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Home › Divalent cobalt and manganese salts of 3-carboxy-4-(dihalo-sulfophenylazo)-1-phenylpyrazol-5-ones

Divalent cobalt and manganese salts of 3-carboxy-4-(dihalo-sulfophenylazo)-1-phenylpyrazol-5-ones

US Patent 5476923 · Granted Dec 19, 1995

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