PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Boron 7440-42-8
18.00
3.02
3.05
3.08
3.10
5.10
10.00
Formula Synonyms
B
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
10.81 S 2075 4000 0.0119 2140 2.45
PAC Values
PAC Values (Original Units: mg/m3)
PAC-1 PAC-2 PAC-3
1.9 21 130
Converted PAC Values (ppm)
PAC-1 PAC-2 PAC-3
4.3 47 290
Technical Basis
A review of available sources identified the acute toxicity data (LD¬50) for several species and routes. Data sources were selected according to the hierarchy listed in Table 3.1. Toxicity data were selected according to type of exposure, species, and route according to the hierarchies stated in Sections 3.3.1, 3.3.2, and evaluated using factors in Tables 3.2, 3.3, and 3.4. The most preferred species and route toxicity data, a dog oral LD50, was selected as the TEEL-3 basis. TEEL-2 and TEEL-1 values were derived according to Table 3.5.
• TEEL-1 = TEEL-2/11
• TEEL-2 = TEEL-3/6
• TEEL-3 = Dog oral LD50 (310 mg/kg)
This review generated TEEL values consistent with Rev. 29A.
References
Gigiena i Sanitariya. For English translation, see HYSAAV., 35(11)(11), 1970. Retrieved from: https://pubchem.ncbi.nlm.nih.gov/compound/Boron
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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.