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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Stability: thermal, sunlight, metals

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Administrative data

Endpoint:
stability: thermal, sunlight, metals, other
Remarks:
'Stability: thermal, sunlight, metals'
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Scientifically acceptable

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2009
Report date:
2009

Materials and methods

Test guideline
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 113 (Screening Test for Thermal Stability and Stability in Air)
Version / remarks:
Differential scanning calorimetry (DSC)
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
N-sodiohexamethyldisilazane
EC Number:
213-983-8
EC Name:
N-sodiohexamethyldisilazane
Cas Number:
1070-89-9
Molecular formula:
C6H19NSi2.Na
IUPAC Name:
sodiobis(trimethylsilyl)amine
Details on test material:
- Name of test material (as cited in study report): NaHMDS powder
- Analytical purity: 98.5 w%
- Impurities (identity and concentrations): rest level at 0.3-
0.4 w% THF along with 0.19 w% NaOH

Results and discussion

Any other information on results incl. tables

Results indicated initiation at 212 °C (246 J/g) in pressurized stainless

steel cups and inert conditions. NaHMDS shows endothermic events due to melting between 115-153 °C.

NaHMDS melts at 171-175 °C.

Applicant's summary and conclusion