With over 30 years of experience, TDC, LLC (TDC) is recognized as the largest producer of sodium hydrosulfide (NaHS). In addition, TDC markets and supplies logistic management for caustic soda (NaOH). TDC is committed to helping businesses succeed by providing quality products, excellent service, readily available technical support and expertise from engineering resources. These commitments are evident in the resulting long-term relationships TDC has formed with a diverse, international customer base. TDC markets logistics assets for both NaHS and NaOH.