[No public or meaningful name is available]

Short-term toxicity to aquatic invertebrates

Link to relevant study record(s)

Reference

Endpoint:

short-term toxicity to aquatic invertebrates

Type of information:

other: Expert assessment

Adequacy of study:

key study

Study period:

July 2022

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Expert assessment

Principles of method if other than guideline:

Expert assessment - no guideline followed

GLP compliance:

no

Key result

Remarks on result:

other: An expert assessment has been performed using a weight of evidence approach.

Conclusions:

Based on the available data on the major constituents of the amorphous carbon and silicon dioxide recovered from two-stage pyrolysis of spent tyres (EC 954-402-4), it can be concluded that the dissolved fraction of the substance will not be classified as acutely or chronically toxic to aquatic invertebrates.

However, additional testing is rendered necessary to assess the particulate toxicity of the nanomaterial. Long-term toxicity testing with Daphnia is recommended for the particulate substance to account for mechanical effects in aquatic invertebrates and the potential for bioaccumulation.

Executive summary:

The test item is a UVCB. An expert assessment has been prepared to replace short term testing with a weight of evidence approach for the dissolved fraction of the substance. This assessment discusses the acute aquatic toxicity potential of the substance based on data availible for all major constituents of the substance. Furthermore, an additional assessment for particle toxicity has been proposed and discussed.

Based on the available data on the major constituents of the amorphous carbon and silicon dioxide recovered from two-stage pyrolysis of spent tyres (EC 954-402-4), it can be concluded that the dissolved fraction of the substance will not be classified as acutely or chronically toxic to aquatic invertebrates.

However, additional testing is rendered necessary to assess the particulate toxicity of the nanomaterial. Long-term toxicity testing with Daphnia is recommended for the particulate substance to account for mechanical effects in aquatic invertebrates and the potential for bioaccumulation.

 

 

Description of key information

Based on the available data on the major constituents of the amorphous carbon and silicon dioxide recovered from two-stage pyrolysis of spent tyres (EC 954-402-4), it can be concluded that the dissolved fraction of the substance will not be classified as acutely or chronically toxic to aquatic invertebrates.

However, additional testing is rendered necessary to assess the particulate toxicity of the nanomaterial. Long-term toxicity testing with Daphnia is recommended for the particulate substance to account for mechanical effects in aquatic invertebrates and the potential for bioaccumulation.