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Certificate of
Analysis
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Appearance: light yellow powder; Assay: (HPLC) 99.9%;
Identification: (IR) conforms; Residue after ignition: 0.1%; Suitability: in
the synthesis of water-soluble anthraquinone derivatives such as
9,10-anthraquinone-2,6-disulfonic acid disodium salt and
9,10-anthraquinone-2-sulfonic acid monosodium salt, useful as redox catalysts
for aeration in Becher process, as an indicator to determine the acid
strength of poly(4-vinylpyridinium) hydrogen sulfate, also as a pulping
catalyst; Retest: 01/25;
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