o-cresol

Toxicity to soil microorganisms

Administrative data

Endpoint:

toxicity to soil microorganisms

Data waiving:

exposure considerations

Justification for data waiving:

the study does not need to be conducted because direct and indirect exposure of the soil compartment is unlikely

Justification for type of information:

No experimental study on toxicity to soil microorganisms is available. A long-term toxicity test on soil microorganisms is not relevant according to column 2 of Annex X of REACH Regulation EC 1907/2006, as the risk assessment does not indicate the need to investigate further the effects of the substance on terrestrial organisms. The substance is readily biodegradable and not considered adsorpitve with a logKOW < 3 (log KOW = 1.95) and a logKOC < 3 (1.34 at 20°C). It will not be present in ionized form at environmentally relevant pH (4-9) as indicated by the Dissociation constand with pKa = 10.29 at 25°C. Since the substance is not specifically toxic towards aquatic organisms it falls into Soil Hazard Category 1. Risk to soil organisms exposed to the substance is acceptable based on the PNECsoil calculated using the Equilibrium Partitioning Method therefore, no specific testing is required for the toxicity of o-cresol to soil microorganisms.

Materials and methods

Test material

Test material information

Constituent 1

Reference substance name:

o-cresol

EC Number:

202-423-8

EC Name:

o-cresol

Cas Number:

95-48-7

Molecular formula:

C7H8O

IUPAC Name:

o-cresol