PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Isoprene 78-79-5 1218
15.01
11.01
14.02
4.08
4.05
7.01
8.00
7.00
11.00
4.07
Formula Synonyms
H2C=C(CH3)CH=CH2 ISOPRENE, INHIBITED, 1,3-BUTADIENE, 2-METHYL-, 2-METHYL-1, 3-BUTADIENE, 2-METHYL-1,3-BUTADIENE, 2-METHYLBUTA-1,3-DIENE, 2-METHYLBUTADIENE, 3-METHYL-1,3-BUTADIENE, BETA-METHYLBIVINYL, HEMITERPENE, ISOPENTADIENE, ISOPRENE, ISOPRÈNE, STABILISÉ (DOT FRENCH), ISOPRENO, INHIBIDO (DOT SPANISH), METHYL BIVINYL, UN 1218
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
68.13 L -146.7 34 400 550 0.679 @ 20°C 15000
PAC Values
PAC Values (Original Units: ppm)
PAC-1 PAC-2 PAC-3
5ₑ 1000ₑ 4000ₑ*
Converted PAC Values (mg/m3)
PAC-1 PAC-2 PAC-3
14 2800 11000
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.