[(9-oxo-9H-thioxanthen-2-yl)oxy]acetic acid

Flammability

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

flammable solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

10 Dec 2018 to 16 Jan 2019

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

UN Manual of Tests and Criteria: Test N.1 (Test method for readily combustible solids)

Version / remarks:

2015

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Specific details on test material used for the study:

Appearance: Yellow powder
Purity/Composition: 98.25%
Test item storage: At room temperature protected from light desiccated

Key result

Test procedure:

burning time over 250 mm for metal powders or metal alloys

Remarks on result:

substance does not ignite and propagate combustion either by burning with flame or smouldering along 200 mm of the powder train within the 2 minutes test period

The flame of the gas burner did ignite the test item pile.  The test item melted, burned with a blue yellow flame, emitted yellow sparks and turned into a black residue.  Grey smoke was observed.  After removal of the ignition source, the flame extinguished after 1 second and no propagation of combustion was observed.

Interpretation of results:

not classified based on GHS criteria

Conclusions:

The preliminary screening test was performed for the determination of the flammability of CMTX 2-carboxymethyloxy-thioxanthone.

No propagation of combustion of the test item along 200 mm length of the pile within 2 minutes was observed. According to the guidelines, performance of the burning rate test is not required. Based on the results obtained, the test item is considered ‘not flammable’.

Executive summary:

In this guideline (UN 1) study conducted with GLP certification, the test material (EC 282-803-8) was determined to not be classified as a flammable solid under GHS.

Reference 2

Endpoint:

substances / mixtures which in contact with water emit flammable gases

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

other:

Interpretation of results:

other: ← Complete pick list based on CLP criteria, see below

Reference 3

Endpoint:

pyrophoric solids

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

other:

Reference 4

Endpoint:

self-heating substances / mixtures

Type of information:

experimental study

Adequacy of study:

key study

Study period:

10 Dec 2018 to 16 Jan 2019

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

UN Manual of Tests and Criteria: Test N.4 (Test method for self-heating substances)

Version / remarks:

2015

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Specific details on test material used for the study:

Appearance: Yellow powder
Purity/Composition: 98.25%
Test item storage: At room temperature protected from light desiccated

Key result

Test procedure:

100 mm sample cube at 140°C

Max. temp. reached:

140

Induction time (h):

24

Result:

negative outcome (no effect observed)

The plots of the oven temperature and sample temperature versus time are shown in Figure 6 (attached below).

A negative result was obtained.  No spontaneous ignition occurred and no exothermic effect of the test item was observed.  It demonstrated that the test item is “not a self-heating substance”.  According to the UN guideline, no further testing is required.

After the experiment, the consistency of the sample was unchanged, i.e. no reaction and/or decomposition of the test item was observed.

Interpretation of results:

GHS criteria not met

Conclusions:

Self-heating of CMTX 2-carboxymethyloxy-thioxanthone was determined in accordance with UN Test N.4 “Test Method for Self-heating Substances”.

From the negative result obtained at 140°C using a 10 cm sample cube, it was concluded that CMTX 2-carboxymethyloxy-thioxanthone is not a self-heating substance.

Executive summary:

In this guideline (UN.4) study conducted with GLP certification, the test material (EC 282-803-8) was determined to not be classified as a self-heating substance.

Description of key information

Studies conducted to recognised testing guidelines with GLP certification.

Key value for chemical safety assessment

Flammability:

not classified

Justification for classification or non-classification

Flammable solid test: No propagation of combustion of the test item along 200 mm length of the pile within 2 minutes was observed.  According to the guidelines, performance of the burning rate test is not required.  Based on the results obtained, the test item is considered ‘not flammable’.

Flammability in contact with water: None of the components of the test item does contain groups that might lead to ignition in contact with water and/or to the evolution of a flammable gas.

Pyrophoric solids: None of the components of the test item does contain groups that might lead to ignition in contact with water and/or to the evolution of a flammable gas.

Self-heating: From the negative result obtained at 140°C using a 10 cm sample cube, it was concluded that CMTX 2-carboxymethyloxy-thioxanthone is not a self-heating substance.