Citroflex™ A-4 Plasticizer (Acetyl Tributyl Citrate)

Our Citroflex™ esters are based on natural citric acid raw material, which is mainly derived from the fermentation of corn. The esters have a long history of use in food and beverage, flavoring, medical, and pharmaceutical applications.

Citroflex™ A-4, also called Acetyltri-n-butyl Citrate (ATBC), is widely used in children’s toys and food contact applications.  It provides many improvements over di-butyl phthalate in cellulose nitrate films, including lower volatility, better resistance to yellowing, and better adhesion to metals.  Citroflex™ A-4 is effective in solution coating both paperboard and foil.  It is an excellent plasticizer for vinyl toys.

Citroflex™ A-4 is also used as plasticizer for bioplastics such as a poly lactic acid, cellulose acetate, and poly hydroxyalkanoic acid.


toddler kid having fun playing with a toy dinosaur, horizontal natural light photo

Children's Toys

No VOCs, no HAPs, and low toxicity make this an ideal plasticizer

Food Wraps & Films

Low volatility, with a resistance to yellowing, and better adhesion to metals 

Ready To Get Started?

Vertellus specializes in developing and producing fine chemicals and intermediates for sophisticated applications that greatly enhance the value of customer end-use products. Market leadership, longevity, and technical expertise afford our professionals great insight into the entire specialty chemicals field.

Contact us today to get your next project started.

Request Technical Data Sheet
Request Safety Data Sheet
This field is for validation purposes and should be left unchanged.

Vertellus Advantage

100+ years of delivering value to our customers​ around the world

Diverse portfolio of solutions in a variety of markets

Global manufacturing footprint and production capabilities