TT-N-97 Naphtha; AromaticThis specification covers aromatic petroleum naphtha for use in the manufacture of paints and in the formulation of other industrial products.

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TT-N-97D

TABLE V. Test methods.

Test	ASTM standard	FED-STD-141 test method	Paragraph
Specific gravity @ 20C/20C	D 891
Flash point	D 56
Aniline point	D 611
Mixed aniline point	D 611
Distillation	D 1078
Color	D 156
Nonvolatile matter	D 1353
Appearance		4261
Odor	D 1296		4.4.3.1
Copper corrosion	D 130
Doctor test	D 235
Spot test			4.4.3.2
Water test	D 1476
Acidity	D 847
Residue	D 1093
Stability			4.4.3.3

4.4.3.1 Odor. The residual odor of the naphtha shall be determined after the filter paper has been allowed to dry at standard conditions (see 4.4.2) for 24 hours.

4.4.3.2 Spot test.

4.4.3.2.1 Apparatus. No. 2 Whatman or equal 12.5 cm in diameter filter paper.

4.4.3.2.2 Procedure. Transfer five drops of the sample by means of a small pipette or burette to the center of a No. 2 Whatman (or equivalent) filter paper, 12.5 centimeters (cm) in diameter support on a 7-cm crystallizing dish and allow the liquid to evaporate at 21 °C to 32 °C (69.8 °F to 89.6 °F), away from direct sunlight and strong drafts. Examine the paper visually for the presence of any stain or residual oiliness after 30 minutes.

4.4.3.3 Stability.

4.4.3.3.1 Apparatus. The apparatus shall consist of a glass container such as an 8-ounce oil bottle, a suitable metal bomb to hold the glass container at the required pressures, and a water or a steam bath.