Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
94.9 µg/L
Assessment factor:
1 000
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
949 µg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
9.49 µg/L
Assessment factor:
10 000
Extrapolation method:
assessment factor

STP

Hazard assessment conclusion:
PNEC STP
PNEC value:
10 000 µg/L
Assessment factor:
10
Extrapolation method:
assessment factor

Sediment (freshwater)

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

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.056 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:
0.056 mg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

In ecotoxicity studies hexanoic acid, 3,5,5-trimethyl-, tin (2+)salt (2:1) proved to be readily biodegradable, the lowest obtained acute EC/LC50 value is the 72-h-ErC50 of 94.9 mg/L for algae.

Short-term toxicity to aquatic organisms:

Fish: LC50 (96 h) = > 100 mg/L for Danio rerio (OECD 203)

Invertebrates: EC50 (48h) = > 100 mg/L for Daphnia magna (OECD 202)

Algae and cyanobacteria: ErC50 (0-72 h) = 94.9 mg/L for Desmodesmus subspicatus (OECD 201)

 

Biodegradation in water: readily biodegradable (OECD 301F) (10-d-w maintained, 87% biodegradation after 28 d)

Bioaccumulation:  Based on the log Kow = 2.83 at pH 2.8 and the corresponding log Kow (log D) = 0.65 at pH 7 of the organic dissociation product of the ionic substance, the substance will have a low potential for bioaccumulation in aquatic organisms and a low potential for adsorption to organic matter of soils and sediments at environmental relevant pH values.

Based on the available information, there is no indication of a bioaccumulation potential in organisms and, hence, secondary poisoning is not considered relevant. 

Hexanoic acid, 3,5,5-trimethyl-, tin (2+)salt (2:1) is not classified with regard to environmental effects.

 

Conclusion on classification

Aquatic environment classification

The test substance proved to be readily biodegradable (87% biodegradation after 28 d)

The lowest acute EC/LC50 value in aquatic tests is the EC50=94.9 mg/L for algae.

Due to the fact that the test substance has proven to be readily biodegradable and has a low log Kow (0.65) at pH 7, the substance has not to be classified as dangerous/hazardous to the environment according to Directive 67/548/EEC and according to the Regulation (EC) 1272/2008 on classification, labelling and packaging of substances and mixtures (CLP Regulation)

Lowest reliable EC/LC50 value: 94.9 mg/L

Ready biodegradable: yes

log Kow: <3

Special concern: no

According to 67/548/EEC, Annex 1: not classified

According to CLP regulation 1272/2008 (including 1st-3rd ATP) : Hazardous to the environment: not classified, no hazard statement.

Based on the available data, the substance can not be considered as a PBT substance.