PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Butyl chloroformate, sec- 17462-58-7 2742
14.01
14.02
11.01
7.01
11.00
4.07
4.01
4.11
Formula Synonyms
C5.H9.Cl.O2 SEC-BUTYL CHLOROFORMATE, BUT-2-YL CHLOROFORMATE, CHLOROFORMIATE DE SEC-BUTYLE (DOT FRENCH), CHLOROFORMIC ACID SEC-BUTYL ESTER, CLOROFORMIATO DE SEC-BUTILO (DOT SPANISH), FORMIC ACID, CHLORO-, SEC-BUTYL ESTER
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
136.58 L 1.074
PAC Values
PAC Values (Original Units: ppm)
PAC-1 PAC-2 PAC-3
0.20 2.2 6.7
Converted PAC Values (mg/m3)
PAC-1 PAC-2 PAC-3
1.1 12 37
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). Table S-1 reports AEGLs in units of mg/m3 that are significantly different than what would be expected for conversion at standard temperature and pressure (STP; 25°C, 1 atm). The reported TEEL-2 is 27 mg/m3, while a converted TEEL-2 is 12 mg/m3. Similarly, the reported TEEL-3 is 80 mg/m3, while a converted TEEL-3 is 37 mg/m3. Considering this, the TEEL-3 and TEEL-2 ppm values were converted to units of mg/m3 at STP; these converted values were then rounded to two significant figures (Section 3.4.7.2). TEEL-1 values were derived according to Table 3.5.
• TEEL-1 = TEEL-2/11
• TEEL-2 = AEGL-2
• TEEL-3 = AEGL-3
This review generated TEEL values consistent with Rev. 29A*. Use of converted and rounded AEGLs in units of mg/m3, instead of using the values reported (Section 3.4.7.2), is in accordance with Section 4.2-4.3.
References
AEGLs (pg. 166) and chemical information (Table 2-1, pg. 11) retrieved from: https://www.epa.gov/aegl/sec-butyl-chloroformate-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.