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Ecotoxicological information

Toxicity to terrestrial plants

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Administrative data

Link to relevant study record(s)

Description of key information

Key value for chemical safety assessment

Additional information

The information contained within this robust summary document comes from studies which are in the ownership of Arch Chemicals Inc. and which are protected in several regions globally. This information may not be used for any purpose other than in support of the Chemical safety Report submitted by Arch Chemicals Inc. under RegulationEC 1907/2006.

A series of Tier 1 and Tier 2 studies have been conducted on terrestrial plants. The results are summarised inTable55.

 

Table55:Toxicity to plants

Guideline /
Test method

Species

Endpoint /
Type of test

Exposure

Results

[mg/kg dry soil]

Remarks

Reference

design

duration

NOEC

LOEC

EC/LC50

USEPA OPPTS 850.4100

Tomato, Cucumber, Lettuce, Soybean, Cabbage, Carrot, Oat,

Perennial, Ryegrass, Corn, Onion, Sea holly, Sea lavender

Shoot height, shoot weight, root weight & length, and percent emergence

Treated soils 48 hrs with ZPT prior to planting seeds, and watered soil every 2-4 days with ZPT water solution

14-days after emergence

>>0.49 µg/L

ND

ND

Tier I preliminary toxicity study which evaluated ZPT in the soil and in watering solution at a level of ZPT that was determined to be greater than the PEC.

Ward, Wyskiel &

Boeri (2002)

Unpublished study

USEPA OPPTS 850.4225

Rice, Oryzea orysa sative

Tier II Seedling Emergence/percent emergence, plant height, plant weight, root weight & length,

5 concentrations tested in the soil. Test article added to soil 48 hrs prior to adding seeds.

16-days post emergence

100

210

280

 

Ward & Boeri (2003)

Unpublished study

USEPA OPPTS 850.4250

Rice, Oryzea orysa sative

Tier II Vegetative Vigor/plant height, plant weight, root weight & length

5 test concentrations of ZPT were prepared and sprayed onto the plants for 14 days

14-days post emergence

49,000 ppm

88,000 ppm

116,000 ppm

Based on the nature of the ZPT solution, which was milky white, concentrations greater than 49,000 ppm appeared to coat the leaves and blocked any sunlight, most likely resulting in the observation of chlorosis (phytotoxicity). 

Ward & Boeri (2003)

Unpublished study