英语词汇“chrome alum”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	chrome alum
释义	chrome alum noun : an alum in which chromium is the trivalent metal; especially : potassium chromium sulfate KCr(SO₄)₂.12H₂O obtained as dark purple crystals by treating potassium dichromate with sulfur dioxide and used in tanning, as a mordant, and as a hardening agent for gelatin in photography
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