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New ASTM Standard Tests and Supports Biodegradability of Plastics in Water


Laboratories will soon be able to use a new ASTM International standard to test and better understand biodegradability of plastics in marine environments. The new standard (soon to be published as D7991, Test Method for Determining Aerobic Biodegradation of Plastics Buried in Sandy Marine Sediment Under Controlled Laboratory Conditions) provides ways to simulate how plastics degrade in seawater-soaked sand.

According to ASTM member Francesco Degli Innocenti, the recent discovery of major contamination in the oceans has heightened interest in the biodegradability of plastics.

“The environment cannot cope with massive littering, whether it’s biodegradable or not,” says Innocenti, director, ecology of products and environmental communication, Novamont. “However, there are certain products prone to being lost at sea – such as fishing gear – that could have much less environmental impact by being made with plastics that biodegrade quickly in that environment.”

The standard will provide specific test methods that determine biodegradation rates in different marine habitats simulated in laboratories. Such tests will help establish parameters to develop plastics that ensure faster biodegradation. The standard will also advance the understanding of biodegradation when unexpected or uncontrolled releases of plastics occur.

All interested parties are invited to join in the standards developing activities of Subcommittee D20.96 on Environmentally Degradable Plastics and Biobased Products. In addition to continuing work on standards for biodegradation in water, the subcommittee is working on proposed standards for biodegradation in soil.

To purchase standards, visit and search by the standard designation, or contact ASTM Customer Relations (tel +1.877.909.ASTM; ASTM welcomes participation in the development of its standards. Become a member at

ASTM Committee D20 on Plastics Next Meeting: Nov. 15-18, 2015, November Committee Week, Tampa, Fla.
Media Inquiries: Nathan Osburn, tel +1.610.832.9603;
Technical Contact: Francesco Degli Innocenti, Novamont, Novara, Italy, tel +39.0321.699.606;
ASTM Staff Contact: Alyson Fick, tel +1.610.832.9710;

Release #9908


September 15, 2015

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