Reaction mass of diiron carbide, diiron phosphide and triiron phosphide

Oxidising properties

Link to relevant study record(s)

Reference

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2011-11-11 to 2011-11-24

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Reason / purpose for cross-reference:

reference to same study

Qualifier:

according to guideline

Guideline:

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

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Remarks:

signed 2011-05-17

Specific details on test material used for the study:

Appearance: solid
Storage conditions: room temperature

Contact with:

powdered cellulose

Sample tested:

reference mixture as specified

Remarks:

3 parts barium nitrate /2 parts cellulose

Parameter:

preliminary test

Result:

25 s

Remarks on result:

other: Reference burned vigorously to completion in 25 seconds.

Sample tested:

test mixture as specified

Remarks:

2:1, 1:1, 1:2

Parameter:

maximum burning rate

Result:

343 - 510 s

Remarks on result:

other: As all test substance / cellulose mixtures burned significantly more slowly than the reference mixture, Fe3P is considered to be non-oxidising.

Test material burned to completion in 510 seconds in a 2:1 mix with cellulose, 486 seconds in a 1:1 mix, and 343 seconds in a 1:2 mix with cellulose. In each case, the mixture burned very slowly to completion with a gentle blue / yello flame and incandescence.

Interpretation of results:

GHS criteria not met

Conclusions:

Fe3P was found to be non-oxidising.

Description of key information

Fe3P was found not to be oxidising.

Key value for chemical safety assessment

Oxidising properties:

non oxidising

Additional information

A determination of oxidising properties was performed as part of a package of Physicochemical testing (Huntingdon Life Sciences, 2011, Study FGE0016). The oxidising properties determination was performed according to EC Method A17, and the study was conducted in compliance with GLP.

Dried test substance was mixed with powdered cellulose in a ratio of 2:1, and formed into a cone on a non-porous, non-flammable surface, and ignited with a gas burner, and the rate of burning recorded. The test was repeated with test material: cellulose in ratios of 1:1 and 1:2, and with a reference mixture of barium nitrate to cellulose 3:2. All three test material mixtures were found to burn very slowly to completion; each mixture burned more slowly than the reference mixture.

As all test substance/cellulose mixtures burned significantly more slowly than the reference mixture, Fe3P is considered to be non-oxidising.

Justification for classification or non-classification

When mixed with a combustible material (cellulose), Fe3P was found to burn less rapidly than a reference mixture of an oxidising material and cellulose, and therefore was concluded not to display oxidising properties. On this basis, Fe3P does not meet the criteria for classification as an Oxidising Solid under the CLP Regulation (Regulation (EC) 1272/2008). Similarly, Fe3P is not classified as an oxidiser according to the Dangerous Substances Directive (Directive 67/548/EEC).