ASTM D6342

ASTM D6342 is the standard practice for polyurethane raw materials and addresses determining the hydroxyl number of polyols by near infrared (NIR) spectroscopy. It is relevant when a faster, instrumental approach is needed to assess a key property used in polyurethane formulation and quality control. By focusing on the hydroxyl number of polyols, the standard helps support more consistent material evaluation and more reliable production decisions in polyurethane-related workflows.

Overview of ASTM D6342

ASTM D6342 provides a practice for measuring the hydroxyl number of polyols using near infrared spectroscopy, a technique commonly used for rapid analytical testing. The standard is centered on polyurethane raw materials, where hydroxyl number is an important characteristic for formulation and performance expectations. As a technical document, it helps align testing practices around a defined instrumental method, supporting more consistent results across laboratories, suppliers, and production settings that handle polyol materials.

Common use cases of ASTM D6342

This standard is commonly used in laboratories and manufacturing environments that evaluate polyols for polyurethane production. It may support incoming material verification, routine quality checks, and process control where hydroxyl number data is needed quickly. ASTM D6342 is also useful in settings that rely on NIR spectroscopy equipment for streamlined testing, helping teams compare material lots and monitor consistency without relying solely on slower traditional approaches.

Benefits of using ASTM D6342

Using ASTM D6342 can improve consistency in how hydroxyl number is determined for polyols, which supports better material control and product evaluation. It may help reduce ambiguity in testing practices and make procurement or supplier comparisons more straightforward. For organizations working with polyurethane raw materials, the standard can support quality control, faster analytical workflows, and lower risk in formulation decisions by providing a recognized method based on NIR spectroscopy.

• Polyol hydroxyl number by NIR spectroscopy
• Polyurethane raw material testing
• Instrumental quality control practice
• Consistent analytical comparison
• Support for supplier and lot evaluation