Methyl-tris acetonoximo-silane

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2017-10-30 to 2017-11-23

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling Point)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

method according to Siwoloboff

Specific details on test material used for the study:

- Appearance: yellowish liquid
- Composition: 95.4% MAC, 1.6 % MAC-Dimer, 2.9% Acetone oxime
- Purity: 95.4%
- Batch No.: 20160817
- Expiry date: 16.08.2018

Key result

Atm. press.:

1 023 hPa

Decomposition:

yes

Decomp. temp.:

ca. 155 °C

Remarks on result:

other: No boiling point could be determined due to decomposition

Determination of the boiling point:

The value of the boiling point was determined visually. The preliminary study and measurements were performed at atmospheric pressure of 1023 hPa. The preliminiary study was carried out in order to determine the boiling temperature range of methyl-tris acetonoximo-silane (MAC). The study was performed in the range 50 -400 °C. With increasing temperature, the test item in the outer capillary becomes dark (from about 155.2 °C under atmospheric pressure of 1023 hPa). From visual observation it is evident that methyl-tris acetonoximo-silane (MAC) decomposes below the boiling point under atmospheric pressure of 1023 hPa.

Three series of measurements were performed in the temperature range 147.0 -317.0 °C. Below the temperature of 147 °C, the temperature gradient of 3 °C/min was used. Above 147 °C the used gradient was 1.0 °C/min. In all cases, the substance decomposed at approximately 154.0 °C. The average values of the initial decomposition temperature for the three samples is 154.5 ± 0.2 °C (Table 1). The accuracy of the apparatus was equal to 0.5 °C.

Table 1: Observed values of the initial decomposition temperature of methyl-tris acetonoximo-silane at atmospheric pressure.

Sample	Initial decomposition temperature, °C
1	154.7
2	154.4
3	154.4
Average value ± standard deviation, °C	154.5 ± 0.2

Conclusions:

Methyl-tris acetonoximo-silane (MAC) decomposed below boiling point at 154.5 ± 0.2 °C under atmospheric pressure of 1023 hPa.

Executive summary:

The boiling point of methyl-tris acetonoximo-silane (MAC) was determined according to OECD Guideline 103. The substance decomposed below boiling point at 154.5 ± 0.2 °C under atmospheric pressure of 1023 hPa. Therefore, the study of the boiling point was not performed.

Description of key information

The boiling point of methyl-tris acetonoximo-silane (MAC) was determined according to OECD Guideline 103. The substance decomposed below boiling point at 154.5 ± 0.2 °C under atmospheric pressure of 1023 hPa. Therefore, the study of the boiling point was not performed.