PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Methylpropene, 2-; (Isobutene) 115-11-7 1055
17.00
8.00
11.00
11.01
15.01
15.02
7.00
4.01
4.05
4.07
Formula Synonyms
C4H8 ISOBUTYLENE, 1,1-DIMETHYLETHENE, 1,1-DIMETHYLETHYLENE, 1-PROPENE, 2-METHYL-, 2-METHYL-1-PROPENE, 2-METHYL-2-PROPENE, 2-METHYLPROPENE, 2-METHYLPROPYLENE, GAMMA-BUTYLENE, I-BUTENE, ISO-BUTENE, ISOBUTENE, ISOBUTILENO (DOT SPANISH), ISOBUTYLÈNE (DOT FRENCH), ISOPROPYLIDENEMETHYLENE, LIQUEFIED PETROLEUM GAS, PROPENE, 2-METHYL-, UN 1055, UN 1075, UNSYM. DIMETHYLETHYLENE
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
56.12 L or G -140.3 -6.9 2308 25 0.6 18000
PAC Values
PAC Values (Original Units: ppm)
PAC-1 PAC-2 PAC-3
750 2500* 11000**
Converted PAC Values (mg/m3)
PAC-1 PAC-2 PAC-3
1700 5700 25000
Technical Basis
No technical basis available
References
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PAC values marked with a subscript "A" correspond to 60-minute AEGL values.
PAC values marked with a subscript "E" correspond to ERPG values.
PAC values marked by * are >= 10% lower explosive limit (LEL) but < 50% LEL.
PAC values marked by ** are > 50% LEL but < 100% LEL.
PAC values marked by *** are >= LEL.