NIOSH Pocket Guide to Chemical Hazards


CAS 121-69-7


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


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 See: 121697 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 140F and below 200F.
Incompatibilities & Reactivities
Strong oxidizers, strong acids, benzoyl peroxide
Measurement Methods
NIOSH 2002; OSHA PV2064
See: NMAM or OSHA Methods
Personal Protection & Sanitation (See protection)
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
Important additional information about respirator selection
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
(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   See ICSC CARD: 0877   See MEDICAL TESTS: 0085