  False
• Source Full Name:
  NIOSH, 9 pages, 14 references
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:7dc847c09aedf140bc731323e8446b4703641ae07d6ad9e7b7238120dab30b8f7dcaa9b938d34d035f87873a0fe7fec262d5d13dcaf290925445e82b6de3b57d
• Download URL:
  https://stacks.cdc.gov/view/cdc/243013/cdc_243013_DS1.pdf
• File Type:
  [PDF - 168.02 KB ]