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Offered by Spolana
A solution of sulphur trioxide in sulphuric acid; the sulphur trioxide concentration is a minimum of 25%; used in the chemical industry.
Tested according to
Volume of sulfuric acid (H2SO4)
Free sulphur trioxide content (SO3)
25 – 32
Colour (Hazen), max.
Opacity at 560 nm, max.
Iron (Fe), max.
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