# NIOSH Pocket Guide to Chemical Hazards
Diethanolamine | CAS 111-42-2
(HOCH2CH2)2NH | RTECS KL2975000
Synonyms & Trade Names DEA; Di(2-hydroxyethyl)amine; 2,2'-Dihydroxydiethyamine; Diolamine; bis(2-Hydroxyethyl)amine; 2,2'-Iminodiethanol | DOT ID & Guide
Exposure Limits | NIOSH REL: TWA 3 ppm (15 mg/m3)
OSHA PEL†: none
IDLH N.D. | Conversion 1 ppm = 4.30 mg/m3
Physical Description Colorless crystals or a syrupy, white liquid (above 82°F) with a mild, ammonia-like odor.
MW: 105.2 | BP: 516°F (Decomposes) | MLT: 82°F | Sol: 95%
VP: <0.01 mmHg | IP: ? |  | Sp.Gr: 1.10
Fl.P: 279°F | UEL: 9.8% | LEL: 1.6% |
Class IIIB Combustible Liquid Combustible Solid
Incompatibilities & Reactivities Oxidizers, strong acids, acid anhydrides, halides [Note: Reacts with CO2 in the air. Hygroscopic (i.e., absorbs moisture from the air). Corrosive to copper, zinc & galvanized iron.]
Measurement Methods NIOSH 3509; OSHA PV2018
Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet or contaminated Change: Daily Provide: Eyewash, Quick drench | First Aid (See procedures) Eye: Irrigate immediately Skin: Water flush immediately Breathing: Respiratory support Swallow: Medical attention immediately
Respirator Recommendations To be added later
Exposure Routes inhalation, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin, nose, throat; eye burns, corneal necrosis; skin burns; lacrimation (discharge of tears), cough, sneezing
Target Organs Eyes, skin, respiratory system
See also: INTRODUCTION