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Dibutyl phosphate																				Related Pages
										May 1994
Immediately Dangerous to Life or Health Concentrations (IDLH)
**CAS number:** 107–66–4
**NIOSH REL:** 1 ppm (5 mg/m3) TWA, 2 ppm (10 mg/m3) STEL
**Current OSHA PEL:** 1 ppm (5 mg/m3) TWA
**1989 OSHA PEL:** 1 ppm (5 mg/m3) TWA, 2 ppm (10 mg/m3) STEL
**1993-1994 ACGIH TLV:** 1 ppm (8.6 mg/m3) TWA, 2 ppm (17 mg/m3) STEL
**Description of Substance:** Pale-amber, odorless liquid.
**LEL:**. . Unknown
**Original (SCP) IDLH:** 125 ppm
**Basis for original (SCP) IDLH:** No data on acute inhalation toxicity are available on which to base an IDLH for dibutyl phosphate. Therefore, the chosen IDLH is based on an analogy with tributyl phosphate which has an IDLH of 125 ppm.
**Short-term exposure guidelines:** None developed
**ACUTE TOXICITY DATA**
**Animal or human data:** None relevant for use in determining the revised IDLH.
**Revised IDLH:** 30 ppm **Basis for revised IDLH:** Due to the lack of relevant acute toxicity data, the revised IDLH for dibutyl phosphate is 30 ppm based on an analogy to tributyl phosphate which has a revised IDLH of 30 ppm.

			
							
								Page last reviewed:  December 4, 2014						Content
							source: 	National Institute for Occupational Safety and Health NIOSH Publications & Products
Immediately Dangerous To Life or Health (IDLH) Values
Table of IDLH Values
Criteria for Determining IDLH Values
Historical Documentation
Original (SCP) Values
Abbreviations for IDLH Documentation
Abbreviations for Journal Titles Follow NIOSH Facebook
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