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Updated: October 20, 2026
Heated in a reduction-tube Melts, boils, is volatilized, and forms a white crystalline sublimate. 5. With ether Freely soluble; the ethereal solution, when allowed to evaporate spontaneously, deposits the salt in white prismatic crystals. 6. Heated with carbonate of Globules of metallic mercury are sodium in a reduction-tube produced.
If this foil be dried, cut up, put in a reduction-tube, and heated, crystals of arsenious trioxide will be deposited on the cold part of the tube. These tests are difficult to apply, but as arsenic is a ubiquitous poison, and as there are many sources of fallacy, it would be well, when possible, to obtain the services of an expert. Biological Test.