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Table 1 Acute and chronic aquatic toxicity data and calculations used for CTPHT classification by the summation method (RAC [29])

From: Challenges in the regulatory use of water-accommodated fractions for assessing complex substances

PAH Measured mean concentration (ng/L) in WAF test at CTPHT loading rate of 100 mg/L Acute classification Chronic classification
Lowest aquatic E/LC50 (mg/L) Content in CTPHT (% w/w) Multiplying factor (M) M x content in CTPHT (% w/w) Concen tration limit (%) Content in CTPHT/ concentration limit Content in CTPHT (% w/w)/ E/LC50 Lowest aquatic NOEC or EC10 (mg/L) M M x content in CTPHT (% w/w)/ E/LC50
Naphthalene < LOQ 1.0 0 1 0 25 0 0 0.020 1 0
Acenaphthylene < LOQ 1.8 0   0 0.064 1 0
Acenaphthene 63.3 0.58 0.043 1 0.043 25 0.00172 0.074 0.038 1 0.043
Fluorene 53.9 0.025 0.047 10 0.47 2.5 0.0188 1.88 0.025 1 0.047
Anthracene 56 0.001 0.13 1000 130 0.025 5.2 130 0.0015 10 1.3
Phenanthrene 252 0.051 0.63 10 6.3 2.5 0.252 12.4 0.01 10 6.3
Pyrene 240 0.00023 0.95 1000 950 0.025 38 4130 0.0005 100 95
Chrysene 80.1 0.0007a 0.81 1000 810 0.025 32.4 1157 ND 1000b 810
Benz[a]anthracene 71.9 0.0018 0.77 100 77 0.25 3.08 428 0.0012 10 7.7
Fluoranthene 318 0.0001 1.1 10000 11000 0.0025 440 11000 0.0006 100 110
Benzo[a]pyrene 35.4 0.0012a 1.0 100 100 0.25 4 833 0.0005 100 100
Benzo[b]fluoranthene 33.2 > WS 1.2 ND NC NC
Benzo[k]fluoranthene < LOQ 0.00065 0.61 1000 610 0.025 24.4 938 0.00017 100 61
Dibenz[a,h]anthracene < LOQ 0.0018 0.17 100 17 0.25 0.68 94.4 0.00014 100 17
Benzo[ghi]perylene < LOQ > WS 0.87 0.000082 1000 870
Indeno[1,2,3-cd]pyrene < LOQ 0.00027 0.91 1000 910 0.025 36.4 3370 0.00027 100 91
Total 1204 (0.0012%)   9.2   14521   581 21280    2169
  1. LOQ limit of quantitation, WS water solubility
  2. avalue derived in presence of UV light, ND no data; bbased on acute data; NC not classified