1,5,10-trimethylcyclododeca-1,5,9-triene, epoxidised

Endpoint summary

Description of key information

Physico-chemical properties of the registered substance were determined from experimental testing. Some endpoints were waived, based on chemical structure of the known constituents (mainly composed of mono and dieposidised isomers) and experience in use.

The substance is a pale yellow liquid at ambient temperature, with low volatility.

In water, it is slightly soluble, and slightly less dense, so expected to floate. Despite the standardised EU.A5 test shows surface-active potential under the experimental conditions, it is not considered as a true surfactant, due to the chemical structure of the substance and non-intended use.

It has potential for bioaccumulation.

It is NOT classified as hazardous with regard to physical hazards (flammability, explosivity, oxidising properties and organic peroxide) based on CLP and GHS criteria.

Additional information

Summary of relevant physico-chemical properties:

Endpoint (method)	Data
Appearance (visual)	Colourless to Pale Yellow liquid at 20 °C and 1 atm.
Freezing point (OECD 102/EU A1/BS4633, crystallizing point)	< -20 ± 0.5 °C (<253 ± 0.5 K)
Boiling point (OECD 103/EU A2,  Siwoloboff)	305 ± 2 °C (578 ± 2 K) at 97.4 kPa.
Relative density (OECD 109/EU A3, Oscillating densitymeter)	0.974 at 20 +/-0.5°C
Granulometry (data waiving based on physical state)	not applicable (liquid)
Vapour pressure (OECD 104/EU A4, dynamic method)	0.161 Pa at 20°C (extrapolation)
Log Kow (OECD 117, HPLC)	log Kow = 5.05 at 30°C (column temperature)
Water solubility (OECD 105 modified with slow-stirring)	20.7 mg/L at 20 +/-0.5°C (pH=6.6 -7.0) in ultra pure water 23.16mg/L at 20 +/-0.5°C (pH=7.8 - 8.0) in daphnia medium
Surface tension (OECD 115/EU A5, ring method)	51.5 mN/m at 21.5°C± 0.5 °C (using a 90% aqueous solution obtained with a loading rate of 1g/L slowly mixed for 72h)*
Auto-ignition temperature (EU A15/DIN EN 14522:2005)	Auto-ignition temperature = 251 °C.
Flash-point (EU A9, ISO 3679, equilibrium closed cup) Flammability water & air (data waiving)   Self-heating (data waiving)	143°C NOT classified as a flammable liquid according to CLP and GHS criteria.  No Flammable properties if contact with air or water anticipated.  Waiving based on chemical structure of known constituents and on experience in handling and use No self-heating substance anticipated.  Waiving based on physical state
Explosive properties (data waiving)	No potential for explosive properties. Waiving based on chemical structure of known constituents
Oxidising properties (data waiving)	No potential for oxidizing properties.  Waiving based on chemical structure of known constituents
Organic peroxide (data waiving)	Not an organic peroxide.  Waiving based on chemical structure of known constituents

* As the result is below the threshold value of 60mN/m and even if the equilibrium may be not reached, the substance is expected to have surface active potential under the experimental conditions based on EUA5 criteria.

However considering that the structure of the known constituents of the substance are not characteristic of true surfactants and that it is not the intended use of the substance (i.e. not a desired property), this conclusion should be taken with caution.

Slight variations are possible with composition (UVCB substance).