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Physical & Chemical properties

Density

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Endpoint:
density, other
Remarks:
Skeleton
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail
Qualifier:
according to
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
Version / remarks:
The method is described in DIN 66137-2/EP 2.9.23
GLP compliance:
yes
Other quality assurance:
ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
Type of method:
air comparison pycnometer (for solids)
Key result
Type:
other: skeleton density
Density:
2.38 g/cm³
Temp.:
20 °C
Conclusions:
AEROSIL 200 is of relatively high skeleton density of 2.38 g/cm³
Endpoint:
density, other
Remarks:
Skeleton
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
comparable to guideline study
Qualifier:
equivalent or similar to
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
GLP compliance:
yes
Type of method:
air comparison pycnometer (for solids)
Remarks:
thermostatic Helium pycnometer
Specific details on test material used for the study:
Designation in Test Facility: SYLOID® 244 FP, CAS No. 7631-86-9
Date of Receipt: 15. June 2016
Condition at receipt: closed vessel, in proper conditions
Key result
Type:
other: skeleton density
Density:
1.81 g/cm³
Temp.:
20 °C
Conclusions:
Syloid 244 FP is of relatively low skeleton density of 1.81 g/cm³

Description of key information

Low end Skeleton density is 1.81 g/ml for Syloid 244 FP, a gel type of SAS

High end Skeleton density is 2.38 g/ml for Aerosil 200, a pyrogenic type of SAS.

Similiar to the BET ranges also these density values represent an overall range of the various SAS products.

Lower values down to 1.1 g/ml can be found at colloidal SAS (e.g. Ludox AM). In this case this value refers to the suspension resp. the silica concentration will drive here the density.

Key value for chemical safety assessment

Additional information