ASTM D4653-87 (Reapproved 2020) specifies the standard test method for determining total chlorides in leather, particularly mineral tanned leather. The procedure employs a titration technique with silver nitrate to quantify chloride content, essential for quality control and material specification. 🧪…

🔬 Purpose and Significance of Sulfate Basicity This test method, designated D4654‑87 (Reapproved 2020), is issued under the jurisdiction of ASTM Committee D31 on Leather and is the direct responsibility of Subcommittee D31.06 on Chemical Analysis. Its primary scope is…

ASTM D4652-20 establishes the specifications for new polydimethylsiloxane silicone liquid intended for use as an insulating and cooling medium in electrical equipment like transformers, capacitors, and electronic assemblies. This standard is critical for ensuring the safety and reliability of high-voltage…

🧪 Scope and Data Source ASTM D4650-19 provides standard thermophysical property tables for normal butane (n-C₄H₁₀), developed using the National Institute of Standards and Technology Standard Reference Database product REFPROP, version 10.0. These tables are intended for use in calculating…

📜 Standard Overview and Scope ASTM D4651-14 (Reapproved 2020) provides standardized thermophysical property tables for pure isobutane, generated using the NIST REFPROP Version 9.1 database. These tables facilitate the calculation of pressure-volume-temperature (PVT), thermodynamic, and transport properties critical for process…

ASTM D4649-20 provides a comprehensive framework for the selection, specification, and utilization of stretch wrap films for unitizing, reinforcing, and palletizing loads within controlled indoor environments. Developed by ASTM Subcommittee D10.25, this standard guide references a wide array of test…

ASTM D465-15 (Reapproved 2024) specifies standard test methods for determining the acid number of pine chemical products, including tall oil, wood and gum rosin, and related materials. This standard includes both a potentiometric referee method and an internal indicator alternate…

This standard provides standardized test methods for determining the undrained shear strength of saturated fine-grained cohesive soils using a miniature vane shear device in a laboratory setting. It is critical for geotechnical investigations where undisturbed tube samples of clay and…

📐 Overview and Scope of D4647/D4647M The ASTM D4647/D4647M standard presents a direct measurement of the dispersibility and colloidal erodibility of clay soils by causing water to flow through a small hole punched in a specimen. Results are qualitative and…

🔬 Scope and Application of D4645-08 This standard test method, designated D4645-08, covers the determination of the in-situ state of stress in rock using the hydraulic fracturing method. It is the widely accepted field method available for in situ stress…

🧪 Scope and Key Limitations ASTM D4646-16 (Reapproved 2023) defines a standard 24-hour batch-type procedure for determining the sorption affinity of waste solutes by unconsolidated geologic material (soils and sediments) in an aqueous suspension. The waste solute may be derived…

ASTM D4644-16 provides a standardized laboratory procedure for determining the resistance of shales and other similar weak rocks to degradation during combined wetting and mechanical abrasion. This test method yields the Slake Durability Index (Id2), a fundamental geotechnical parameter used…

🎯 Scope and Significance ASTM D4642-04 specifically outlines a reliable wet chemistry method for determining the platinum content in nonzeolitic, fresh reforming catalysts where platinum is the only precious metal present. The test method is validated for the concentration range…

ASTM D4643-17 is a standard test method for determining the water content of soil and rock by microwave oven heating. It provides a faster alternative to conventional oven drying, with specific guidelines for accuracy and significant digits. This method is…

This standard practice, designated D4641-17, provides a computational method for determining pore size distributions in catalysts and catalyst carriers using nitrogen desorption isotherms. The method is based on the Kelvin equation and assumes a cylindrical pore model. It is applicable…

These test methods cover the determination of the saponification number of tall oil and products obtained by fractionation, including rosin, fatty acids, and distilled tall oil, as defined in Terminology D804. They are also applicable to gum and wood rosin.…

📖 Definition and Scope This standard, designated D4640-86 (Reapproved 2022), establishes a test method for determining the stroke cure time of thermosetting phenol-formaldehyde resins. The test method covers the determination of the cure rate at any specified temperature. The stroke…