ASTM D4274

ASTM D4274 is a technical standard focused on testing polyurethane raw materials, specifically the determination of hydroxyl numbers of polyols. It provides a recognized framework for measuring an important chemical property used to characterize polyol materials. That matters because hydroxyl number data can support product comparison, formulation decisions, and quality checks in polyurethane-related work. For buyers and labs, this standard helps define a common testing approach for consistent, defensible results.

ASTM D4274 standard overview

ASTM D4274, Standard Test Methods for Testing Polyurethane Raw Materials: Determination of Hydroxyl Numbers of Polyols, addresses a key analytical measurement for polyol raw materials. The standard is used as a technical reference for evaluating hydroxyl numbers, which are commonly used to help describe polyol functionality and suitability in polyurethane applications. As an ASTM standard, it supports repeatable testing practice and clearer communication between suppliers, laboratories, and users of polyurethane raw materials.

Where is ASTM D4274 used?

This standard is commonly used in laboratories and quality control settings that work with polyurethane raw materials, especially polyols. It is relevant when testing incoming materials, verifying supplier data, or checking batch-to-batch consistency before materials are used in formulation. ASTM D4274 may also be useful in research, development, and production environments where hydroxyl number data is needed to support material selection or product evaluation for polyurethane systems.

Practical importance of ASTM D4274

ASTM D4274 matters because hydroxyl number results can influence how polyols are specified, compared, and accepted for use. A recognized test method helps reduce ambiguity in procurement and quality control, making it easier to confirm whether a material meets expected technical requirements. It can also support compliance workflows and lower the risk of inconsistent test data when multiple parties are involved in material evaluation or supply chain review. For many users, it serves as a dependable reference for routine analysis.

• Hydroxyl number determination for polyols
• Polyurethane raw material testing reference
• Quality control and batch verification
• Supplier data comparison and acceptance
• Technical support for formulation decisions