ASTM D2414-25 PDF
Name in English:
St ASTM D2414-25
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Ст ASTM D2414-25
Original standard ASTM D2414-25 in PDF full version. Additional info + preview on request
Full title and description
ASTM D2414-25 — Standard Test Method for Carbon Black—Oil Absorption Number (OAN). This standard defines the procedure, apparatus, and reporting requirements for determining the oil absorption number of carbon black, a measure used to assess the absorptive properties of carbon black relevant to rubber compounding and processing.
Abstract
ASTM D2414-25 specifies a laboratory test to determine the Oil Absorption Number (OAN) of carbon black by dispersing a measured mass of carbon black into a specified test oil using an absorptometer and recording the end‑point. The OAN is used as an indicator of surface activity and particle structure that affect processing, mixing, and final vulcanizate properties. The procedure includes requirements for sample preparation, test oils, apparatus calibration, end‑point determination, calculation, and reporting.
General information
- Status: Active
- Publication date: June 15, 2025
- Publisher: ASTM International
- ICS / categories: 71.060.10 (Inorganic chemicals; carbon black and related tests)
- Edition / version: D2414-25 (2025)
- Number of pages: 10
Scope
This test method covers the determination of the oil absorption number of carbon black. It establishes the sample handling and preparation, acceptable test oils (including commonly used paraffin oils and alternatives), the absorptometer types and settings, the end‑point criteria, calculation of the OAN value, and the format for reporting results. The standard is intended for laboratory quality control, product characterization, and research use in the carbon black and rubber industries.
Key topics and requirements
- Definition and significance of Oil Absorption Number (OAN) as a measure of carbon black absorptive capacity and structure.
- Required apparatus: absorptometer (examples: Brabender-type or modern load-cell instruments), mixing geometry, and torque/endpoint detection parameters.
- Specified test oils and accepted alternatives (paraffin oils commonly used; mentions of epoxidized fatty‑acid ester (EFA) and historical reference to n‑dibutyl phthalate (DBP) and considerations for its restricted use).
- Sample mass, mixing procedure, temperature control, and timing to achieve reproducible end‑points.
- End‑point determination (fixed torque or change in torque) and calculation method for reporting OAN.
- Precision, repeatability, and reporting requirements (units, significant figures, and any statements on uncertainty).
- Safety and environmental notes regarding handling of oils and any solvents or phthalates historically referenced in the method.
Typical use and users
This standard is used by carbon black manufacturers, rubber compounding and mixing laboratories, quality control and QC technicians, R&D scientists, test laboratories, and standards bodies. Typical applications include incoming raw material acceptance, batch-to-batch quality control, product specification verification, and research into carbon black structure–property relationships that affect processing and vulcanizate performance.
Related standards
Commonly referenced or related ASTM standards include, but are not limited to: D3493 (COAN — Oil Absorption Number of Compressed Sample), D1510 (Iodine Adsorption Number), D3265 (Tint Strength), D6556 (total and external surface area by nitrogen adsorption), and other D24 series test methods for carbon black surface and absorptive properties. D2414-25 is part of the D2414 series and replaces earlier editions such as D2414-23a.
Keywords
carbon black, oil absorption number, OAN, absorptometer, paraffin oil, epoxidized fatty‑acid ester (EFA), n‑dibutyl phthalate (DBP), rubber compounding, quality control, D24 committee, ASTM D2414-25
FAQ
Q: What is this standard?
A: ASTM D2414-25 is the ASTM test method that specifies how to determine the Oil Absorption Number (OAN) of carbon black using an absorptometer and a specified test oil.
Q: What does it cover?
A: It covers sample preparation, apparatus and calibration, acceptable test oils, the mixing procedure and end‑point determination, calculation of the OAN value, and reporting and safety considerations.
Q: Who typically uses it?
A: Carbon black manufacturers, rubber compounders, independent testing laboratories, R&D groups, and quality control personnel use this method to characterize carbon black and control product quality.
Q: Is it current or superseded?
A: It is current (active). The D2414-25 edition (2025) is the latest edition and supersedes earlier editions such as D2414-23a.
Q: Is it part of a series?
A: Yes. D2414-25 is part of the ASTM D2414 series of OAN test methods and belongs to the broader D24 committee work on carbon black and related ASTM test methods (volume 09.01).
Q: What are the key keywords?
A: Key keywords include: carbon black, oil absorption number (OAN), absorptometer, paraffin oil, EFA, DBP, rubber compounding, quality control, D24.