# NIOSH Pocket Guide to Chemical Hazards
N,N-Dimethylaniline | CAS 121-69-7
C6H5N(CH3)2 | RTECS BX4725000
Synonyms & Trade Names N,N-Dimethylbenzeneamine; N,N-Dimethylphenylamine [Note: Also known as Dimethylaniline which is a correct synonym for Xylidine.] | DOT ID & Guide 2253 153
Exposure Limits | NIOSH REL: TWA 5 ppm (25 mg/m3) ST 10 ppm (50 mg/m3) [skin]
OSHA PEL†: TWA 5 ppm (25 mg/m3) [skin]
IDLH 100 ppm | Conversion 1 ppm = 4.96 mg/m3
Physical Description Pale yellow, oily liquid with an amine-like odor. [Note: A solid below 36°F.]
MW: 121.2 | BP: 378°F | FRZ: 36°F | Sol: 2%
VP: 1 mmHg | IP: 7.14 eV |  | Sp.Gr: 0.96
Fl.P: 142°F | UEL: ? | LEL: ? |
Class IIIA Combustible Liquid: Fl.P. at or above 140°F and below 200°F.
Incompatibilities & Reactivities Strong oxidizers, strong acids, benzoyl peroxide
Measurement Methods NIOSH 2002; OSHA PV2064
Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet or contaminated Change: No recommendation Provide: Quick drench | First Aid (See procedures) Eye: Irrigate immediately Skin: Soap wash immediately Breathing: Respiratory support Swallow: Medical attention immediately
Respirator Recommendations NIOSH Up to 50 ppm: (APF = 10) Any supplied-air respirator Up to 100 ppm: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode/(APF = 50) Any self-contained breathing apparatus with a full facepiece/(APF = 50) Any supplied-air respirator with a full facepiece Emergency or planned entry into unknown concentrations or IDLH conditions: (APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode/(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus Escape: (APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister/Any appropriate escape-type, self-contained breathing apparatus
Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms Anoxia symptoms: cyanosis, lassitude (weakness, exhaustion), dizziness, ataxia; methemoglobinemia
Target Organs Blood, kidneys, liver, cardiovascular system
See also: INTRODUCTION