Singapore, May 19, 2010 – Today’s lifestyle, fashion trends and concern for health and the environment have
raised the demand for colorful wear with very high fastness properties. TERASIL®W-EL is an innovative and
unique range of disperse dyes which achieves the highest wash fastness on polyester/elastane blends through
reliable process and outstanding performance.

This practice proven dye range excels with its brilliant build-up. Already at 125° C, the build-up and exhaustion is
outstanding. Small variations in time and temperature do not cause differences in exhaustion, making for
excellent reproducibility which equates to right first time. All of this over the full color spectrum. Colors, however
are only as good as they last, and one of the latest innovations in the TERASIL® W-EL dye range, based on
innovative phtalimide azo chemistry, supports achieving fantastic wash fastness even under severe washing
conditions. The process to achieve these results is simple and reliable as dyeing at only 125°C for a minimum
time avoids damaging the elastane for better quality and greater comfort.

For the huge sportswear market, where color and fastness demands are enormous, TERASIL ®W-EL is the
disperse dye range that delivers. With its simple and reliable process dyers now have the ability to ensure that
they can offer a wide range of colors in very good quality; fastness that meets the highest requirements; super
reproducibility and thanks to excellent build-up and minimal fiber damage there are fewer complaints and higher
profits.

About Huntsman:
Huntsman is a global manufacturer and marketer of differentiated chemicals. Its operating companies
manufacture products for a variety of global industries, including chemicals, plastics, automotive, aviation,
textiles, footwear, paints and coatings, construction, technology, agriculture, health care, detergent, personal
care, furniture, appliances and packaging. Originally known for pioneering innovations in packaging and, later,
for rapid and integrated growth in petrochemicals, Huntsman today has more than 11,000 employees and
operates from multiple locations worldwide. The Company had 2009 revenues of approximately $8 billion.
For more information about Huntsman, please visit the Company’s website at www.huntsman.com.

Forward Looking Statements:
Statements in this release that are not historical are forward-looking statements. These statements are based on
management’s current beliefs and expectations. The forward-looking statements in this release are subject to
uncertainty and changes in circumstances and involve risks and uncertainties that may affect the company’s
operations, markets, products, services, prices and other factors as discussed in the Huntsman companies’
filings with the U.S. Securities and Exchange Commission. Significant risks and uncertainties may relate to, but
are not limited to, financial, economic, competitive, environmental, political, legal, regulatory and technological
factors. In addition, the completion of any transactions described in this release is subject to a number of
uncertainties and closing will be subject to approvals and other customary conditions. Accordingly, there can be
no assurance that such transactions will be completed or that the company’s expectations will be realized. The
company assumes no obligation to provide revisions to any forward-looking statements should circumstances
change, except as otherwise required by applicable law