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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

NIOSH/OSHA/DOE Health Guideline: Dimethylaniline

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