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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Auto flammability

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Administrative data

Link to relevant study record(s)

Description of key information

The relative self-ignition temperature for solids is the minimum temperature at which a certain volume of a substance will ignite under defined conditions. The self-ignition temperature of a substance can be used to assess situations in which a substance can spontaneously catch fire. (Guidance on information requirements and chemical safety assessment - Chapter R.7a: Endpoint specific guidance)
According to column 2 of Annex VII (standard information requirements for substances manufactured or imported in quantities of 1 tonne or more) of Regulation (EC) No 1907/2006 the study does not need to be conducted if preliminary results exclude self heating of the substance up to 400 °C.
Sulphuric acid, compound with graphite is an inorganic solid, consisting of natural graphite and variable amounts of intercalated sulphuric acid. The substance decomposes when being heated above 180°C. Depending on the intercalation grade the sulphuric acid starts to volatize between 160 °C and 250 °C.
Against this background, self-heating of the substance can be excluded up to 400 °C and performance of a study to determine the auto flammability is not required under Regulation (EC) No 1907/2006 (REACH).

Key value for chemical safety assessment

Additional information