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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Endpoint summary

Administrative data

Description of key information

Additional information

All available short-term studies on sodium benzotriazole and read across substances have shown effect concentrations > 8.5 mg/L (D. galeata exposed to 5 -methyl-1H-benzotriazole) indicating an overall low acute toxicity towards aquatic organisms. Lowest available long-term effect values has been found in studies with Daphnia galeata (EC10(21d) =0.97 mg/L (1H-Benzotriazole), EC10(21d) =0.4 mg/L (5 -methyl-1H-benzotriazole)), Desmodesmus subspicatus

(EC10(72h) =1.18 mg/L (1H-Benzotriazole), EC10(72h) =2.86 mg/L (5 -methyl-1H-benzotriazole)), and Lemna minor

(EC10(7d) =3.94 mg/L (1H-Benzotriazole), EC10(7d) =2.11 mg/L (5 -methyl-1H-benzotriazole)) indicating a moderate toxicity to aquatic organisms.

Several studies on toxicological effects in different fish species are available indicating moderate toxicity towards fishes.

The most sensitive LC50 in freshwater species (Rainbow trout; Oncorhynchus mykiss) derived for sodium benzotriazole was 14.84 mg/L (expressed as active ingredient). The most sensitive value for sodium benzotriazole in a saltwater study with Inland Silversides was a 96 hour LC50 of 30.75 mg/L (expressed as active ingredient).

Therefore, no further testing on long-term effects in fish has been proposed. Furthermore results from testing on microorganism indicate a low hazard to STPs only. Based on the results from the chronic studies with D. galeata 1H-Benzotriazole, Tolyltriazole as well as their conjugated sodium salts are classified as hazardous to the aquatic environment category Chronic 2 according Regulation (EC) No 1272/2008.