PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Tetrahydromethyl-1,3-isobenzofurandione, 3A,4,7,7A-; (Methyltetrahydrophthalic anhydride) 26590-20-5
11.01
15.01
15.02
Formula Synonyms
C9.H10.O3
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
166.19 S 1.20
PAC Values
PAC Values (Original Units: mg/m3)
PAC-1 PAC-2 PAC-3
7.7 85 510
Converted PAC Values (ppm)
PAC-1 PAC-2 PAC-3
1.1 13 75
Technical Basis
No technical basis available
References
Search Again
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.