Pirimiphos-methyl

Oxidising properties

Link to relevant study record(s)

Reference

Endpoint:

oxidising liquids

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

UN Manual of Tests and Criteria: Test O.1 (Test for oxidizing solids)

GLP compliance:

yes

Specific details on test material used for the study:

- Batch: ASJ10084-01S
- Purity: 93.5 % w/w
- Storage conditions: 5 °C

Contact with:

powdered cellulose

Duration of test (contact time):

60 s

Sample tested:

reference mixture with 65% nitric acid + cellulose (1:1 ratio)

Parameter:

mean pressure rise time

Result:

4.3 s

Sample tested:

test mixture 1:1

Parameter:

mean pressure rise time

Remarks on result:

not determinable

Remarks:

no measurable rise time

In the five tests the test mixture either failed to create a sufficient pressure increase to enable the rise time to be measured or produced rise times that were well above the 4.3 s average for the 1:1 65 % aqueous nitric acid/cellulose reference mixture. The perchloric acid/cellulose and sodium chlorate/cellulose mixtures were not required. The test substance is not classified as an oxidising substance.

Table 1: Oxidising Properties Results

Cellulose mixture	Rise time (s) (100 psi - 300 psi)	Comments
65% aqueous nitric acid	4	Mean rise time 4.3 s
	3.7
	4.2
	4.5
	4.9
Test substance	32.8
	27.3
	Not determined *	Max. pressure after 59.5 s = 184 psi
	Not determined *	Max. pressure after 54 s = 281 psi
	Not determined *	Max. pressure after 60 s = 297 psi

*  Not Determined = 300 psi not reached hence no measurable rise time

Interpretation of results:

GHS criteria not met

Conclusions:

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 UN Test O.2 and in compliance with GLP. In five tests, the mixture of substance with dried cellulose (1:1) failed to create a sufficient pressure increase to enable the rise time to be measured or produced rise times exceeding the 4.3 second average for the 1:1 reference mixture of 65 % aqueous nitric acid/cellulose. Hence, the test substance is not classified as an oxidising substance.

Description of key information

The test substance is not an oxidising substance, UN Manual of Tests and Criteria: Test O.2, Husband 1998.

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.