Dilanthanum tricarbonate

Oxidising properties

Link to relevant study record(s)

Reference

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

26 Jul - 01 Aug 2005

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP-Guideline study

Reason / purpose for cross-reference:

reference to same study

Qualifier:

according to guideline

Guideline:

EU Method A.17 (Oxidising Properties (Solids))

Deviations:

yes

Remarks:

Ignition source: use of a platinum wire heated by electrical power instead of a direct flame. This modification has no effect on the conclusion.

GLP compliance:

yes

Sample tested:

reference mixture as specified

Remarks:

Barium nitrate/cellulose (2:1)

Parameter:

preliminary test

Result:

89 s

Sample tested:

test mixture as specified

Remarks:

test item /Cellulose (2:1)

Parameter:

preliminary test

Remarks on result:

other: combustion of substance mixture stopped immediately

Sample tested:

test mixture as specified

Remarks:

mixtures specified in 'any other information on results incl. tables'

Parameter:

burning time of reaction over a distance of 200 mm

Remarks on result:

other: ignition by the hot wire but no flame propagation

Preliminary test:

Reference mixture (barium nitrate / cellulose - ratio 2/1) took 89 seconds to burn.

The combustion of the substance mixture (test item / cellulose - ratio 2/1) stopped immediately.

Main study:

 

Nominal proportion of test item (%)	Weight of cellulose (g)	Weight of Test item (g)	Burning time (s)	Remarks
10	13.528	1.480	Ignition by the hot wire, but no flame propagation
20	12.036	2.973	"
30	10.482	4.460	"
40	8.960	5.997	"
50	7.548	7.530	"
60	6.019	8.974	"
70	4.487	10.546	"
80	3.013	12.005	"
90	1.503	13.508	"

The test item did not burn.

Lanthanum carbonate has no oxidising properties under the conditions of the test.

 

Description of key information

no oxidising properties

Key value for chemical safety assessment

Oxidising properties:

non oxidising

Additional information

The determination of the oxidising properties of Lanthanum carbonate was performed according to EU Method A17 using a powder train about 250 mm long (Cerutti 2005). The test item was mixed with a combustible substance, being powdered cellulose. The test item / cellulose mixtures contained 10 - 90% test item in 10% increment by weight. As a reference, a barium nitrate / cellulose mixture was prepared. A pile of each mixture is ignited with the hot wire, and the burning time is recorded.

No flame propagation was observed with each mixture of test item and cellulose.

Therefore, Lanthanum carbonate has no oxidizing properties.

Justification for classification or non-classification

The available data on oxidising properties of the test substance do not meet the criteria for classification according to Regulation (EC) 1272/2008, and are therefore conclusive but not sufficient for classification:

No flame propagation was observed with each mixture of test item and cellulose.

Therefore, Lanthanum carbonate has no oxidizing properties.