Registration Dossier

Administrative data

Endpoint:
relative self-ignition temperature (solids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
15 - 16 Nov 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2018
Report date:
2018

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
EU Method A.16 (Relative Self-Ignition Temperature for Solids)
GLP compliance:
yes (incl. QA statement)
Remarks:
Rheinland-Pfalz Landesamt für Umwelt, Mainz, Germany

Test material

Results and discussion

Relative self-ignition temperature (solids)
Remarks on result:
no self ignition observed under the test conditions
Remarks:
no self-ignition up to 400 °C

Any other information on results incl. tables

Findings
Weight of empty cube: 3.7641 g
Weight of cube + test item: 8.8888 g

 

Temperature data
The temperatures which were measured in the experiment are presented in the following table. As many values were recorded, only the values every 60 minutes and relevant values (until the oven had reached the chosen temperature) are presented.

 

Time [min]

Temperature (test item) [°C]

Temperature (oven) [°C]

0005 Start

21.5

19.3

0060

35.0

46.0

0120

60.6

80.7

0180

90.2

115.2

0240

118.7

152.3

0300

144.4

188.5

0360

169.7

223.5

0420

204.5

258.3

0480

288.0

294.0

0485

378.1

297.2

0490

325.5

300.6

0495

280.4

303.4

0540

285.4

328.5

0600

319.1

362.6

0600

355.2

397.7

0665 End

358.1

400.4

 

After performance of the test, the test item was black and charred.

 

Determination of heating rate
The heating rate was calculated using the following equation:
heating rate = (T2 – T1)/(t2 – t1)

T1 = temperature after 5 minutes in °C

T2 = End temperature in °C

t1 = 5 min

t2 = time at which the end temperature was reached in min

 

Presentation of result heating rate

T1 [°C]

19.3

t1 [min]

5

T2 [°C]

400.4

t2[min]

665

Heating rate [°C/min]

0.5774

 

Results and Discussion

An increase in the temperature of the sample in comparison to that of the oven was detected; also signs of ignition were observed. But the increase was below 400 °C.

Therefore, the test item Reaction mass of potassium sodium phosphotartrate and potassium sodium tartrate and potassium sodium ortho-phosphate (solid substance) is considered asshowing no self-ignition up to 400 °Cunder the test conditions.

No observations were made which might cause doubts concerning the validity of the study outcome.

 

Deviations
Deviations from the Study plan
No deviation from the study plan was ascertained.

Deviations from the Guideline
The following deviation from the guideline was documented:

The heating rate slightly deviated from the value stated in the guideline of 0.5 °C/min

(0.58 °C/min). This is considered as uncritical as a nominal heating rate of 0.5 °C/min was adjusted at the instrument and only a minimal deviation was observed.

Applicant's summary and conclusion