ASTM E2470-22 PDF

Overview

ASTM E2470-22: Standard Specification for Polyester Grade Ethylene Glycol defines the requirements for high-quality ethylene glycol used in polyester production and other industrial applications. This standard, developed and maintained by ASTM International, specifies the chemical and physical characteristics, as well as the necessary testing methods, to ensure consistent product quality and safety. Compliance with this specification supports manufacturers, suppliers, and end-users in verifying the purity and suitability of polyester grade ethylene glycol for critical processes.

Key Topics

• Purity and Impurity Limits: The specification sets minimum content requirements for ethylene glycol and maximum allowable levels for impurities such as diethylene glycol, aldehydes (as acetaldehyde), iron, chlorides, and water. Strict impurity control supports product performance and downstream process efficiency.
• Physical Properties: Requirements include tests for appearance (clear and free from suspended matter), color on the Platinum-Cobalt (Pt-Co) scale, distillation range (initial boiling and dry points), ash content, relative density, and water miscibility.
• Analytical Methods: The standard references established ASTM test methods for each property-ensuring reliable and standardized testing, including methods for:
  • Ash content (D482)
  • Distillation characteristics (D1078, D850)
  • Color (D1209, D5386, D8005)
  • Water content (E1064)
  • UV transmittance (E2193)
  • Glycol purity and impurities (E2409)
  • Aldehyde content (E2313)
  • Iron determination (E394, E1615)
  • Chloride content (E2469)
  • Acidity (E2679)
• Sampling and Packaging: Guidelines are included for representative sampling of ethylene glycol and requirements for packaging, labeling, and transportation in compliance with applicable regulations.
• Safety and Compliance: Emphasizes the review of current Safety Data Sheets (SDS) for guidance on toxicity, handling, and environmental protection. Users are responsible for implementing appropriate safety measures and aligning with relevant regulatory requirements.

Applications

Polyester grade ethylene glycol manufactured in compliance with ASTM E2470-22 is critical for:

• Polyester Resin Production: Used as a key raw material in the manufacture of polyethylene terephthalate (PET) for fibers, films, and packaging materials.
• Industrial Solvents: Utilized in the preparation of resins and chemical intermediates where chemical purity is essential.
• Antifreeze and Coolants: Suitable for formulations requiring high-purity ethylene glycol to ensure low impurity levels and optimal performance.
• Pharmaceutical and Cosmetic Ingredients: Applied where material purity and consistency are mandatory for product safety and efficacy.

Adopting this specification minimizes the risk of process disruption, enhances product quality, and helps meet end-user requirements across various industries.

Related Standards

Organizations adhering to ASTM E2470-22 may also reference complementary standards for testing and quality assurance, such as:

• ASTM D1209: Test Method for Color of Clear Liquids (Pt-Co Scale)
• ASTM D4052: Test Method for Density, Relative Density, and API Gravity by Digital Density Meter
• ASTM D1078/D850: Test Methods for Distillation Range
• ASTM E1064: Water in Organic Liquids by Coulometric Karl Fischer Titration
• ASTM E300: Practice for Sampling Industrial Chemicals
• ASTM E394/E1615: Test Methods for Iron Determination
• ASTM E2409: Test Method for Glycol Impurities

By implementing ASTM E2470-22 and related standards, organizations ensure reliable supply and consistent performance of polyester grade ethylene glycol in demanding industrial environments.