ASTM D1510-25 PDF

Full title and description

St ASTM D1510-25 — Standard Test Method for Carbon Black — Iodine Adsorption Number. This standard specifies procedures for measuring the iodine adsorption number (iodine number) of carbon black using two alternative procedures: Method A (manual titration with starch indicator) and Method B (automated/potentiometric titration). The iodine adsorption number is used to characterize carbon black surface area and related surface properties for quality control, specification, and research.

Abstract

ASTM D1510-25 establishes accepted laboratory procedures to determine the iodine adsorption number of carbon blacks. The document describes sample preparation, reagents, apparatus, detailed step-by-step test methods (Method A and Method B), calculation of the iodine number, recommended reference materials for standardization and control, and precision/accuracy guidance. The method alerts users to factors that influence results (volatiles, extractables, aging) and gives recommendations for daily monitoring using stable reference materials.

General information

• Status: Active
• Publication date: January 6, 2025 (technical release); last updated July 14, 2025.
• Publisher: ASTM International
• ICS / categories: 83.040.20 (Rubber compounding ingredients)
• Edition / version: D1510-25
• Number of pages: 11

Scope

This test method covers the determination of the iodine adsorption number of carbon black. It includes two alternative methods: Method A (original/manual titration procedure) and Method B (alternate automated/potentiometric procedure). The standard applies to routine quality control and comparative testing where iodine adsorption is used as an indicator of surface area or in material specifications, with guidance on normalization, reference materials, and recognized limitations (for example, effects of volatile material or aging on the iodine number).

Key topics and requirements

• Two test procedures: Method A (manual titration with starch indicator) and Method B (automated/potentiometric titration).
• Detailed sample preparation and handling to minimize artifacts (drying, avoidance of contamination, handling of volatiles).
• Required reagents and apparatus (iodine solution preparation, titrants, burettes or automated titrators, centrifuge, volumetric glassware).
• Calculation formula for iodine adsorption number and reporting conventions (SI units).
• Use of certified/stable iodine-number reference materials for daily control and normalization procedures.
• Precision and bias statements and recommended quality-control charts (x-charts) to monitor method performance.
• Safety, health and environmental cautions related to reagents and sample handling.

Typical use and users

ASTM D1510-25 is used by carbon black manufacturers, rubber compounding producers, quality control laboratories, third-party testing services, and research laboratories. Typical applications include incoming material inspection, production control, specification verification for grades of carbon black used in tires, rubber goods, plastics, coatings and inks, and comparative testing for product development and troubleshooting.

Related standards

Commonly referenced and related standards include ISO 1304 (Determination of iodine adsorption number — comparable international method), ASTM D2414 (n-dibutyl phthalate absorption number, DBP), ASTM D1513 (Pour density of pelletized carbon black), ASTM D1514 (Sieve residue), ASTM D1509 (Loss on heating), ASTM D1512 (pH), ASTM D3265 (Tint strength), ASTM D6556 (NSA/STSA surface area methods), and ASTM D4821 (guidance on validation and interlaboratory control for carbon black tests).

Keywords

carbon black, iodine adsorption number, iodine number, surface area, titration, potentiometric titration, Method A, Method B, ASTM D1510-25, quality control, reference materials

FAQ

Q: What is this standard?

A: ASTM D1510-25 is a standardized laboratory test method for determining the iodine adsorption number of carbon black, which is an indicator related to surface area and surface chemistry.

Q: What does it cover?

A: It covers two procedures (manual titration and automated/potentiometric titration), sample preparation, required apparatus and reagents, calculation of iodine number, use of reference materials for normalization/control, and precision/accuracy guidance.

Q: Who typically uses it?

A: Carbon black producers, rubber and tire manufacturers, QC/analytical laboratories, materials researchers, and standards laboratories use D1510 to characterize and control carbon black products.

Q: Is it current or superseded?

A: It is current and active. The latest published edition is D1510-25 (issued in 2025; technical release January 6, 2025, with a recorded update on July 14, 2025).

Q: Is it part of a series?

A: D1510 is part of a suite of ASTM standards covering carbon black properties and testing under Committee D24 (Carbon Black), which includes related methods for DBP absorption, pour density, sieve residue, pH, heating loss, tint, and surface area (e.g., D2414, D1513, D1514, D1512, D1509, D3265, D6556).

Q: What are the key keywords?

A: carbon black, iodine adsorption number, iodine number, surface area, titration, potentiometric, Method A, Method B, quality control.