For release at 07.00, 22^nd December 2021

Itaconix plc

("Itaconix" or the "Company")

First Order for New Use in Sustainable Fashion

Itaconix (AIM: ITX) (OTCQB: ITXXF), a leading innovator in plant-based specialty polymers used as essential ingredients in everyday consumer products, is pleased to announce the first customer order in a new potentially major application for its Itaconix® DSP 2K™ polymer.

The new customer is a leading European supplier to companies that produce materials for the fashion and related industries. As a plant-based alternative to fossil-based polymers currently used in the production process, the Itaconix polymer is expected to create new opportunities for consumers to buy more sustainable products.

John R. Shaw, CEO of Itaconix, said:

"We see broader application potential for our Itaconix® DSP 2K™ polymer beyond its current use in detergents. Although this is a small order for initial production for end customer sampling, this new application validates the opportunity for our plant-based polymers to set new standards for performance and sustainability in an emerging generation of consumer products."

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About Itaconix

Itaconix uses its proprietary plant-based polymer technology platform to produce and sell specialty ingredients that improve the safety, performance, and sustainability of consumer products. The Company's current ingredients are enabling and leading new generations of products in detergents, hygiene, and hair care. Itaconix's contributions to the global low carbon economy are recognised by the London Stock Exchange's Green Economy Mark.

www.itaconix.com