May 1994
Immediately Dangerous to Life or Health Concentrations (IDLH)

CAS number: 100–37–8

NIOSH REL: 10 ppm (50 mg/m3) TWA [skin]

Current OSHA PEL: 10 ppm (50 mg/m3) TWA [skin]

1989 OSHA PEL: Same as current PEL

1993-1994 ACGIH TLV: 10 ppm (48 mg/m3) TWA [skin]

Description of Substance: Colorless liquid with a nauseating, ammonia-like odor.

LEL:. . Unknown

Original (SCP) IDLH: 500 ppm

Basis for original (SCP) IDLH: No useful data on acute inhalation toxicity are available on which to base the IDLH for diethylaminoethanol. The chosen IDLH is based on the following statements by Cornish [1965]: “exposure of rats to 500 ppm, 6 hours daily for 5 days, resulted in severe weight loss and high mortality. Daily exposure at 200 ppm resulted in the death of 7 of 50 rats during the first month. A single human exposure for a few seconds to a level well below 200 ppm resulted in nausea and vomiting.”

Short-term exposure guidelines: None developed


Lethal concentration data:

Species Reference LC50(ppm) LCLo(ppm) Time Adjusted 0.5-hrLC (CF) Derivedvalue
RatMouse Lomonova 1970Lomonova 1970 9241,027 ———- 4 hr? 1,848 ppm (2.0)? 185 ppm?


Lethal dose data:

Species Reference Route LD50(mg/kg) LDLo(mg/kg) Adjusted LD Derived value
Rat Smyth and Carpenter 1944 oral 1,300 —– 1,869 ppm 187 ppm


Human data: A very short exposure (<30 seconds) to a concentration estimated to be less than 100 ppm has resulted in nausea and vomiting within 5 minutes; other persons in the same room also complained of the nauseating odor but did not become ill [Cornish 1965].



1. Cornish HH [1965]. Oral and inhalation toxicity of 2-diethylaminoethanol. Am Ind Hyg Assoc J 26:479-484.

2. Lomonova GV [1970]. Toxicology data on dimethylethanolamine and diethylethanolamine. Gig Tr Prof Zabol 14(11):52-53 (translated).

3. Smyth HF Jr, Carpenter CP [1944]. The place of the range-finding test in the industrial toxicology laboratory. J Ind Hyg Toxicol 26:269-273.

Page last reviewed: December 4, 2014