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Water solubility

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Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Study period:
October 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with national standard methods
Remarks:
DIN EN 1484
Qualifier:
according to guideline
Guideline:
other: DIN EN 1484
Version / remarks:
Water analysis - Guidelines for the determination of total organic carbon (TOC) and dissolved organic carbon (DOC)
Deviations:
no
GLP compliance:
no
Other quality assurance:
ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
Type of method:
other: determination of dissolved organic carbon
Key result
Water solubility:
< 1 mg/L
Conc. based on:
other: Dissolved organic carbon
Loading of aqueous phase:
100 g/L
Incubation duration:
24 h
Temp.:
20 °C
pH:
8
Remarks on result:
other: value is below limit of quantitation (1 mg/L)
Conclusions:
The water solubility of carbon black is below 1 mg/L (limit of quantitation)
Executive summary:

In a study performed in accodance with DIN EN 1484 the water solubility was below the limit of quantitation (1 mg/L). It is concluded that Carbon Black (Printex 25) is practically insoluble in water.

Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Study period:
October 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with national standard methods
Remarks:
DIN EN 1484
Qualifier:
according to guideline
Guideline:
other: DIN EN 1484
Version / remarks:
Water analysis - Guidelines for the determination of total organic carbon (TOC) and dissolved organic carbon (DOC)
Deviations:
no
GLP compliance:
no
Other quality assurance:
ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
Type of method:
other: determination of dissolved organic carbon
Key result
Water solubility:
< 1 mg/L
Conc. based on:
other: Dissolved organic carbon
Loading of aqueous phase:
100 g/L
Incubation duration:
24 h
Temp.:
20 °C
pH:
8
Remarks on result:
other: value is below limit of quantitation (1 mg/L)
Conclusions:
The water solubility of carbon black is below 1 mg/L (limit of quantitation)
Executive summary:

In a study performed in accodance with DIN EN 1484 the water solubility was below the limit of quantitation (1 mg/L). It is concluded that Carbon Black (Printex 35) is practically insoluble in water.

Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Study period:
October 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with national standard methods
Remarks:
DIN EN 1484
Qualifier:
according to guideline
Guideline:
other: DIN EN 1484
Version / remarks:
Water analysis - Guidelines for the determination of total organic carbon (TOC) and dissolved organic carbon (DOC)
Deviations:
no
GLP compliance:
no
Other quality assurance:
ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
Type of method:
other: determination of dissolved organic carbon
Key result
Water solubility:
< 1 mg/L
Conc. based on:
other: Dissolved organic carbon
Loading of aqueous phase:
100 g/L
Incubation duration:
24 h
Temp.:
20 °C
pH:
8
Remarks on result:
other: value is below limit of quantitation (1 mg/L)
Conclusions:
The water solubility of carbon black is below 1 mg/L (limit of quantitation)
Executive summary:

In a study performed in accodance with DIN EN 1484 the water solubility of carbon black (printex 90) was below the limit of quantitation (1 mg/L).

Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Study period:
October 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with national standard methods
Remarks:
DIN EN 1484
Qualifier:
according to guideline
Guideline:
other: DIN EN 1484
Version / remarks:
Water analysis - Guidelines for the determination of total organic carbon (TOC) and dissolved organic carbon (DOC)
Deviations:
no
GLP compliance:
no
Other quality assurance:
ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
Type of method:
other: determination of dissolved organic carbon
Key result
Water solubility:
< 1 mg/L
Conc. based on:
other: Dissolved organic carbon
Loading of aqueous phase:
100 g/L
Incubation duration:
24 h
Temp.:
20 °C
pH:
8
Remarks on result:
other: value is below limit of quantitation (1 mg/L)
Conclusions:
The water solubility of carbon black is below 1 mg/L (limit of quantitation)
Executive summary:

In a study performed in accodance with DIN EN 1484 the water solubility was below the limit of quantitation (1 mg/L). It is concluded that Carbon Black (XPB 538) is practically insoluble in water.

Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Study period:
September 2020
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with national standard methods
Qualifier:
according to guideline
Guideline:
other: DIN EN 1484 - 2019-04
Version / remarks:
Water analysis - Guidelines for the determination of total organic carbon (TOC) and dissolved organic carbon (DOC)
Deviations:
no
GLP compliance:
no
Other quality assurance:
ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
Type of method:
other: determination of dissolved organic carbon
Key result
Water solubility:
1.4 mg/L
Conc. based on:
other: Dissolved organic carbon
Loading of aqueous phase:
100 g/L
Incubation duration:
ca. 24 h
Temp.:
20 °C
pH:
8
Remarks on result:
other: measurement uncertainty (coverage factor k = 2) is at 29%
Conclusions:
The water solubility of carbon black (Printex Kappa 100) is 1.4 mg/L
Executive summary:

In a study performed in accodance with DIN EN 1484 solubility in water measured as total organic carbon was 1.4 mg/L. This value is still in the error range of this assay. Information provided by Eurofins indicates that the measurement uncertainty (coverage factor k = 2) is at 29%. In light of this, it is concluded that Carbon Black (Printex Kappa 100) is practically insoluble in water.

Description of key information

To assess the solubility potential of carbon black (solid: nanoform, no surface treatment), dissolved organic carbon (DOC) was used as a surrogate measure for solubility. Tests performed in accordance with the recommendations of DIN EN 1484 for five representative nanoforms of carbon black (with no surface treatment) showed DOC values ranging from below the limit of quantitation (1 mg/L) to 1.4 mg/L. It is concluded based on these results that not-treated nanoforms of carbon black are insoluble in water at room temperature.

Key value for chemical safety assessment

Water solubility:
1 mg/L
at the temperature of:
20 °C

Additional information