Registration Dossier

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

Value used for CSA

Discussion

Physical state at 20°C and 1013 hPa

The substance, as manufactured, is a dark red liquid.

Reliability rating: Klimisch 1

The study was performed in accordance with the relevant guideline but not to GLP; however this was considered not to have affected the result.

Melting / freezing point

4.8 - 8.3 °C

Reliability rating: Klimisch 2

The study was conducted to OECD guideline 102, although not to GLP.

Boiling point

Decomposes before reaching the boiling point (onset temperature ca. 139°C).

Reliability rating: Klimisch 2

The study was conducted to OECD guideline 103, using differential scanning calorimetry.

Density

1.035 at 20°C

Reliability rating: Klimisch 2

The in-house study was conducted to OECD guideline 109, although not to GLP.

Particle Size

Waived

Substance manufactured and marketed as a liquid.

Vapour pressure

2.254 Pa at 25°C

Reliability rating: Klimisch 1

The vapour pressure of a sample of 4 -Oxo-Tempo (purity 93.79% w/w) was determined in a study performed in accordance with OECD 104 and EU Method A4 and to GLP.

Partition coefficient n-octanol/water (log value)

0.28 at 22°C, pH 7.

Reliability rating: Klimisch 2

The octanol: water partition coefficient of a sample of 4-Oxo Tempo was determined in an in-house study, conducted to OECD guideline 107, although not to GLP.

Water Solubility

216 g/L at 20°C

Reliability rating: Klimisch 2

An in-house study was conducted according to OECD 105.

Surface tension

Waived

Not a desired property of the substance, therefore testing not required.

Flash point

>85°C

Reliability rating: Klimisch 2

An in-house study was conducted according to EU method A9.

Auto-Flammability

Susceptible to undergo a violent thermal decomposition when heated adiabatically. Onset temperature approximately 84°C.

Reliability rating: Klimisch 2

Safety testing demonstrates

conclusively the potential of the substance to violently decompose.

Classification as ‘Self Reacting substance: Type F’ required.

Flammability

Not flammable

Based on flash point data.

Explosiveness

Not explosive

Reliability rating: Klimisch1

Testing in accordance with EU Method A.14 demonstrates

conclusively the substance is not explosive.

Oxidising properties

Not oxidising

Reliability rating: Klimisch 1

Testing in accordance with EU Method A.14 demonstrates conclusively the substance is not oxidising.

Stability in organic solvents and identity of relevant degradation products

Stable at 30%w/w in methanol and ethyl benzene for at least 36 days (dark, 22±2 °C)

Reliability rating: Klimisch 1

No guideline available – performed in accordance with ECHA Guidance on Information Requirements and Chemical Safety Assessment Chapter 7a, 7.1.16, May 2008.

Dissociation constant

Waived

No ionisable functionality.

Viscosity

35.4 Centipoise (mPa.s)

Reliability rating: Klimisch 2

Non-GLP, in-house study performed in accordance with OECD 114.