PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Styrene 100-42-5 2055
6.00
14.01
11.01
15.02
4.01
4.05
7.01
8.00
7.00
11.00
Formula Synonyms
C8H8 STYRENE MONOMER, INHIBITED, CINNAMENE, CINNAMENOL, CINNAMOL, DIAREX HF 77, ESTIRENO, MONÓMERO DE, INHIBIDO (DOT SPANISH), ETHENYL BENZENE, ETHENYLBENZENE, NCI-C02200, PHENETHYLENE, PHENYLETHENE, PHENYLETHYLENE, STYRENE, STYRENE MONOMER, STYRÈNE MONOMÈRE, STABILISÉ (DOT FRENCH), STYROL, STYROLE, STYROLENE, STYRON, STYROPOL, STYROPOL SO, STYROPOR, UN 2055, VINYL BENZENE, VINYLBENZENE, VINYLBENZOL
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
104.15 L -30.65 145 7.5 28.6 0.9016 9000
PAC Values
PAC Values (Original Units: ppm)
PAC-1 PAC-2 PAC-3
20 130 1100
Converted PAC Values (mg/m3)
PAC-1 PAC-2 PAC-3
85 550 4700
Technical Basis
A review of available sources identified AEGLs for this chemical. The AEGLs were selected as the TEELs due to their priority among the emergency exposure limits (Section 1). Values in units mg/m3 are reported as published in the Summary Table, per handbook guidance (Section 3.4.7.2).
• TEEL-1 = AEGL-1
• TEEL-2 = AEGL-2
• TEEL-3 = AEGL-3
This review generated TEEL ppm values consistent with Rev. 29A. The difference in the reported TEEL-3 value in units mg/m3 may be due to conversion and rounding of this value, instead of use of the source value. Note: The AEGL-3 value requires safety considerations against the hazard(s) of explosion(s)” (≥10% LEL).
References
AEGLs (Summary table, pg. x) and chemical information (Table 1) retrieved from: https://www.epa.gov/aegl/styrene-results-aegl-program
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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.