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Chemical Sampling Information (CSI)
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General Description

Synonyms: N,N-Dimethylaniline

OSHA IMIS Code Number: 0931

Chemical Abstracts Service (CAS) Registry Number: 121-69-7

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: BX4725000; 8212

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: UN 2253 Poison

Chemical Description and Physical Properties:
straw- to brown-colored liquid with a characteristic amine-like odor
molecular weight: 121
boiling point: 379°F
vapor pressure: < 1 mm
melting point: 36°F
Incompatibilities: Strong oxidizers, strong acids

Exposure Limits

OSHA Permissible Exposure Limit (PEL):
General Industry: 5 ppm, 25 mg/m3 (Skin)

Construction Industry: 5 ppm, 25 mg/m3 TWA (Skin)
American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 5 ppm, 25 mg/m3 TWA; 10 ppm, 50 mg/m3 STEL (Skin); Appendix A4 (Not Classifiable as a Human Carcinogen)

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 5 ppm TWA (Skin), 10 ppm STEL (Skin)

Health Factors

Potential Symptoms: Anoxia symptoms, cyanosis; weakness, dizziness, ataxia

Health Effects: Methemoglobinemia (HE13); CNS effects (HE7)

Affected Organs: Blood, kidneys, liver, CVS

Additional Information:

  • Occupational Health Guidelines for Chemical Hazards. US Department of Health and Human Services (DHHS), National Institute for Occupational Safety and Health (NIOSH) Publication No. 81-123, (1981, January). Provides a table of contents of guidelines for many hazardous chemicals. The files provide technical chemical information, including chemical and physical properties, health effects, exposure limits, and recommendations for medical monitoring, personal protective equipment (PPE), and control procedures.
Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):
  • sampling media: Coated XAD-7 Tube (80/40 mg sections) Coating is 10% Phosphoric Acid
    analytical solvent: 0.2 N NH4OH in Methanol
    maximum volume: 30 Liters
    maximum flow rate: 0.2 L/min
    current analytical method: Gas Chromatography; GC/FID
    method reference: 2 (OSHA PV2064)
    method classification: Partially Validated

Conditions: Column: 60m x 0.32 mm ID with 1 micron film RTX-5 Temperatures (deg C): 120 Oven, 200 Inj, 250 Detector

Secondary Laboratory Sampling/Analytical Method (SAM2):

  • device: Detector Tube
    company:     Gastec
    part #: 181
    range:     2.5-45 ppm
    class: Mfg

  • device: Instrumentation
    company:     Infrared Spectrophotometer
    part #: MIRAN 1A & 1B
    range:     0.7 ppm @ 8.6 um
    class: Mfg
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