Prometryn

Oxidising properties

Link to relevant study record(s)

Reference

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

27 Nov 1992 to 25 Jan 1993

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

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

GLP compliance:

yes

Contact with:

powdered cellulose

Sample tested:

reference mixture as specified

Remarks:

barium nitrate/cellulose 60:40

Parameter:

maximum burning rate

Result:

5.4 mm/s

Key result

Sample tested:

test mixture as specified

Remarks:

sample-to-cellulose ratio 1:19

Parameter:

maximum burning rate

Result:

2.3 mm/s

Key result

Sample tested:

test mixture as specified

Remarks:

sample-to-cellulose ratio 1:9

Parameter:

maximum burning rate

Result:

1.9 mm/s

Key result

Sample tested:

test mixture as specified

Remarks:

sample-to-cellulose ratio 1:4

Parameter:

maximum burning rate

Result:

1.4 mm/s

Table 1: Initial test

Mixture (%)		**Burning rate (mm/s)	Reaction
Test subst.	Cellulose
20	80	1.3	Steady burning with flame throughout the whole mass.
40	60	0.7	Steady burning with flame throughout 1/3 of the mass.
60	40	-	Burning does not propagate to second ref.mark. Extinction after 64 min.
80	20	-	Burning does not propagate to second ref.mark. Extinction after 127 min.

** only one test

Table 2: Main test

Mixture (%)		*Max burning rate (mm/s)	Reaction
Test subst.	Cellulose
5	95	2.3	Steady burning with flame throughout the whole mass.
10	90	1.9
20	80	1.4

*Max burning rate: mixture with 5% of product

*Max burning rate test mixture / * Max burning rate reference mixture = 2.3 mm/s /5.4 mm/s = 0.4 mm/s

* in a run of six tests

Interpretation of results:

GHS criteria not met

Conclusions:

The maximum burning rate of the test substance/cellulose mixtures is lower than the maximum burning rate of 5.4 mm/s for the 60 % barium nitrate/cellulose reference mixture. Hence, the test substance is not classified as an oxidising substance.

Executive summary:

To determine the oxidizing properties of the substance a study was performed according to EU Method A.17 and in compliance with GLP. In this study the mean burning times of the maximum burning rate of the test substance/cellulose mixtures is lower than the maximum burning rate of 5.4 mm/s for the 60 % barium nitrate/cellulose reference mixture. Therefore, the test substance is not classified as an oxidising substance.

Description of key information

The maximum burning rate of the test substance/cellulose mixtures was lower compared to the reference mixture, EU Method A.17, Schürch 1993, indicating that the substance should not be considered as an oxidising solid. 

Key value for chemical safety assessment

Oxidising properties:

non oxidising

Justification for classification or non-classification

Based on the available information, classification on oxidising properties is not warranted in accordance with EU Classification, Labelling and Packaging of Substances and Mixtures (CLP) Regulation No. (EC) 1272/2008.