Registration Dossier

Ecotoxicological information

Toxicity to terrestrial plants

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

Key value for chemical safety assessment

Additional information

Since no data on the toxicity of C.I. Pigment Yellow 34 or C.I. Pigment Red 104 to terrestrial plants are available.The toxicity of Chromate (CrO42-) and lead ions (Pb²+) that may dissociate from the substance was examined.Both ions are taken up by plants. Baumhardt and Welch (1972) detected uptake and translocation of lead in maize plants but determined no effect on seedling germination and plant growth. In a guideline study comparable to OECD 208 seedling emergence and growth of Avena sativa, Lycopersicon esculentum and Lactuca sativa in presence of chromium were investigated. Lactuca sativa was the most susceptible plant species regarding chromium addition; a NOEC (14 d) of 0.35 mg/kg soil dw was determined for Lettuce. For Avena sativa and Lycopersicon esculentum a NOEC of 3.5 and 3.2 respectively was determined. EC50 (14 d) values for all three plant species ranged from 1.8 - 7.4 mg/kg soil dw (Adema and Henzen 1989). A comparable study was conducted by Pestemer et al. (1987). The study focused on the effect of chromium on seedling emergence and shoot wet weight of several plant species. For Avena sativa an EC50 of 100 mg/kg soil was determined. Thus the EC50 value was appr. 100 times higher compared to the study by Adema and Henzen (1989), however strong reduction of the early growth of Avena sativa was reported by both studies.