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Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Additional information

Reaction mass of 2,6-di-tert-butyl-p-cresol, 4,6-di-tert-butyl-o-cresol and 2,6-di-tert-butylphenol componentsdo not have harmonized classifications in accordance with the CLP Regulation. 

 In accordance with the GHS criteria for classification of substances for acute aquatic toxicity, Acute aquatic toxicity threshold values are as follows: 

 

·                   96-hr LC50 (for fish) ≤ 1 mg/l and/or

·                   48 hr EC50 (for crustacea) ≤ 1 mg/l and/or

·                   72 or 96 hr ErC50 (for algae or other aquatic plants) ≤ 1 mg/l.

 

Classification for chronic aquatic toxicity will be relevant for substances with chronic toxicity

values (NOEC) ≤ 1 mg/l.

 

Reaction mass of 2,6-di-tert-butyl-p-cresol, 4,6-di-tert-butyl-o-cresol and 2,6-di-tert-butylphenol componentsare not considered to degrade fast in the environment.The BCF/BAF values estimated forReaction mass of 2,6-di-tert-butyl-p-cresol, 4,6-di-tert-butyl-o-cresol and 2,6-di-tert-butylphenol componentsare above the cut-off values for bioaccumulation (<500 L/kg wet-w) suggesting thatReaction mass of 2,6-di-tert-butyl-p-cresol, 4,6-di-tert-butyl-o-cresol and 2,6-di-tert-butylphenol componentsmay have some potential for bioaccumulation.

 

The ecotoxicity data onReaction mass of 2,6-di-tert-butyl-p-cresol, 4,6-di-tert-butyl-o-cresol and 2,6-di-tert-butylphenol componentsare summarised as follows:

·                   Acute toxicity: LC50(EC50) <1 mg/L (estimated);

·                   Chronic toxicity: NOEC <1 mg/L (estimated).

 

This corresponds toAcute and Chronic Category 1 toxicity classification (M=10) forReaction mass of 2,6-di-tert-butyl-p-cresol, 4,6-di-tert-butyl-o-cresol and 2,6-di-tert-butylphenol.