Registration Dossier
Registration Dossier
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EC number: 931-275-3 | CAS number: 1125503-33-4
Endpoint summary
Administrative data
Description of key information
Additional information
For HYEQS three terrestrial trophic levels are covered with the available tests
1) AUTOTROPHS (Producer)
Terrestrial plants (Avena sativa – oat, Lactuca sativa – lettuce), OECD 208, chronic test
2) HETEROTROPHS (Consumer)
Earthworm (Eisenia fetida), OECD 207 (acute) & OECD 222 (chronic)
3) DETRITIVORS (Decomposer)
Soil microorganisms, OECD 216 (chronic)
Arthropods like Collembola folsomia (springtails) belong to Heterotrophs which are already covered by the available tests. In addition HYEQS is rapidly biodegraded in soil with a half-life of 6d which ensures low exposure levels in soil. Therefore testing of arthropods were not carried out.
Plants are most sensitive to HYEQS. Chronic toxicity results for plants from an OECD 208 study were derived statistically as EC10 for the most sensitive endpoint growth.
In Table 6.3 the different test results for the terrestrial compartment are given.
Table 6.3 HYEQS Acute and Chronic terrestrial toxicity results
| Acute earthworm | Eisenia fetida | LC50 (14d) | 1000 | mg/kg dw. | OECD 207 |
| Chronic earthworm | Eisenia fetida | NOEC (56d) lowest | 125 | mg/kg dw. | OECD 222 |
| Chronic plant | Avena sativa | NOEC (14d) growth | 6.1 | mg/kg dw. | OECD 208 |
| Chronic plant | Lactuca sativa | NOEC (14d) growth | 10.3 | mg/kg dw. | OECD 208 |
| Chronic soil microorg | NOEC (28d) | 1000 | mg/kg dw. | OECD 216 |
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