ASTM D465-25 PDF
Name in English:
St ASTM D465-25
Name in Russian:
Ст ASTM D465-25
Original standard ASTM D465-25 in PDF full version. Additional info + preview on request
Full title and description
Standard Test Methods for Acid Number of Pine Chemical Products Including Tall Oil and Other Related Products — test procedures for measuring the acid number (expressed as mg KOH/g) of pine chemical products such as tall oil, wood rosin and gum rosin, using potentiometric and internal-indicator titration techniques.
Abstract
This standard defines two test methods for determining the acid number of pine-chemical / naval-stores products: a potentiometric method (referee) suitable for light- and dark-colored products, and an internal-indicator (visual) method (alternate) suitable for light- to medium-colored products (Gardner color < 12). Values are stated in SI units and the standard includes scope, applicability, and user-responsibility safety notes.
General information
- Status: Active (current ASTM publication).
- Publication date: 1 November 2025 (designated ASTM D465-25).
- Publisher: ASTM International.
- ICS / categories: 87.060.20 (Binders / Pine chemicals and related products).
- Edition / version: ASTM D465-25 (2025).
- Number of pages: 4 pages (short test-method specification).
Scope
These test methods are intended for determining the acid number of pine chemical products (as defined in Terminology D804) including tall oil products, wood rosin and gum rosin, and other related materials. The standard covers a potentiometric (referee) procedure appropriate for both light- and dark-colored materials and an internal indicator (alternate) procedure for lighter colored products, and notes limitations for certain modified rosins. Users are reminded to observe appropriate safety, health and environmental practices when performing the tests.
Key topics and requirements
- Potentiometric titration procedure (referee method) suitable for light- and dark-colored pine-chemical products; treated as the referee determination.
- Internal-indicator titration (alternate method) for light- and medium-colored products (Gardner color limit noted).
- Applicable sample types: tall oil, tall oil fatty acids, wood rosin, gum rosin, and many related pine-chemical derivatives (with stated exceptions for certain modified products).
- Reporting in SI units (mg KOH per gram of sample) and clear statement of method applicability and limitations.
- Reference to industry terminology (Terminology D804) for definitions and to related analytical procedures (e.g., potentiometric titration methods in other ASTM standards).
- User responsibility statements covering safety, health, environmental practices and regulatory applicability.
Typical use and users
Used by quality-control and analytical laboratories in the pine-chemicals, rosin and tall-oil industries; by manufacturers, suppliers and purchasers of pine-chemical products for product specification and acceptance testing; and by research and regulatory bodies concerned with chemical characterization of tall oil and rosin derivatives. Laboratories performing acid-number determinations will choose the potentiometric method for dark or challenging samples and the internal-indicator method for suitably light-colored materials.
Related standards
Terminology D804 (Terminology Relating to Pine Chemicals) is referenced for definitions and sample classification; other related ASTM methods for acid-number or compositional testing (for example, potentiometric acid-number methods for petroleum products such as D664 and pine-chemical methods such as D1065 for unsaponifiable matter) are often used alongside D465 in laboratory practice.
Keywords
acid number, total acid number, pine chemicals, tall oil, rosin, tall oil fatty acids, potentiometric titration, internal indicator titration, Gardner color, pine-chemical testing.
FAQ
Q: What is this standard?
A: ASTM D465-25 is the ASTM test-method standard for determining the acid number of pine chemical products (including tall oil and rosin) using potentiometric and internal-indicator titration techniques.
Q: What does it cover?
A: It covers two procedures: a potentiometric (referee) method appropriate for light- and dark-colored materials and an internal-indicator (alternate) method for light- to medium-colored materials (with a Gardner-color limitation); it specifies units, applicability, and user safety/responsibility notes.
Q: Who typically uses it?
A: Producers, quality-control and analytical laboratories in the pine-chemicals and tall-oil industries, purchasers and specification writers, and research or regulatory laboratories assessing acid-content and product quality.
Q: Is it current or superseded?
A: As published on 1 November 2025 the designation ASTM D465-25 is the current issue; it updates earlier editions (for example D465-15 and prior revisions). The revision was part of an ASTM work item to review and update D465.
Q: Is it part of a series?
A: Yes — it is part of the suite of ASTM standards overseen by Committee D01 (Subcommittee D01.34) addressing pine chemicals and related test methods; it cross-references Terminology D804 and other pine-chemical test methods.
Q: What are the key keywords?
A: Acid number, tall oil, rosin, pine chemicals, potentiometric titration, internal indicator, Gardner color, mg KOH/g.