PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Methyl acetylene 74-99-7
8.00
17.00
11.01
7.01
7.00
4.07
7.11
7.10
3.05
10.00
Formula Synonyms
C3H4 1-PROPYNE, PROPYNE
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
40.07 G -102.7 -23.3 4310 25 .607 (p> 1 atm) 17000
PAC Values
PAC Values (Original Units: ppm)
PAC-1 PAC-2 PAC-3
230 2500* 15000**
Converted PAC Values (mg/m3)
PAC-1 PAC-2 PAC-3
380 4100 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.