ASTM D852-00

Standard Test Method for Solidification Point of Benzene

SCOPE
1.1 This test method covers the determination of the solidification point of benzene.
1.2 The following applies to all specified limits in this test method: for purposes of determining conformance with this test method, an observed value or a calculated value shall be rounded off "to the nearest unit" in the last right-hand digit used in expressing the specification limit, in accordance with the rounding-off method of Practice E 29.
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 Section 7.

General Information

• Status: Historical
• Publication Date: 09-Jun-2000
• Technical Committee: D16 - Aromatic, Industrial, Specialty and Related Chemicals
• Drafting Committee: D16.01 - Benzene, Toluene, Xylenes, Cyclohexane and Their Derivatives

Relations

• Referred By: ASTM D6875-23 - Standard Test Method for Solidification Point of Industrial Organic Chemicals by Thermistor
• Effective Date: 10-Jun-2000
• Referred By: ASTM D2359-19 - Standard Specification for Refined Benzene-535
• Effective Date: 10-Jun-2000
• Referred By: ASTM D4734-20 - Standard Specification for Refined Benzene-545
• Effective Date: 10-Jun-2000
• Referred By: ASTM D7185-19 - Standard Specification for Low Toluene Low Dioxane (LTLD) Benzene
• Effective Date: 10-Jun-2000
• Referred By: ASTM E324-23 - Standard Test Method for Relative Initial and Final Melting Points and the Melting Range of Organic Chemicals
• Effective Date: 10-Jun-2000
• Referred By: ASTM D5871-19 - Standard Specification for Benzene for Cyclohexane Feedstock
• Effective Date: 10-Jun-2000

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 852 – 00
Standard Test Method for
Solidification Point of Benzene
This standard is issued under the fixed designation D 852; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope * OSHA Regulations, 29CFR, paragraphs 1910.1000 and
1910.1200
1.1 This test method covers the determination of the solidi-
fication point of benzene.
3. Terminology
1.2 The following applies to all specified limits in this test
3.1 Definitions:
method: for purposes of determining conformance with this
3.1.1 solidification point—an empirical constant defined as
test method, an observed value or a calculated value shall be
the temperature at which the liquid phase of a substance is in
rounded off “to the nearest unit” in the last right-hand digit
approximate equilibrium with a relatively small portion of the
used in expressing the specification limit, in accordance with
solid phase.
the rounding-off method of Practice E 29.
3.1.1.1 Discussion—Solidification point is distinguished
1.3 This standard does not purport to address all of the
from freezing point which is described in Test Method D 1015.
safety concerns, if any, associated with its use. It is the
An interpretation of mol percent purity in terms of freezing
responsibility of the user of this standard to establish appro-
point is given in Test Method D 1016.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. For specific hazard
4. Summary of Test Method
statements, see Section 7.
4.1 Solidification point is measured by noting the maximum
temperature reached during a controlled cooling cycle after the
2. Referenced Documents
appearance of a solid phase.
2.1 ASTM Standards:
D 1015 Test Method for Freezing Points of High-Purity
5. Significance and Use
Hydrocarbons
5.1 This test method may be used as a criteria for determin-
D 1016 Test Method for Purity of Hydrocarbons from
2 ing the purity of benzene. The closer the solidification point
Freezing Points
3 reaches that of pure benzene, the purer the sample.
D 1193 Specification for Reagent Water
D 3437 Practice for Sampling and Handling Liquid Cyclic
6. Apparatus
Products
5 6.1 Benzene Container (Air Jacketed):
E 1 Specification for ASTM Thermometers
6.1.1 Inner Container, a test tube 15 mm in outside diameter
E 29 Practice for Using Significant Digits in Test Data to
and 125 mm in length.
Determine Conformance with Specifications
6.1.2 Air Jacket, a standard test tube 25 mm in outside
2.2 Other Document:
diameter and 150 mm in length.
6.1.3 Insulation—Dry absorbent cotton or glass wool.
6.2 Benzene Container (thick walled), a glass test tube 18
mm in outside diameter, 14 mm in inside diameter and 150 mm
in length.
This test method is under the jurisdiction of ASTM Committee D16 on
6.3 Ice Bath, a 1-L beaker, or similar suitable container,
Aromatic Hydrocarbons and Related Chemicals and is the direct responsibility of
having an effective depth of at least 127 mm and filled with
Subcommittee D16.01 on Benzene, Toluene, Xylenes, Cyclohexane, and Their
chipped or shaved ice.
Derivatives.
Current edition approved June 10, 2000. Published August 2000. Originally 6.4 Stirrer, consisting of a 1-mm wire (copper or stainless
published as D 852 – 45. Last previous edition D 852 – 97.
steel) or a 2-mm glass rod with one end bent into a circular
Annual Book of ASTM Standards, Vol 05.01.
Annual Book of ASTM Standards, Vol 11.01.
Annual Book of ASTM Standards, Vol 06.04.
5 7
Annual Book of ASTM Standards, Vol 14.03. Available from Superintendent of Documents, U.S. Government Printing
Annual Book of ASTM Standards, Vol 14.02. Office, Washington, DC 20402.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D 852
form at right angles to the shaft so that it will move freely in Safety Data Sheets, and local regulations for all materials used
the annular space between the thermometer stem and the wall in this test method.
of the smaller test tube.
6.5 Temperature Measurement Device, either device de-
8. Sampling
scribed below has been found satisfactory.
8.1 Sample the material in accordance with Practice
6.5.1 Thermometer, an ASTM Benzene Freezing Point
D 3437.
Thermometer having a range from 4.0 to 6.0°C and conform-
ing to the requirements for Thermometer 112C as prescribed in
9. Preparation of Apparatus
Specification E 1.
9.1 Fit the benzene container with a two-hole cork stopper.
6.5.2 Thermistor, Type CSP with accuracy of 0.01° C with
Through one hole insert the temperature measurement device.
a nominal resistance at 2500 V at 25°C. The thermistor shall be
The thermometer should be inserted up to the 4.0°C mark. The
equipped with an ohm meter capable of reading resistance to
termistor should be inserted so as to contact the benzene
the nearest 0.1 V.
solution. Through the other hole insert shaft of the stirrer.
6.6 Stirring Apparatus (Optional), the apparatus illustrated
in Fig. 1 has been demonstrated to be an acceptable replace- 9.2 If using the benzene container (air jacketed), place a
ment for manually stirring the benzene solution. ⁄8-in. (3.2-mm) layer of dry absorbent cotton or glass wool in
the bottom of the larger test tube an
...