Immediately Dangerous to Life or Health Concentrations (IDLH)
CAS number: 111–44–4
NIOSH REL: 5 ppm (30 mg/m3) TWA, 10 ppm (60 mg/m3) STEL [skin]; NIOSH considers dichloroethyl ether to be a potential occupational carcinogen as defined by the OSHA carcinogen policy [29 CFR 1990].
Current OSHA PEL: 15 ppm (90 mg/m3) CEILING [skin]
1989 OSHA PEL: 5 ppm (30 mg/m3) TWA, 10 ppm (60 mg/m3) STEL [skin]
1993-1994 ACGIH TLV: 5 ppm (29 mg/m3) TWA, 10 ppm (58 mg/m3) STEL [skin]
Description of Substance: Colorless liquid with a chlorinated solvent-like odor.
LEL:. . 2.7% (10% LEL, 2,700 ppm)
Original (SCP) IDLH: 250 ppm
Basis for original (SCP) IDLH: The chosen IDLH is based on the statements by Patty  that 250 ppm caused death in rats from a 4-hour exposure [Carpenter et al. 1949] and that 500 to 1000 ppm might cause death in guinea pigs from an exposure of only 30 to 60 minutes duration [Schrenk et al. 1933].
Short-term exposure guidelines: None developed
ACUTE TOXICITY DATA
Lethal concentration data:
|Species||Reference||LC50(ppm)||LCLo(ppm)||Time||Adjusted 0.5-hrLC (CF)||Derivedvalue|
|Carpenter et al. 1949Izmerov et al. 1982
Izmerov et al. 1982
Schrenk et al. 1933
|4 hr4 hr
|500 ppm (2.0)154 ppm (2.0)
243 ppm (1.6)
625 ppm (1.25)
1,075 ppm (2.15)
|50 ppm15 ppm
Human data: Volunteers found brief (undefined) exposures to 100 to 260 ppm to be tolerable, although irritating [Schrenk et al. 1933].
|Revised IDLH: 100 ppmBasis for revised IDLH: The revised IDLH for dichloroethyl ether is 100 ppm based on acute inhalation toxicity data in humans [Schrenk et al. 1933]. This may be a conservative value due to the lack of relevant acute toxicity data for workers exposed to concentrations above 100 ppm. [Note: NIOSH recommends as part of its carcinogen policy that the “most protective” respirators be worn for dichloroethyl ether at concentrations above 5 ppm.]|
1. Carpenter CP, Smyth HF Jr, Pozzani C . The assay of acute vapor toxicity, and the grading and interpretation of results on 96 chemical compounds. J Ind Hyg Toxicol 31:343-346.
2. Izmerov NF, Sanotsky IV, Sidorov KK . Toxicometric parameters of industrial toxic chemicals under single exposure. Moscow, Russia: Centre of International Projects, GKNT, p. 45.
3. Marhold J . Prehled Prumyslove Toxikologie, Organicke Latky. Prague, Czechoslovakia: Avicenum, p. 541 (in Czechoslovakian).
4. Patty FA, ed. . Industrial hygiene and toxicology. 2nd rev. ed. Vol. II. Toxicology. New York, NY: Interscience Publishers, Inc., p. 1675.
5. Schrenk HH, Patty FA, Yant WP . Acute response of guinea pigs to vapors of some new commercial organic compounds. VII. Dichloroethyl ether. Public Health Rep 48(46):1389-1398.
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- Page last updated: December 4, 2014
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