PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Thorium oxide; (Thorium dioxide) 1314-20-1
4.01
7.01
4.06
4.07
2.00
2.01
2.02
10.00
3.09
3.02
Formula Synonyms
O2Th THORIUM OXIDE, [RADIOACTIVE MATERIAL, LOW SPECIFIC ACTIVITY], THORIUM DIOXIDE
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
264 S 3390 4400 9.7
PAC Values
PAC Values (Original Units: mg/m3)
PAC-1 PAC-2 PAC-3
30 330 2000
Converted PAC Values (ppm)
PAC-1 PAC-2 PAC-3
2.8 31 190
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.