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EC number: 640-410-2 | CAS number: 2594-75-4
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- Endpoint:
- melting point/freezing 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 102 (Melting point / Melting Range)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- method to determine freezing temperature
- 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
- Melting / freezing pt.:
- ca. -5 °C
- Conclusions:
- An average value of the initial freezing point of methyl-tris acetonoximo-silane (MAC) was determined to be -5.0 ± 0.9 °C.
- Executive summary:
The freezing point of methyl-tris acetonoximo-silane (MAC) was determined according to OECD Guideline 102 using the method of crystallization tube in freezing mixture ice/acetone. An average value of the initial freezing point of methyl-tris acetonoxime-silane (MAC) of -5.0 ± 0.9 °C was determined.
Reference
Two measurement runs have been done. The first crystals of methyl-tris acetonoximo-silane (MAC) emerged at the temperature -5.0 ± 0.9 °C (average value) and gradually the substance began to crystallize. Results are shown in the following Table 1.
Table 1: Measurement of the freezing point of methyl-tris acetonoximo-silane (MAC)
| Measurement No.1 | Measurement No.2 | ||
| Time [min] | Temperature [° C] | Time [min] | Temperature [° C] |
| 0.0 | 2.6 | 0.0 | 2.0 |
| 1.0 | 2.0 | 1.0 | 1.9 |
| 2.0 | 1.6 | 2.0 | 1.7 |
| 3.0 | 1.3 | 3.0 | 1.2 |
| 4.0 | 0.9 | 4.0 | 0.9 |
| 5.0 | 0.4 | 5.0 | 0.6 |
| 6.0 | 0.0 | 6.0 | 0.1 |
| 7.0 | -0.3 | 7.0 | -0.5 |
| 8.0 | -0.7 | 8.0 | -0.8 |
| 9.0 | -1.1 | 9.0 | -1.2 |
| 10.0 | -1.3 | 10.0 | -1.8 |
| 11.0 | -1.5 | 11.0 | -2.1 |
| 12.0 | -1.7 | 12.0 | -2.5 |
| 13.0 | -1.9 | 13.0 | -3.0 |
| 14.0 | -2.1 | 14.0 | -3.4 |
| 15.0 | -2.4 | 15.0 | -3.7 |
| 16.0 | -2.7 | 16.0 | -4.3 |
| 17.0 | -3.1 | 17.0 | -4.6 |
| 18.0 | -3.5 | 18.0 | -5.0 |
| 19.0 | -4.0 | 19.0 | -5.6 |
| 20.0 | -4.3 | 20.0 | -6.0 |
| 21.0 | -4.7 | - | - |
| Average value ± standard deviation, °C | -5.0 ± 0.9 | ||
Description of key information
The freezing point of methyl-tris acetonoximo-silane (MAC) was determined according to OECD Guideline 102 using the method of crystallization tube in freezing mixture ice/acetone. An average value of the initial freezing point of methyl-tris acetonoxime-silane (MAC) of -5.0 ± 0.9 °C was determined.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- -5 °C
Additional information
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