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Ethyl butyl ketone

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

CAS number: 106–35–4

NIOSH REL: 50 ppm (230 mg/m3) TWA

Current OSHA PEL: 50 ppm (230 mg/m3) TWA

1989 OSHA PEL: Same as current PEL

1993-1994 ACGIH TLV: 50 ppm (234 mg/m3) TWA

Description of Substance: Colorless liquid with a powerful, fruity odor.

LEL:. . Unknown

Original (SCP) IDLH: 3,000 ppm

Basis for original (SCP) IDLH: The chosen IDLH is based on the statements by Patty [1963] and Deichmann and Gerarde [1969] that 0 rats died following a 4-hour exposure to 2,000 ppm, but 6 of 6 rats died following a 4-hour exposure to 4,000 ppm [Smyth et al. 1949].

Short-term exposure guidelines: None developed


Lethal concentration data:






Adjusted 0.5-hr




RatSmyth et al. 1949LC100: 4,000-----4 hr8,000 ppm (2.0)800 ppm

Lethal dose data:







Adjusted LD

Derived value
RatSmyth et al. 1949oral2,760-----4,067 ppm408 ppm

Other animal data: It has been reported that rats survived a 4-hour exposure to 2,000 ppm [Smyth et al. 1949].

Human data: None relevant for use in determining the revised IDLH.

Revised IDLH: 1,000 ppm

Basis for revised IDLH: The revised IDLH for ethyl butyl ketone is 1,000 ppm based on acute inhalation toxicity data in animals [Smyth et al. 1949].


1. Deichmann WB, Gerarde HW [1969]. Table 50. Toxicity of ketones. In: Toxicology of drugs and chemicals. New York, NY: Academic Press, Inc., p. 736.

2. Patty FA, ed. [1963]. Industrial hygiene and toxicology. 2nd rev. ed. Vol. II. Toxicology. New York, NY: Interscience Publishers, Inc., p. 1741.

3. Smyth HF Jr, Carpenter CP, Weil CS [1949]. Range-finding toxicity data: list III. J Ind Hyg Toxicol 31:60-62.

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