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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Toxicity to terrestrial plants

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

Effects on terrestrial plants were investigated in an OECD guideline 208 study. The identified most sensitive endpoint was growth (shoot fresh mass) for turnip (EC50) and tomato (EC10). 

Key value for chemical safety assessment

Short-term EC50 or LC50 for terrestrial plants:
28.5 mg/kg soil dw
Long-term EC10, LC10 or NOEC for terrestrial plants:
1.69 mg/kg soil dw

Additional information

Some publications report effects of Benzotriazole on the growth of terrestrial higher plants.

Wu et al. have conducted a series of test with different plants (Pumpkins, Alfalfa, Cottonwood, Corkscrew willow, horseraddish) indicating toxic effects of Benzotriazole on the growth of plants (Wu et al., 1998). In addition, findings in tomato plants (Davis, 1954), cucumber seedlings and bushbean plants (EPA report 1977) have been reported.

Lupher et al. investigated inhibition effects on sunflowers and fescue indicating significant effects at concentrations of 0.1 mg/mL of the test substance (Lupher, 1999). This value is not comparable to the actual guideline study. The tested sunflowers showed their lowest EC10 for seedling emergence at 2.69 mg/kg soil dw.

Davis D (1954) Benzotriazole, a plant-growth regulator, Science, 120:989.

Lupher D, Davis LC, Erickson LE (1999) Effect of Benzotriazoles on sunflowers and fescue. Proceedings of the 1999 Conference on Hazardous Waste Research

Wu X, Chou N, Lupher D, & Davis LC (1998). Benzotriazoles: toxicity and degradation.Conference on Hazardous Waste Research(pp. 374–382).