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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
4 µg/L
Assessment factor:
10
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
1.4 µg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.4 µg/L
Assessment factor:
100
Extrapolation method:
assessment factor

STP

Hazard assessment conclusion:
PNEC STP
PNEC value:
190 µg/L
Assessment factor:
100
Extrapolation method:
assessment factor

Sediment (freshwater)

Hazard assessment conclusion:
PNEC sediment (freshwater)
PNEC value:
4.8 mg/kg sediment dw
Extrapolation method:
equilibrium partitioning method

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.48 mg/kg sediment dw
Extrapolation method:
equilibrium partitioning method

Hazard for air

Air

Hazard assessment conclusion:
no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
PNEC soil
PNEC value:
0.61 mg/kg soil dw
Assessment factor:
10
Extrapolation method:
assessment factor

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
PNEC oral
PNEC value:
16.7 mg/kg food
Assessment factor:
90

Additional information

Based on the available data for the aquatic compartment HYEQS is most toxic to algae with an acute ErC50 (72h) of 0.14 mg/L and a chronic ErC10 (72h) of 0.04 mg/L.

Based on the available data for the terrestrial compartment HYEQS is most toxic to plants (Avena sativa (oat) & Lactuca sativa (lettuce)) with a lowest chronic EC10 (14d) growth of 6.1 mg/kg soil dw for Avena sativa.

Conclusion on classification

For the Environmental classification the following data of HYEQS have to be considered:

1. Acute ecotoxicity (lowest available value):   Algae ErC50 (72h) = 0.14 mg/L

2. Chronic ecotoxicity (lowest available value): Algae ErC10 (72h) = 0.04 mg/L

3. Ready biodegradability

4. Log Kow = 2.3 (not bioaccumulative)

Based on these parameter the proposed classification is a follows

Proposed classification according DSD 67/548/EEC:

N, R50                                  Algae ErC50 (72h) < 1 mg/L
                                              readily biodegradable, Log Kow < 3 (no long-term classification)

Proposed classification according CLP 2ndATP 2011/286/EEC

Acute (short-term) aquatic hazard:    Acute Category 1   
readily biodegradable, ErC50 (72h) is < 1 mg/L), M=1

Long-term (chronic) aquatic hazard:   Chronic Category 2
readily biodegradable, ErC10 (72h) is >0.01 but <= 0.1 mg/L, M = - 

The M factors given before are based on the rules given in Section 4.1.3.5.5.5, in 2ndATP of CLP Regulation 2011/286/EEC for assigning of M factors.