Compound Abbreviation Structure(# of rings) Formula Molecular weight (g/mol) Solubility (mg/L) Melting point (°C) Boiling point (°C) Vapor tension (Pa) at 25°C Coefficient octanol/H2O (log Kow) Carcinogenicity IARC (2008) Carcinogenicity NTP (2005) Carcinogenicity IPCS (1998) Carcinogenicity NRCC (1983)
Naphthalene (S) Naph 2 C10H8 128.17 31 81 217.9 10.4 3.40 2B   (?) 0
Acenaphthene (S) Ace 3 C12H8 154.21 3.8 95 279 2.9x10-1 3.92 3   (?) 0
Fluorene (S) Fl 3 C13H10 166.22 1.9 115-116 295 8.0x10-2 4.18 3   - 0
Phenanthrene (S) Phen 3 C14H10 178.23 1.1 100.5 340 1.6x10-2 4.60 3   (?) 0
Anthracene (S) Ant 3 C14H10 178.23 0.045 216.4 342 8.0x10-4 4.50 3   - 0
Fluoranthene (C) Flt 4 C16H10 202.26 0.26 108.8 375 1.2x10-3 5.22 3   + 0
Pyrene (C) Pyr 4 C16H10 202.26 0.132 150.4 393 6.0x10-4 5.18 3   (?) 0
Benzo(a)anthracene (C) B[a]A 4 C18H12 228.29 0.011 160.7 400 2.8x10-5 5.61 2B Yes + +
Chrysene (C) Chry 4 C18H12 228.29 0.0015 253.8 448 8.4x10-5 (20°C) 5.91 2B Yes + ±
Benzo(b)fluoranthene (C) B[b]F 5 C20H12 252.32 0.0015 168.3 481 6.7x10-5 (20°C) 6.12 2B Yes + ++
Benzo(k)fluoranthene (C) B[k]F 5 C20H12 252.32 0.0008 215.7 480 1.3x10-8 (20°C) 6.84 2B Yes + 0
Benzo(a)pyrene (C) B[a]P 5 C20H12 252.32 0.0038 178.1 496 7.3x10-7 6.50 1 Yes + +++
Dibenz(a,h)anthracene (C) D[ah]A 6 C22H14 278.35 0.0005 266.6 524 5.3x10-8 (20°C) 6.50 2A Yes + +++
Benzo(g,h,i)perylene (C) B[ghi]Per 6 C22H12 276.34 0.00026 278.3 545 1.4x10-8 7.10 3   (?) 0
Indeno(1,2,3cd)pyrene (C) I[1,2,3-cd]P 6 C22H12 276.34 0.062 163.6 536 1.3x10-8 (20°C) 6.58 2B Yes + +
                1 demonstrated carcinogenic
2A probable carcinogenicity
2B  possible carcinogenicity
3 carcinogenicity not demonstrated  
+ positive
- negative
? uncertain
( ) insufficient evidence
0 not carcinogenic
±  uncertain carcinogenicity
+ carcinogenic  
Table 3: PAH compounds detected in rubber crumb samples. Abbreviations: S – petrogenic; C – pyrogenic. Grey shades indicate carcinogenicity, determined in at least three published studies, and degree of carcinogenicity.