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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

The adsorption/desorption of TOPP as a whole substance is not scientifically necessary or meaningful for the purpose of environmental exposure assessment. It is necessary to consider the adsorption properties of the individual constituents of TOPP. As a consequence, in this section, only data describing the adsorption/desorption of TOPP constituents are considered.

Additional information

The distribution in a waste water treatment plant for the constituent blocks of TOPP has been estimated using the SimpleTreat model (implemented in EUSES 2.1.2) based on the physicochemical and biodegradation properties, see the table below. These distributions are also indicative of the distribution in the wider environment.

The estimated distribution for each TOPP block is shown in Table 4.2.3.

Table 4.2.3: Distribution modelling in STP

Block number

Release (%) directed to water

Release (%) directed to air

Release (%) directed to sludge

Release (%) degraded

1

3.541

59.82

7.968

28.66

2

3.52

60.01

7.967

28.50

3

3.469

59.84

8.661

28.02

4

9.228

16.99

0.203

73.57

5

15.53

46.67

0.046

37.74

6

5.366

16.50

77.30

0.819

7

11.99

1.635

1.204

85.16

8

5.731

86.21

8.058

0

9

54.53

45.02

0.441

0