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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Additional physico-chemical information

Administrative data

Endpoint:
other: Emission of flammable gases when in contact with water
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2009
Report date:
2009

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: UN Manual of Test and Criteria, Part III, Test N5
Deviations:
no
GLP compliance:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
Cerium
EC Number:
231-154-9
EC Name:
Cerium
Cas Number:
7440-45-1
Molecular formula:
Ce
IUPAC Name:
cerium(3+)
Details on test material:
Sample in massive form, partially covered by a layer of oxidised material.

Results and discussion

Results:
Two samples of 22.2 g were cut off from the massive cerium probe and were brought into de-ionised water at room temperature. The emited gases were measured using an appropriate gas burette. The gas emission was controlled every hour for 24 hours, after which the gas emission stopped.
The overall gas amount collected was 6,9 ml (measured under standard conditions, p = 1013,3 hPa and T=273 K), i.e. a gas development rate of 12,45 ml /Kg sample x hour.

Applicant's summary and conclusion

Conclusions:
The low gas development rate of 12,45 ml /Kg Ce x hour does not suffice to fulfill any of the classification requirements of the division 4.3, ie. packing groups I, II and III. Therefore, cerium metal shall not be considered to emit flammable gases when in contact with water.