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ASTM D612-88(2017)

(Test Method)

Standard Test Method for Carbonizable Substances in Paraffin Wax

Standard Test Method for Carbonizable Substances in Paraffin Wax

SIGNIFICANCE AND USE
4.1 This test method is a means for ascertaining whether pharmaceutical paraffin wax conforms to the standards for quality prescribed by the U.S. National Formulary.
SCOPE
1.1 This test method covers determination of carbonizable substances in paraffin wax. The test method is applicable to paraffin wax for pharmaceutical use, as defined by the U.S. National Formulary, with a melting point as determined in accordance with Test Method D87, between 117 °F and 149 °F (47 °C and 65 °C).  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
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. Specific warning statements are given in Annex A1.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

Status
Published
Publication Date
31-May-2017
ICS
75.140 - Waxes, bituminous materials and other petroleum products
Technical Committee
D02 - Petroleum Products, Liquid Fuels, and Lubricants
Drafting Committee
D02.10 - Properties of Petroleum Waxes and Alternative Wax-like Materials
Current Stage
Ref Project

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ASTM D612-88(2017) - Standard Test Method for Carbonizable Substances in Paraffin WaxASTM D612-88(2017) - Standard Test Method for Carbonizable Substances in Paraffin Wax
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ASTM D612-88(2017) - Standard Test Method for Carbonizable Substances in Paraffin Wax
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D612 − 88 (Reapproved 2017)
Standard Test Method for
1
Carbonizable Substances in Paraffin Wax
This standard is issued under the fixed designation D612; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope 3. Summary of Test Method
3.1 Five millilitres of melted wax are treated with 5 mL of
1.1 This test method covers determination of carbonizable
concentrated, nitrogen-free sulfuric acid at 158 °F (70 °C). The
substances in paraffin wax. The test method is applicable to
color of the acid layer is compared with that of a colorimetric
paraffin wax for pharmaceutical use, as defined by the U.S.
reference standard. If the color is not darker than the standard,
National Formulary, with a melting point as determined in
the wax is reported as passing the test.
accordance with Test Method D87, between 117 °F and 149 °F
(47 °C and 65 °C).
4. Significance and Use
1.2 The values stated in inch-pound units are to be regarded
4.1 This test method is a means for ascertaining whether
as standard. The values given in parentheses are mathematical
pharmaceutical paraffin wax conforms to the standards for
conversions to SI units that are provided for information only
quality prescribed by the U.S. National Formulary.
and are not considered standard.
5. Apparatus
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5.1 Test Tube, as shown in Fig. 1, of heat-resistant glass (see
responsibility of the user of this standard to establish appro-
Note 1) fitted with a well-ground glass stopper, the stopper and
priate safety and health practices and determine the applica- the tube bearing identical and indestructible numbers. The tube
bility of regulatory limitations prior to use. Specific warning shall be 140 mm 6 2 mm in length and between 14.5 mm and
statements are given in Annex A1. 15.0 mm in outside diameter, and shall be calibrated at the
5 mL 6 0.2 mL and 10 mL 6 0.2 mL liquid levels. The
1.4 This international standard was developed in accor-
capacity of the tube with stopper inserted shall be between
dance with internationally recognized principles on standard-
13.6 mL and 15.6 mL. A rolled edge may be provided for
ization established in the Decision on Principles for the
suspending the tube on the cover of the water bath.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
NOTE 1—Borosilicate glass has been found satisfactory for this pur-
Barriers to Trade (TBT) Committee. pose.
5.2 Water Bath, suitable for immersing the test tube above
2. Referenced Documents
the 10 mL line and equipped to maintain a temperature of
2 158 °F 6 1.0 °F (70 °C 6 0.5 °C). The bath shall be provided
2.1 ASTM Standards:
with a cover of any suitable material, with holes approximately
D87 Test Method for Melting Point of Petroleum Wax
16 mm in diameter through which the test tubes may be
(Cooling Curve)
suspended.
D1193 Specification for Reagent Water
5.3 Color Comparator, of a suitable type for observing the
color of the acid layer in comparison with the reference
standard color solution. The size and shape of the comparator
1
This test method is under the jurisdiction of ASTM Committee D02 on
are optional, but the size and shape of the apertures shall
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
Subcommittee D02.10 on Properties of Petroleum Waxes and Alternative Wax-like conform to the dimensions prescribed in Fig. 1.
Materials.
Current edition approved June 1, 2017. Published July 2017. Originally approved
6. Reagents
in 1941. Last previous edition approved in 2012 as D612 – 88 (2012). DOI:
10.1520/D0612-88R17.
6.1 Purity of Reagents—Reagent grade chemicals shall be
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
used in all tests. Unless otherwise indicated, it is intended that
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
all reagents shall conform to the specifications of the Commit-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. tee on Analytical Reagents of the American Chemical Society,
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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