ASTM D8618-25

1.1 This standardized test method will determine the percentage disintegration of a compostable item under in-field composting conditions.

1.2 This test method is intended to be used on materials which meet the criteria of internationally recognized compostability standard specifications (e.g., Specifications D6400, D6868, and D8410, ISO 17088, etc.).

1.3 This test method produces a result of percent disintegration by weight and by surface area, and defines the boundaries for validity of a disintegration test. This standardized test method is appropriate for facilities operating within in-field operating conditions (e.g., C:N, moisture, pH, bulk density, oxygen, residence time, temperature, available oxygen, etc.), which are relevant regardless of composting facility type and size, based on best practices established in The Composting Handbook.2 See Section 7, Sampling and Test Conditions.

1.4 The field test period is intended to represent the full duration of a composting process at a given facility, from receipt of raw feedstocks through transformation to mature and stable compost.

1.5 The values stated in SI units are to be regarded as standard. Other units used for information or calculation shall be converted to SI.

1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.