ASTM D465-96

Standard Test Methods for Acid Number of Naval Stores Products Including Tall Oil and Other Related Products

SCOPE
1.1 These test methods are intended for determining the acid number of naval store products as defined in Terminology D804  including tall oil products, wood and gum rosin, and other related materials. These test methods may not be applicable to all modified rosin products. Two test methods are covered, as follows:
1.1.1 Potentiometric method (referee), and
1.1.2 Internal indicator method (alternate).
1.2 The potentiometric method is suitable for use with both light- and dark-colored products. It should be considered the referee method. The internal indicator method is suitable for use only with light- and medium-colored products with a Gardner color of less than 12. It should be considered the alternate method.
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.

General Information

• Status: Historical
• Publication Date: 09-Jun-2001
• ICS: 87.060.20 - Binders
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.34 - Pine Chemicals and Hydrocarbon Resins

Relations

• Replaced By: ASTM D465-01 - Standard Test Methods for Acid Number of Naval Stores Products Including Tall Oil and Other Related Products
• Effective Date: 10-Jun-2001
• Referred By: ASTM D1585-15(2020) - Standard Test Methods for Fatty Acids Content of Pine Chemicals, Including Rosin, Tall Oil, and Related Products
• Effective Date: 10-Jun-2001
• Referred By: ASTM B32-20 - Standard Specification for Solder Metal
• Effective Date: 10-Jun-2001
• Referred By: ASTM D803-15(2020) - Standard Test Methods for Testing Tall Oil
• Effective Date: 10-Jun-2001
• Referred By: ASTM D509-20 - Standard Test Methods of Sampling and Grading Rosin
• Effective Date: 10-Jun-2001

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NOTICE: This standard has either been superseded and replaced by a new version or discontinued.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 465 – 96
Standard Test Methods for
Acid Number of Naval Stores Products Including Tall Oil
1
and Other Related Products
This standard is issued under the fixed designation D 465; 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 oil and tall oil derived products as test materials. Test Methods
D 803 currently includes a method for the determination of
1.1 These test methods are intended for determining the acid
acid number. The details of that procedure will be deleted when
number of naval store products as defined in Terminology
2
Test Methods D 803 are revised.
D 804 including tall oil products, wood and gum rosin, and
3.2 The acid number is an important property of naval stores
other related materials. These test methods may not be appli-
products, tall oil, and the products obtained by the fractionation
cable to all modified rosin products. Two test methods are
of tall oil. It is the test method widely used to determine the
covered, as follows:
total free acid content of these products.
1.1.1 Potentiometric method (referee), and
3.3 The potentiometric test method should be used when the
1.1.2 Internal indicator method (alternate).
most reproducible results are required.
1.2 The potentiometric method is suitable for use with both
light- and dark-colored products. It should be considered the
4. Preparation of Sample
referee method. The internal indicator method is suitable for
4.1 If the sample for analysis is rosin, it shall consist of
use only with light- and medium-colored products with a
small pieces of rosin chipped from a freshly exposed part of a
Gardner color of less than 12. It should be considered the
lump or lumps, and thereafter crushed to facilitate weighing
alternate method.
and dissolution. Prepare the sample the same day on which the
1.3 This standard does not purport to address all of the
test is begun, in order to avoid changes in properties due to
safety concerns, if any, associated with its use. It is the
surface oxidation. This is very pronounced on ground rosin
responsibility of the user of this standard to establish appro-
having a large surface area exposed to the air. Existing rosin
priate safety and health practices and determine the applica-
dust and powdered rosin must not be used.
bility of regulatory limitations prior to use.
4.2 If the sample is a nonhomogenous liquid, heat the entire
2. Referenced Documents sample in a closed container fitted with a capillary vent or the
equivalent. Some kind of agitation, even if done occasionally
2.1 ASTM Standards:
2
by hand, saves much time. Heat by immersion in open steam or
D 803 Test Methods of Testing Tall Oil
hot water bath to avoid overheating. When dealing with
D 804 Terminology Relating to Naval Stores, Including Tall
2
crystallized rosin a temperature of approximately 160°C may
Oil and Other Related Products
be needed. Sampling should take place only when the entire
E 70 Test Method for pH of Aqueous Solutions with the
3
sample is homogeneous and has been well stirred.
Glass Electrode
4.3 For other products no special preparation is necessary
E 177 Practice for the Use of the Terms Precision and Bias
4
except storage in a closed container prior to testing.
in ASTM Test Methods
4.4 Guideline for sample size, solvent, and titrant:
E 691 Practice for Conducting an Interlaboratory Study to
4
Sample Size, Solvent I, Solvent II, Titrant,
Determine the Precision of a Test Method
Sample g mL mL KOH
3. Significance and Use
Fatty acids 4.0 6 0.05 Isopropyl al- None 0.5N
A
DTO cohol 100
3.1 These test methods are designed to broaden the scope of
Rosin soap
the previous edition of the test method by the inclusion of tall
FA esters 20 6 0.1 Isopropyl al- None 0.1N
cohol 100
1
These test methods are under the jurisdiction of ASTM Committee D-1 on Paint
Rosin 4.0 6 0.05 Toluene 25 Isopropyl al- 0.5N
A
and Related Coatings, Materials, and Applications, and are the direct responsibility CTO cohol 75
of Subcommittee D01.34 on Naval Stores. Pitch
Current edition approved Jan. 10, 1996. Published March 1996. Originally
Rosin esters 10 6 0.1 Toluene 25 Isopropyl al- 0.1N
published as D 465 – 37 T. Last previous edition D 465 – 92.
2
10 6 0.1 g cohol 75
Annual Book of ASTM Standards, Vol 06.03.
3
____________
Annual Book of ASTM Standards, Vol 15.05.
4
A
Annual Book of ASTM Standards, Vol 14.02. DTO represents distilled tall oil, while CTO represents crude tall oil.
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