Citrate esters offer a non-phthalate route

Plasticizers increase polymer flow, making materials easier to process and giving finished products the required flexibility. Traditional phthalate plasticizers such as DEHP have been widely used because of their low cost and stable performance, but toxicity and migration concerns have drawn sustained scrutiny.

Citrate ester plasticizers are described as free of phthalates and as having low toxicity, high flash points and rapid biodegradability. Those properties make them relevant to demanding medical and food-contact standards, where safety and compliance requirements are strict.

Technical profile of the Citroflex range

The Citroflex range is designed for use across multiple polymer systems. Its flexibility stems from a chemical structure that allows formulators to select hydrophilic or lipophilic esters, depending on the physical properties required in the final product.

Product information cites compatibility, stability and environmental performance as central characteristics of the range.

Performance in PVC and other polymers

In polyvinyl chloride (PVC) systems, citrate esters are presented as having strong replacement potential. The materials are described as providing tensile strength and elongation comparable to conventional plasticizers while significantly reducing migration and volatility.

For products such as medical tubing and food-packaging film, those characteristics are intended to help maintain stable physical performance over longer use and reduce the risk associated with additive migration.

The range is also intended for use in other polymer systems where formulators require non-phthalate plasticization and good compatibility with the resin matrix.

Key applications and compliance considerations

Citroflex materials are used in applications where biological safety and regulatory compliance are central requirements.

• Food packaging: Food-contact films and plastic containers, with compliance cited for FDA standards.
• Medical devices: Medical catheters, infusion tubing and other products with high safety requirements.
• Children's products: Vinyl resins used in toys, where contact safety is a key consideration.

Across these uses, the appeal of citrate esters lies in their non-phthalate status and their ability to support formulations that must meet strict end-use standards. Formulators evaluating a switch are expected to consider resin grade, additive interactions and the specific regulatory requirements of the final product.