Pitch, coal tar, high-temp., < 1% 4- to 5-membered condensed ring aromatic hydrocarbons

Toxicity to soil macroorganisms except arthropods

Administrative data

Endpoint:

toxicity to soil macroorganisms except arthropods: long-term

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Study based on scientific standards, acceptable for assessment

Data source

Reference

Reference Type:

publication

Title:

The effect of fluoranthene (Fla), benzo(a)pyrene (BaP) and cadmium (Cd) upon survival rate and life cycle parameter of two terrestrial annelids in laboratory test systems

Author:

Achazi, R.K.; Chroszcz, G., Duker, C.; Henneken, M.; Rothe, B.; Schaub, K.; Steudel, I.

Year:

1995

Bibliographic source:

Newslett. Enchytraeidae, 4, 7-14 (1995)

Materials and methods

Test guideline

Qualifier:

no guideline available

Principles of method if other than guideline:

Long-term terrestrial toxicity and reproduction test with annelids in laboratory test systems

GLP compliance:

no

Test material

Test material information

Constituent 1

Reference substance name:

Benzo[def]chrysene

EC Number:

200-028-5

EC Name:

Benzo[def]chrysene

Cas Number:

50-32-8

Molecular formula:

C20H12

IUPAC Name:

benzo[pqr]tetraphene

Test material form:

solid

Details on test material:

- Substance type: organic
Phys.-chem. properties (data from EU 2008: Coal-Tar Pitch, high temperature - Risk Assessment. European Union Risk Assessment Report, The Netherlands, and WHO 1998: EHC 202)
- Vapour pressure: 7.3E-7 Pa (at 25 °C)
- Water solubility: in freshwater, approx. 1.5 - 3.8 µg/L (20 - 25 °C);
- Henry's law constant: 0.034 Pa*m³/mol (at 20 °C)
- log Pow: = 6.13 - 6.5
- pKa: not applicable
- Stability in water: limited due to photolytic decomposition and evaporation
- Stability in light: instable in the presence of UV
- pH dependance on stability: not applicable

Specific details on test material used for the study:

- no further information reported

Sampling and analysis

Analytical monitoring:

not specified

Test organisms

Test organisms (species):

Eisenia fetida

Animal group:

annelids

Study design

Study type:

laboratory study

Substrate type:

artificial soil

Limit test:

no

Total exposure duration:

30 d

Results and discussion

Effect concentrations

Key result

Duration:

30 d

Dose descriptor:

EC10

Effect conc.:

2.6 mg/kg soil dw

Nominal / measured:

nominal

Conc. based on:

test mat.

Remarks:

after aging of 1 month

Basis for effect:

reproduction

Remarks on result:

other: Estimation in EU 2008: EU RAR 323 on coal-tar pitch, high temperature

Details on results:

At 40 µmoles BaP /kg soil dw (= ~ 10 mg/kg soil dw), the survival rate was 49 +-24 % (n = 7) vs. 100 % of the control. The reproduction rate was reduced to 0.28 +-0.4 vs. 2.88 +-1.49 cocoons/parent (n = 7).