Medium |
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| perchlorethylene |
 |
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| petroleum ether |
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 |
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| phenol |
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|
 |
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| phenyl ether |
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| phenyl hydrazine |
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| phosphoric acid |
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| phthalic acid anhydride |
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| potassium salts, aqueous solution * |
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| pyridine |
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* Salts are:
nitrates, nitrites, sulphates, sulphides, chlorides, acetates, tartrates, cyanides, phosphates, oxalates, etc.
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