ISO 2207:1980

Overview

ISO 2207:1980 specifies a standardized method for the determination of the congealing point of petroleum waxes, including petrolatum. The congealing point is a critical property, reflecting the temperature at which a cooled sample of petroleum wax develops enough resistance to flow-essential information for manufacturers and users of petroleum products. This international standard provides a reproducible procedure to determine the congealing characteristics, supporting consistent quality and performance in petroleum waxes.

Key Topics

• Congealing Point Definition: The congealing point is the temperature at which molten petroleum wax ceases to flow, indicating a transition from liquid to solid or semi-solid state.
• Applicable Materials: The standard applies to various petroleum waxes, such as distillate waxes, residual waxes, and petrolatum.
• Procedural Steps: Involves heating the sample, forming a droplet on a thermometer bulb, and controlled cooling until the sample resists flow.
• Apparatus Requirements: Utilizes calibrated equipment including total immersion thermometers and conical flasks, ensuring accuracy and repeatability.
• Precision and Reporting: Provides guidelines for conducting repeat determinations, achieving reliable results, and reporting data with required detail on sample, method reference, and results.

Applications

Implementing ISO 2207:1980 offers practical value across multiple industries using petroleum-derived waxes. Significant applications include:

• Quality Control in Manufacturing: Ensures batch consistency in the production of petroleum waxes, which is vital for product reliability and downstream processing.
• Product Specification Compliance: Enables suppliers and buyers to verify that waxes meet required properties for various end uses, including in candles, coatings, adhesives, and food packaging.
• Research and Development: Supports laboratories and R&D departments in evaluating the formulation and modification of new wax blends and petrolatums based on congealing characteristics.
• Regulatory and Trade Certification: Facilitates clear communication of product characteristics, supporting certification and regulatory compliance in international trade.
• Routine Laboratory Testing: Provides a standardized reference method that laboratories can rely on for consistent, comparable data, especially in comparative studies or quality checks.

Related Standards

The congealing point determination in ISO 2207:1980 complements other standards related to petroleum products and their testing methods, including:

• ISO 6244: Petroleum waxes - Determination of drop melting point, an alternative method often yielding higher congealing point values than those determined by ISO 2207.
• ASTM D938 / IP 76: Similar test procedures referenced for precision data and thermometer specifications.
• General Petroleum Testing Standards: ISO/TC 28 suite, providing a broad foundation for petroleum product analysis and quality control.

Keywords: ISO 2207, congealing point, petroleum waxes, petrolatum, wax testing, quality control, standardization, laboratory methods, product specification, paraffin wax, petroleum products.

By utilizing ISO 2207:1980, laboratories and manufacturers benefit from a reliable, reproducible method to determine the congealing point of petroleum waxes, supporting global consistency and quality in petroleum-based materials.