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Diss Factsheets

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

For the physico-chemical studies three representative charcoal probes with different carbon content were chosen:

Probe 1: C-Fix = 73.3%, Probe 2: C-Fix = 80.5%, and Probe 3: C-Fix = 88.7%.

The results of the physico-chemical studies are summarized in Table 1. The respective robust study summaries and endpoint summaries are given in IUCLID sections 4.1-4.22.


Table 1 Overview of physico-chemical data of charcoal

IUCLID section




Probe 1

Probe 2

Probe 3


Appearance / physical state / colour

black, porous solid


Melting point / freezing point

could not be determined under the experimental conditions (≤1095 °C)


Boiling point

Study was waived1


Relative density


Fraction ≤25 µm


Fraction ≤25 µm


Fraction ≤25 µm


Particle size distribution (granulometry)

< 100 µm: 0.53% to 0.87%

<10 µm: 0.05% to 0.29%


Vapour pressure

Study was waived2


Partition coefficient

<0.3 – 1.474 (at 25°C and pH 5.5)


Water solubility

<1 mg/L


4.6 mg/L

(22.4 °C)

<1 mg/L



Surface tension

Study was waived3


Flash point

Study was waived4


Auto flammability











Oxidising properties

Not oxidising



Study was waived5



1 Determination of the boiling point is not needed in accordance with REACh Regulation (EC) No. 1907/2006, Annex VII, 7.3., column 2 as the test substance is a solid which melts above 300°C. In a melting point study with charcoal, no melting was observed up to 1,000°C, only ashing/burning (see IUCLID section 4.2).

2 Determination of the vapour pressure is not needed in accordance with REACh Regulation (EC) No. 1907/2006, Annex VII, 7.5., column 2, as the melting point of the test substance was >300°C.

3 The surface tension study is not needed in accordance with REACh Regulation (EC) No. 1907/2006, Annex VII, 7.6., column 2, as surface tension is generally a property of liquids and charcoal is highly insoluble in water. Please, see IUCLID section 4.8 for the results of the water solubility study.

4 The flash point is a property of liquids and is not applied to solids. Since charcoal is solid, information on flash-point is not required (see chapter 7A, section R.7.1.9, pp115 of the ECHA guidance document on information requirements for the CSR). In addition, according to GC-MS results from charcoal as such and an organic extract of charcoal only traces of some volatile organic compounds were detectable at room temperature (see IUCLID section 1.4: Analytical information: GC-MS screening of charcoal extracts).

5 Viscosity is relevant only to liquids. Therefore, for charcoal (melting point >1000°C) this determination is not required (according to guidance R.7A).

Based on the results of the flammability, explosiveness and oxidising properties charcoal was not classified as being flammable, explosive or oxidising as described in the current EU-CLP regulation.

The test method A.16 (EC) No 440/2008 “self-ignition temperature” checks for self-heating properties. Although charcoal is auto-flammable under the conditions of the test, the result does not lead to a classification as self-heating substance, because the test is generally inappropriate for a sound assessment according to REACh “guidance on the application of CLP” p.145. Further testing is required for assessment.