1. ECETOC TRA tool
Proposed application to estimate PEC/PNEC ratio for substances with risk score = 1
ECETOC has developed a tiered approach for calculating the exposure and related risks to consumers, workers and the environment caused by chemicals:
Tier 1: based on pre-defined and conservative use scenarios corresponding to Environmental Release Categories (ERC) described under REACH Guidance (Chapter R.16)
Tier 2: detailed risk assessment on previously identified uses (additional more realistic exposure input)
Developed in Excel, contains the user interface and the datasheets
Freely downloadable after registration from:

2. Substance input interface
ECETOC TRA tool
Options for retrieval and storage of information from and to the database
Substance input interface 2

3. ECETOC TRA tool Input to Environment Assessment
Use scenarios definition
Reference values (e.g. PNEC) entry 3

4. ECETOC TRA tool Environment Assessment Output interface
PEC and risk ratio (PEC/PNEC) derivation

5. Example of application
ECETOC TRA tool
Example of application
Input data
Name of the substance = Galaxolide
CAS Number =
Sector of use (SU) = Private houdeholds (from IUCLID db: personal and domestic use as cosmetics, odour agents and detergents)
Molecular weight = 258,40642 mol/g
Vapour pressure = 7,27E-02 Pa
Water solubility = 4,86E-07 mg/L
Partition coefficient octanol-water (log) = 5,86E+00
Biodegradability test result = not biodegradable
Life cycle stage = service life
ERC = ERC10b, i.e. wide dispersive outdoor use of long-life articles and materials with high or intended release (from IUCLID db: wide dispersive use)

6. Example of application
ECETOC TRA tool
Example of application
Output data
PEC local freshwater = 3,00E-01 mg/L
PEC local freshwater sediment = 7,64E+01 mg/Kg(wwt)
PEC local marine environment = 2,98E-02 mg/L
PEC marine sediment = 7,58E+00 mg/Kg(wwt)
PEC in STP = 2,74E+00 mg/L
Total daily intake man via the environment local = 9,42E+00 mg/Kg(dw)/d
RCR local freshwater = 8.19E+02

7. ERC under REACH

8. ERC under REACH
ERC is selected according to the most realistic worst case scenario for the substance of concern