PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Benzo(a)anthracene 56-55-3
4.06
2.00
3.02
Formula Synonyms
C18H12 BENZ[A]ANTHRACENE, 1,2-BENZ(A)ANTHRACENE, 1,2-BENZANTHRACENE, 1,2-BENZANTHRENE, 1,2-BENZOANTHRACENE, 1,2-BENZ[A]ANTHRACENE, 2,3-BENZOPHENANTHRENE, 2,3-BENZPHENANTHRENE, B(A)A, BA, BAA, BENZANTHRACENE, BENZANTHRENE, BENZO(A)ANTHRACENE, BENZO(A)PHENANTHRENE, BENZOANTHRACENE, BENZO[A]ANTHRACENE, BENZO[B]PHENANTHRENE, NAPHTHANTHRACENE, RCRA WASTE NUMBER U018, TETRAPHENE
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
228.29 S plates 160.5 437.6 20
PAC Values
PAC Values (Original Units: ppm)
PAC-1 PAC-2 PAC-3
0.13 1.4 8.5
Converted PAC Values (mg/m3)
PAC-1 PAC-2 PAC-3
1.2 13 79
Technical Basis
A review of available sources found toxicity data for this chemical. The rat intravenous LD50 rat data was selected as the TEEL-3 basis. TEEL-2 and TEEL-1 values were calculated in accordance with guidelines in the handbook (Table 3.5.)

TEEL-1 = TEEL-2/11
TEEL-2 = TEEL-3/6
TEEL-3 = Rat Intravenous LD50 (> 200 mg/kg)

This review resulted in more conservative TEEL-2 and TEEL-3 values than those reported in Rev. 29A. In Rev. 29A, the TEEL basis was a structurally similar chemical, Benz[a]pyrene, while the current recommendation basis is toxicity data for the chemical of interest, Benz[a]anthracene.
References
https://www.cdc.gov/niosh-rtecs/CV8D8678.html
https://pubchem.ncbi.nlm.nih.gov/compound/Benz_a_anthracene
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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.