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Tungsten(VI) oxide, also known as tungsten trioxide or tungstic anhydride, WO3.
T 2525 (OTTO) Tungsten(VI) oxide Cas 1314-35-8 - used in tungsten and tungstate manufacturing which are used as X-ray screens and for fire proofing fabrics. T 2525 (OTTO) Tungsten(VI) oxide Cas 1314-35-8 - used as a ceramic pigment.