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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Physical & Chemical properties


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relative density
Type of information:
experimental study
Adequacy of study:
key study
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Carried out in house following ISO approved method, testing laboratory is ISO 9001 compliant but full report is not audited.
according to guideline
other: in-house method
Principles of method if other than guideline:
8g of test substance are compressed to 800psi using a cam press and small dye, the compressed material is then added to the sample chamber of the pycnometer and measurements carried out according to the operating instructions of the instrument.
GLP compliance:
Type of method:
pycnometer method
Key result
relative density
>= 2.6 - <= 2.8 g/cm³
20 °C

Date Tested Project Sample Number Equipment File Number Keyword 1 Keyword 2 Keyword 3 Average Density (g/cm3) Standard Deviation Average Volume (cm3)  Standard Deviation
06 May 2010 BG-10-X99-2981 BG-PYC-09-0587 Superwool AES  Covance sample 1 Final 2.7241 0.0000 2.4610 0.0000
06 May 2010 BG-10-X99-2981 BG-PYC-09-0588 Superwool AES  Covance sample 2 Final 2.7207 0.0000 2.7031 0.0000
06 May 2010 BG-10-X99-2981 BG-PYC-09-0589 Superwool AES  Covance sample 3 Final 2.7240 0.0000 2.8553 0.0000
The density measured on this sample of Superwool AES falls within the standard range given on company published literature.

Description of key information

The typical density of this substance falls between 2.6 and 2.8g/cm3.

Key value for chemical safety assessment

Relative density at 20C:

Additional information

Variations in density within the range stated above can occur and are due to differences in manufacturing methods and production controls.