Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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


Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

Cerium metal is a flammable solid according to an equivalent test guideline to EU A10 "flammability for solids".

Key value for chemical safety assessment


Additional information

ECHA guidance R.7.a, page 120: "A flammable solid is one that is readily combustible. A readily combustible solid is a powdered, granular or pasty substance that can be easily ignited by brief contact with an ignition source and the flame spreads rapidly."

According to the Regulation EC 1272/2008, metals whose burning rate is higher than 2,2 mm /s, and when the zone of reaction spreads over the whole length of the sample in less than 5 minutes shall be classified as flammable solid category 1.

Justification for classification or non-classification

Burning rate: 1,4 cm / min = 0,23 mm / s

Cerium (solid) is classified as category 4.1, packing category II, according to the UN Manual of Test and Criteria since the time of burning in accordance with the test method described in of the UN Manual of Test and Criteria (4th revised edition).

According to CLP cerium metal shall therefore be classified as "flammable solid, cat. 1" with hazard statement "H228 Flammable solid".