sulphur blackBRN

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sulphur blackBRN
Posting date : Dec 02, 2009
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32-
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Nature: also known as curing or vulcanization Green yuan. Consumption, the largest sulfur dyes. Black powder or fine-grained. Slightly soluble in water. Soluble in sodium sulfide solution into a dark green Leuco. Soluble in hot concentrated sulfuric acid was green blue, black precipitate diluted generated. Is mainly used for dyeing cotton and hemp fibers

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