PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Isobutyronitrile 78-82-0 2284
15.01
11.01
4.08
4.05
7.01
8.00
7.00
4.10
4.07
3.02
Formula Synonyms
C4H7N ISOBUTYRONITRILE, 1-CYANO-1-METHYLETHANE, 2-CYANOPROPANE, 2-METHYLPROPANE NITRILE, 2-METHYLPROPANENITRILE, 2-METHYLPROPIONITRILE, ALPHA-METHYLPROPANENITRILE, ALPHA-METHYLPROPIONITRILE, DIMETHYLACETONITRILE, IBN, ISOBUTANENITRILE, ISOBUTIRONITRILO (DOT SPANISH), ISOBUTYRONITRILE (DOT FRENCH), ISOPROPYL CYANIDE, ISOPROPYL NITRILE, ISOPROPYLCYANIDE, PROPANENITRILE, 2-METHYL-, PROPANOIC ACID, 2-METHYL-, NITRILE
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
69.11 L -71.5 103.9 32.7 25 0.7704 @ 20°C
PAC Values
PAC Values (Original Units: ppm)
PAC-1 PAC-2 PAC-3
0.18 2.0 6.1
Converted PAC Values (mg/m3)
PAC-1 PAC-2 PAC-3
0.51 5.7 17
Technical Basis
A review of available sources identified AEGL-2 and AEGL-3 exposure limits for this chemical. The AEGLs were selected as the TEELs due to their priority among the emergency exposure limits (Section 1). Due to insufficient data, an AEGL-1 does not exist for this chemical, therefore the TEEL-1 value was derived according to Table 3.5.
• TEEL-1 = TEEL-2/11
• TEEL-2 = AEGL-2
• TEEL-3 = AEGL-3
This review generated TEEL ppm values that are consistent with Rev. 29A. Minor differences in the reported TEEL-1 and TEEL-2 values in units of mg/m3 may be due to rounding.
References
https://www.epa.gov/aegl/isobutyronitrile-results-aegl-program
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