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Diss Factsheets

Administrative data

nanomaterial specific surface area
Type of information:
experimental study
Adequacy of study:
key study
Study period:
02-11 April 2018
1 (reliable without restriction)

Data source

Reference Type:
study report
Report date:

Materials and methods

GLP compliance:
but study conducted in a laboratory holding a current statement of GLP compliance.
Details on methods and data evaluation:
The test substance, titanium nitride, was conditioned for 16 hours at 40 °C, with a Nitrogen gas purge, cooled and then run on the Porosimeter.

Full isothermal analysis (porosity) was performed using Barrett-Joyner-Halenda (BJH) method with relative pressure (P/Po) range of 0.05 up to 1.00 followed by desorption back down to a relative pressure of 0.06.

The BET Surface Area was assessed using the relative pressure (P/Po) range of 0.05 up to 0.30 and a minimum of 3 points selected over the range to obtain acceptable correlation coefficients of ≥ 0.9975 and positive intercept.

Duplicated analysis was performed.

Test material

Constituent 1
Chemical structure
Reference substance name:
Titanium nitride
EC Number:
EC Name:
Titanium nitride
Cas Number:
Molecular formula:
titanium nitride
Test material form:
solid: nanoform
Specific details on test material used for the study:
Weights taken: Weight 1: 03553g
Weight 2: 0.4253g

Data gathering

Micromeritics Tristar II 3020 Porosimeter with SmartPrep 065, LIMS 2214, SOP 099.02/2
System Suitability
The instrument was checked using carbon black reference standard, Intertek Standard Reference 02593.03.

Specification: 21.52 ± 0.75 m2/g
Result: 21.2728 m2/g

Correlation coefficients of ≥ 0.9975 and positive intercepts were obtained for the carbon black reference standard and duplicated sample analysis.

System suitability has passed.

Results and discussion

Specific surface areaopen allclose all
Key result
Specific Surface Area:
26.5 m²/g
Remarks on result:
other: mean
Specific Surface Area:
26.4 m²/g
Remarks on result:
other: Replicate 1
Specific Surface Area:
26.55 m²/g
Remarks on result:
other: Replicate 2

Applicant's summary and conclusion

The mean surface area of TiN, measured with a porosimeter, is 26.5 m2/g.