Benzo(a)pyrene

Benzo(a)pyrene
SMILES
C1=CC=C2C3=C4C(=CC2=C1)C=CC5=C4C(=CC=C5)C=C3
CAS number
50-32-8
Formula
C20 H12
Molecular weight
252.32g/mol
Melting point
179  tM/°C reference 1
Entropy of fusion
35.8  ΔfusS/J K-1 mol-1 reference 1

Vapor pressure

t/°C PS/Pa PL/Pa log (PL/Pa) method and notes reference
25 1.31E-7 2.31E-5 -4.64 EPI Suite estimation
25 1.41E-5 -4.85 Literature-derived value (LDV) 1
25 7.94E-6 -5.1 Final adjusted value (FAV) 1

Water solubility

t/°C SWS/mol m-3 SWL/mol m-3 log (SWL/mol m-3) method and notes reference
25 5.75E-5 -4.24 Literature-derived value (LDV) 1
25 1.05E-4 -3.98 Final adjusted value (FAV) 1

Henry's law constant

t/°C H/Pa m3 mol-1 KAW log (KAW) method and notes reference
25 1.78E-5 -4.75 EPI Suite estimation
25 2.04E-5 -4.69 Literature-derived value (LDV) 1
25 3.09E-5 -4.51 Final adjusted value (FAV) 1

Octanol-water partition ratio

t/°C KOW log (KOW) method and notes reference
25 1.29E+6 6.11 EPI Suite estimation
25 9.77E+5 5.99 Literature-derived value (LDV) 1
25 1.12E+6 6.05 Final adjusted value (FAV) 1

Octanol-air partition ratio

t/°C KOA log (KOA) method and notes reference
25 7.23E+10 10.9 EPI Suite estimation
25 3.63E+11 11.6 Literature-derived value (LDV) 1
25 3.02E+11 11.5 Final adjusted value (FAV) 1

Half-life for degradation in air

t/°C half-life/day method and notes reference
25 0.2 EPI Suite estimation
25 7.1 Suggested half-life class 2

Half-life for degradation in water

t/°C half-life/day method and notes reference
25 60 EPI Suite estimation
25 71 Suggested half-life class 2

Half-life for degradation in soil

t/°C half-life/day method and notes reference
25 120 EPI Suite estimation
25 710 Suggested half-life class 2

Half-life for degradation in sediment

t/°C half-life/day method and notes reference
25 542 EPI Suite estimation
25 2300 Suggested half-life class 2

References

1.
Ma, Y.G., Lei, Y.D., Xiao, H., Wania, F., Wang, W. J. Chem. Eng. Data 2010, 55, 819-825.
2.
Mackay, D., Shiu, W.Y., Ma, K., Lee, S.C. Handbook of physical-chemical properties and environmental fate for organic chemicals. Volume I. CRC Press. 2006.