Phosphoric acid C12-alkyl and C18-alkyl esters, potassium salts

Stability: thermal, sunlight, metals

Link to relevant study record(s)

Reference

Endpoint:

thermal stability

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2018-02-19 to 2018-03-21

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 113 (Screening Test for Thermal Stability and Stability in Air)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test substance thermally stable:

yes

Test substance stable to sunlight:

not determined

Test substance stable to metals / metal ions:

not determined

In the temperature range of 30 – 80 °C a small endothermic effect was observed. In the temperature ranges of 120 – 170 °C, 190 – 250 °C and 310 – 330 °C three small exothermic effects was observed, with an overall decomposition energy of approx. -20 J/g. At approx. 420 °C the pressure in the crucibles started to increase.

Results of the DSC-measurements

No.	Sample weight / mg	Start of effect / °C	Energy / J/g	Remark
PN14975	9.47	30 120 190 310	20 (endothermic) -10 (exothermic) -30 (exothermic) <-10 (exothermic)	Figure 4
PN14976	7.98	30 130 190 310	30 (endothermic) <-10 (exothermic) -40 (exothermic) <-10 (exothermic)	Figure 5

 

In the DSC-measurements the overall energy of the exothermic effects of the test item in closed glass crucibles was approx. -50 J/g.

Conclusions:

The substance is thermal stable at ambient conditions.

Executive summary:

A study was conducted according to OECD TG 133 to determine the thermal stability of the test item using DSC measurement. The test item was weighed in under an inert atmosphere (nitrogen) into the glass crucible. In the temperature range of 30 – 80 °C a small endothermic effect was observed. In the temperature ranges of 120 – 170 °C, 190 – 250 °C and 310 – 330 °C three small exothermic effects was observed, with an overall decomposition energy of approx. -20 J/g. At approx. 420 °C the pressure in the crucibles started to increase. In the DSC-measurements the overall energy of the exothermic effects of the test item in closed glass crucibles was approx. -50 J/g.According to the OECD guideline 113 criteria the test item was considered to be thermal stable at room temperature as no decomposition or chemical transformation was found below 150°C.

Description of key information

The substance is thermal stable at ambient conditions.

Additional information

A study was conducted according to OECD TG 133 to determine the thermal stability of the test item using DSC measurement. The test item was weighed in under an inert atmosphere (nitrogen) into the glass crucible.In the temperature range of 30 – 80 °C a small endothermic effect was observed. In the temperature ranges of 120 – 170 °C, 190 – 250 °C and 310 – 330 °C three small exothermic effects was observed, with an overall decomposition energy of approx. -20 J/g. At approx. 420 °C the pressure in the crucibles started to increase.In the DSC-measurements the overall energy of the exothermic effects of the test item in closed glass crucibles was approx. -50 J/g.According to the OECD guideline 113 criteria the test item was considered to be thermal stable at room temperature as no decomposition or chemical transformation was found below 150°C.