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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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

60oC, Type G

Reliability rating: Klimisch 1

Testing in accordance with Division 4.1 (self-reactive substances) the prescribed tests according to the flow-chart scheme for self-reactive substances (UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, CT/SG/AC.10/11/Rev. 5, 2009, section 20, fig. 20.1 a/b.

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.