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Significance and Use
The freezing point measured by this test method, when used in conjunction with the physical constants for the hydrocarbons listed in Test Method D1016, allows the determination of the purity of the material under test. A knowledge of the purity of these hydrocarbons is often needed to help control their manufacture and to determine their suitability for use as reagent chemicals or for conversion to other chemical intermediates or finished products.
1.1 This test method covers a procedure for the precise measurement of the freezing points of high-purity hydrocarbons.
1.2 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see 5.1, 6.1 and 6.2. Note 1—For the calculation of the molal purity of essentially pure compounds from measured freezing points and for procedures to be used for the sampling and determination of purity of certain specific compounds, see Test Method D1016.
Note 1—For the calculation of the molal purity of essentially pure compounds from measured freezing points and for procedures to be used for the sampling and determination of purity of certain specific compounds, see Test Method D1016.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D1016 Test Method for Purity of Hydrocarbons from Freezing Points
D1265 Practice for Sampling Liquefied Petroleum (LP) Gases, Manual Method
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
ICS Number Code 71.080.01 (Organic chemicals in general)