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Diss Factsheets

Physical & Chemical properties

Density

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Endpoint:
density, other
Remarks:
density
Type of information:
experimental study
Adequacy of study:
weight of evidence
Study period:
2010-03-30
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Qualifier:
according to guideline
Guideline:
other: ISO 2811
Deviations:
no
GLP compliance:
no
Type of method:
buoyancy method
Specific details on test material used for the study:
- Name of test material (as cited in study report): DNA 195/205 SR
- Lot/batch No.: 1003540
Type:
density
Density:
983 kg/m³
Temp.:
20 °C

The density (ρ) of a substance is the quotient of its mass and its volume and is expressed in SI units of kg/m³.

The density values of the individual measurements were 983 kg/m³.

Conclusions:
The density of nahpthenic acid was determined to be 983 kg/m³ at 20 °C following the ISO-2811 method.
Endpoint:
density, other
Remarks:
density
Type of information:
experimental study
Adequacy of study:
weight of evidence
Study period:
2010-04-23
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Qualifier:
according to guideline
Guideline:
other: ISO 2811
Deviations:
no
GLP compliance:
no
Type of method:
buoyancy method
Specific details on test material used for the study:
- Name of test material (as cited in study report): DNA 190/200 BLR
- Lot/batch No.: 1004549
Type:
density
Density:
907 kg/m³
Temp.:
20 °C
Conclusions:
The density of nahpthenic acid was determined to be 907 kg/m³ at 20 °C following the ISO-2811 method.
Endpoint:
density, other
Remarks:
density
Type of information:
experimental study
Adequacy of study:
weight of evidence
Study period:
2010-07-13
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Qualifier:
according to guideline
Guideline:
other: ISO 2811
Deviations:
no
GLP compliance:
no
Type of method:
buoyancy method
Specific details on test material used for the study:
- Name of test material (as cited in study report): DNA 220 SR
- Lot/batch No.: 1007590
Type:
density
Density:
971 kg/m³
Temp.:
20 °C
Conclusions:
The density of nahpthenic acid was determined to be 971 kg/m³ at 20 °C following the ISO-2811 method.
Endpoint:
density, other
Remarks:
density
Type of information:
experimental study
Adequacy of study:
weight of evidence
Study period:
2010-09-07
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Although study is conducted according to ISO standard there is no study report in accordance with GLP standards available.
Qualifier:
according to guideline
Guideline:
other: ISO 2811
Deviations:
no
GLP compliance:
no
Type of method:
buoyancy method
Type:
density
Density:
942 kg/m³
Temp.:
20 °C
Conclusions:
The density of nahpthenic acid was determined to be 942 kg/m³ at 20 °C following the ISO-2811 method.
Endpoint:
density, other
Remarks:
density
Type of information:
experimental study
Adequacy of study:
weight of evidence
Study period:
2010-01-11
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Qualifier:
according to guideline
Guideline:
other: ISO 2811
Deviations:
no
GLP compliance:
no
Type of method:
buoyancy method
Specific details on test material used for the study:
- Name of test material (as cited in study report): CNA 200/210 SRE
- Lot/batch No.: 1001504
Type:
density
Density:
922 kg/m³
Temp.:
20 °C
Conclusions:
The density of nahpthenic acid was determined to be 922 kg/m³ at 20 °C following the ISO-2811 method.
Endpoint:
density, other
Remarks:
density
Type of information:
experimental study
Adequacy of study:
weight of evidence
Study period:
2010-05-26
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Qualifier:
according to guideline
Guideline:
other: ISO 2811
Deviations:
no
GLP compliance:
no
Type of method:
buoyancy method
Specific details on test material used for the study:
- Name of test material (as cited in study report): CNA 150/160 SR
- Lot/batch No.: 1005565
Type:
density
Density:
949 kg/m³
Temp.:
20 °C
Conclusions:
The density of nahpthenic acid was determined to be 949 kg/m³ at 20 °C following the ISO-2811 method.
Endpoint:
density, other
Remarks:
density
Type of information:
experimental study
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Principles of method if other than guideline:
Data were taken from a peer-reviewed article or handbook.
GLP compliance:
not specified
Type of method:
other: no details provdided
Type:
density
Density:
>= 0.95 - < 0.98 g/cm³
Temp.:
20 °C
Remarks on result:
other: Crude Naphthenic Acid
Type:
density
Density:
>= 0.95 - < 0.98 g/cm³
Temp.:
20 °C
Remarks on result:
other: Refined Naphthenic Acid
Type:
density
Density:
>= 0.95 - < 0.98 g/cm³
Temp.:
20 °C
Remarks on result:
other: Highly refined Naphthenic Acid
Conclusions:
The density of Naphthenic Acid was reported to be 0.95 to <0.98 g/cm³ under the described conditions.
Endpoint:
density, other
Remarks:
density
Type of information:
experimental study
Adequacy of study:
weight of evidence
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
secondary literature
Principles of method if other than guideline:
Data were taken from a secondary source.
Type of method:
other: no details provided
Type:
density
Density:
ca. 0.982 g/cm³
Temp.:
20 °C

Although temperature was not reported it was assumed that the value reflects ambient temperature.

Conclusions:
The density of Naphthenic Acid was reported to be 0.982 g/cm³ under the described conditions.

Description of key information

Values of 0.983, 0.907, 0.971, 0.942, 0.922 and 0.949 at 20°C were reported for the relative density of naphthenic acid following a series of in-house studies according to the ISO-2811 A method (Umicore, 2010) considered reliable with restrictions (K2). Furthermore values of  0.95 to <0.98 and 0.982 are reported by a peer-reviewed handbook (Kirk-Othmer, 1995) assigned reliable with restrictions (K2) and a not assignable (K4) secondary source (NIOSH, 2010), respectively. The values were used in a weight of evidence approach to cover the endpoint.

Key value for chemical safety assessment

Relative density at 20C:
0.945

Additional information

Because naphthenic acid is a mixture of many different isomers of cycloalkyl carboxylic acids, physicochemical properties vary according to the proportions of the individual compounds in their composition. Therefore it is not possible to set a unique value for the relative density of naphthenic acid as this will vary dependent on the hydrocarbon component make-up of the complex mixture. Literature reports a range of 0.95 to <0.98 (Kirk-Othmer,1995). Although values within this range are reported in literature and company data, it is shown that lower and high values are possible, ranging from 0.907 to 0.983. Considering the available data and the fact that naphthenic acid is a UVCB a range of 0.900 to 0.990 seems appropriate.

Value used for CSA: 0.900 to 0.990 at 20 °C