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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Density

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Endpoint:
relative density
Type of information:
not specified
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Qualifier:
no guideline followed
Principles of method if other than guideline:
The use of secondary sources of data is acceptable when they are based on a critical evaluation of peer-reviewed data and a consequent selection of a reliable and representative values for the properties under investigation.

The introduction to the Merck Index states that physical data are cited as found in the literature. When several alternate data values appear in the literature, the data is evaluated and representative selections are made; values are then reported with the corresponding source. Therefore, although the method used is not known, the values presented here are acceptable as they are from a reliable secondary source of phys chem. data.
GLP compliance:
not specified
Type of method:
other: unknown method
Type:
relative density
Density:
1.422 g/cm³
Remarks on result:
other: no temperature available
Conclusions:
The test substance density was determined to be 1.422 g/cm3 based on a result taken from peer reviewed handbook data.
Endpoint:
relative density
Type of information:
not specified
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Qualifier:
no guideline followed
Principles of method if other than guideline:
Data detailed in the International Chemical Safety Card (ICSC) for 1,4-Naphthoquinone. These cards are meant as a way of summarising essential information on chemical substances; and were jointly developed by the IPCS and the European Commission.

The cards are then peer-reviewed by a committee consisting of internationally-recognized experts who take into account advice given by manufacturers, workers' representatives and poisons centres.

The use of secondary sources of data is acceptable when they are based on a critical evaluation of peer-reviewed data and a consequent selection of a reliable and representative values for the properties under investigation.

Based on the above information, although full experimental details are unknown, the values presented here are acceptable as they are considered to be from a reliable secondary source of phys chem. data.
GLP compliance:
not specified
Type of method:
other: unknown method
Type:
relative density
Density:
1.4 g/cm³
Remarks on result:
other: No temperature provided.
Conclusions:
The test substance density was determined to be 1.4 g/cm3 based on a result taken from peer reviewed handbook data.
Endpoint:
relative density
Type of information:
not specified
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Authorative database
Qualifier:
no guideline followed
Principles of method if other than guideline:
The authoritative database form the Institute for Occupational Safety and Health of the German Social Accident Insurance (GESTIS database) is regarded as reliable literature source and was taken into account in this weight of evidence approach. The GESTIS database reports the density to be 1.42 g/cm3 at 20°C.
GLP compliance:
not specified
Type of method:
other: unknown method
Type:
relative density
Density:
1.42 g/cm³
Temp.:
20 °C
Conclusions:
The density is reported as 1.42 g/cm3 at 20°C based on information included in the GESTIS database.

Description of key information

A total of three similar density values (1.4, 1.42 and 1.422 g/cm3) are available for this substance based on reliable handbook/secondary source data. The value of 1.4 g/cm3 is selected as the key value for chemical safety assessment.

Key value for chemical safety assessment

Relative density at 20C:
1.4

Additional information