Scope
Outline of Method
Apparatus
Procedure
Initial Test
Recorded Tests
Reporting Data
Standardization
Specific gravity: 15.56 °C./15.56 °C., 0.860 minimum, 0.866 maximum
Boiling range: 2 °C. maximum from start to dry point when tested in accordance with the method of test for distillation of industrial aromatic hydrocarbons (ASTM designation: D 850), or the method of test for distillation range of lacquer solvents and diluents (ASTM) designation D 1078). The range shall include the boiling point of pure P-xylene, which is 138.35 °C. (281.03 °F.).
Purity: 95 percent minimum, calculated in accordance with the method of test for determination of purity from freezing points of high-purity compounds (ASTM designation: D 1016), from the experimentally determined freezing point, measured by the method of test for measurement of freezing points of high-purity compounds for evaluation of purity (ASTM designation: D 1015).
Specific gravity: 0.8175 to 0.8185 at 20 °C./20 °C. as determined by means of a calibrated pycnometer.
Distillation range: Shall entirely distill within a 1.0 °C. range which shall include the temperature 80.4 °C. as determined by ASTM method D 1078.
Average these values for each compound. If the difference between the values for these two compounds is less than 15 °F. (8.5 °C.) or more than 27 °F. (16 °C.), repeat the determinations or obtain fresh standards.
X = 92 - A
Y = 71 - B
Correction = (X + Y) / 2.
Where:
A = Observed flash of p- xylene, and
B = Observed flash of isopropyl alcohol.
Apply this correction of all determinations.
Half units in correction shall be discarded.
Precision
16 C.F.R. §1500.43
The test apparatus and procedure described in § 1500.43 may be used by manufacturers and labelers of products subject to the Federal Hazardous Substances Act to determine flashpoint temperatures of those products under the conditions set forth in § 1500.3(c)(6)(iv) , as amended.