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CAS number: 540885
NIOSH REL: 200 ppm (950 mg/m3) TWA
Current OSHA PEL: 200 ppm (950 mg/m3) TWA
1989 OSHA PEL: Same as current PEL
19931994 ACGIH TLV: 200 ppm (950 mg/m3) TWA
Description of Substance: Colorless liquid with a fruity odor.
LEL: . . 1.5% (10% LEL, 1,500 ppm)
Original (SCP) IDLH: 10,000 ppm
Basis for original (SCP) IDLH: The chosen IDLH is based on an analogy with nbutyl acetate for which an IDLH of 10,000 ppm was chosen. No other data on acute inhalation toxicity are available on which to base the IDLH for tertbutyl acetate.
Shortterm exposure guidelines: None developed
ACUTE TOXICITY DATA
Animal data: None relevant for use in determining the revised IDLH.
Human data: Exposures of 200 to 300 ppm cause slight irritation of the eyes and nose, and short exposures to 3,300 ppm cause extreme irritation of the eyes and nose [ILO 1983].
| Revised IDLH: 1,500 ppm [LEL]
Basis for revised IDLH: Based on health considerations, acute inhalation toxicity data in humans [ILO 1983], and an analogy to nbutyl acetate, a value of about 2,500 ppm would have been appropriate for tertbutyl acetate. However, the revised IDLH for tertbutyl acetate is 1,500 ppm based strictly on safety considerations (i.e., being 10% of the lower explosive limit of 1.5%). |
REFERENCE:
1. ILO [1983]. Butyl acetate. In: Encyclopaedia of occupational
health and safety. Third (revised) edition. Vol. I (AK).
Geneva, Switzerland: International Labour Office, pp. 782783.
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