Caustic soda diaphragm, purified, and membrane manufactured by OxyChem at Battleground (Houston), TX; Convent, LA; Geismar, LA and Wichita KS is certified kosher and parve for year round use.

Kosher certificates are available for the following plants and terminals:

NSF Certification

OxyChem's caustic soda (NaOH), liquid is certified by NSF International to comply with NSF/ANSI Standard 60 when used to treat drinking water.

Click here for a list of certified locations.

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	Hydrogen - a by-product of caustic soda