Solvay Chemicals Inc. To Raise Prices For Hydrogen Peroxide

HOUSTON — April 2011 — Solvay Chemicals, Inc. will increase off-list prices for all commodity
grades of hydrogen peroxide effective May 1, 2011, or as contracts permit by USD 0.045/lb or CAD
96/mt (100% basis).

Very strong demand at the end of 2010 continued through the first quarter of 2011 bypassing a
traditionally low demand period. This continued demand in the North American market is driving
utilization of plant and transportation assets to very high levels. In addition, transportation
costs continue to increase with the rising costs in fuel and base freight rates.

Solvay Chemicals will maintain the current energy surcharge program. This program remains in
place as long as the NYMEX Henry Hub price for natural gas if $5.00/MMBTU or greater.

Posted on April 1, 2011

Source: Solvay Chemicals