Synonyms: Dianisidine; 3,3'-Dianisidine; 3,3'-Dimethoxybenzidine

OSHA IMIS Code Number: D116

Chemical Abstracts Service (CAS) Registry Number: 119-90-4

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: DD0875000

NIOSH Pocket Guide to Chemical Hazards, o-Dianisidine: chemical description, physical properties, potentially hazardous incompatibilities, and more

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): Carcinogen-Lowest Feasible Concentration

Primary Laboratory Sampling/Analytical Method (SLC1):

• sampling media: Polytetrafluoroethylene Filter 5 micron
  maximum volume: 500 Liters
  maximum flow rate: 3.0 L/min
  current analytical method: High Performance Liquid Chromatography; HPLC/UL47
  method reference: 1 (NIOSH 5013 [28 KB PDF, 5 pages])
  method classification: Fully Validated
  note: This method does not differentiate between different o-Dianisidine Dyes. Protect samples from heat & light.
  
  sampling media: Glass Fiber Filter (37 mm)
  maximum volume: 100 Liters
  maximum flow rate: 1 L/min
  current analytical method: High performance liquid chromatography; HPLC/UV/Visible
  method reference: 2 (OSHA In-House File)
  method classification: Not Validated
  note: This method differentiates between different o-dianisidine based dyes. See individual dye of interest. Protect samples from heat & light.

Conditions: Column: C18 Mobile Phase: Detector Wavelength: 280nm Detection Limit: 20.4ug/sample

Wipe Sampling Method:

• sampling media: Glass Fiber Filter

Bulk Method:

• For any dye analysis, a bulk sample of the dye must be sent to the Salt Lake Technical Center. Limit the amount of bulk submitted to one gram or approx. one mL.

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