Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Short-term toxicity to aquatic invertebrates

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

Two reliable (Klimisch 1, guideline- and GLP-compliant) studies address the short-term toxicity of terephthalic acid to freshwater invertebrates.   
In the first study (Government of Japan, Ministry of the Environment, 2003b), Daphnia magna were exposed to high purity TPA (free acid), dosed from a stock solution prepared with DMSO, at a concentration intended to approximate to TPA's aqueous solubility limit. No toxicity was observed under these test conditions:
D. magna 48 -h EC50 (semi-static): >20.1 mg TPA/L, 48 -h NOEC: 20.1 mg TPA/L.
These endpoints are mean measured values and represent the maximum limit concentration achievable under the test conditions.
In the second study (Knacker et al., 1993b) TPA was first treated with NaOH solution, to convert the acid to its much more soluble sodium salt(s), and exposure in this study was consequently to sodium terephthalate (following neutralisation of excess alkali). No toxicity was observed under these conditions:
D. magna 48 -h EC50 (static): >967 mg TPA-equiv/L, 96 -h NOEC: 967 mg TPA-equiv/L;
These endpoints are mean measured values and represent the highest concentration applied.
Terephthalic acid and its more environmentally relevant terephthalate sodium salt exhibit very low short-term toxicity to aquatic invertebrates.

Key value for chemical safety assessment

Additional information