Mercury oxide - Sankasuigin

[ I ] Mercury(I) oxide: _Hg2O (417.18). When sodium hydroxide is added to an aqueous solution of mercury(I) nitrate, a black powder is obtained. This powder is considered to be a 1:1 mixture of mercury(II) oxide and mercury. Density 9.8 g cm ^-3 . Decomposes at 100 °C. Insoluble in water, soluble in nitric acid and hot acetic acid, insoluble in dilute acid and alkaline aqueous solutions. Toxic. [CAS 15829-53-5] [ II ] Mercury(II) oxide: HgO (216.59). Red (red mercury) and yellow (yellow mercury) are known. Both red and yellow are chemically identical. Density 11.14 g cm ^-3 . The red one has a particle size of 10 to 20 μm, and the yellow one has a particle size of less than 2 μm. If the red one is ground up, it will turn yellow. The red form is obtained by heating mercury(I) nitrate or mercury(II) nitrate, or by directly reacting mercury with oxygen at 300-350 °C. It is used in paints, pigments, paints, ceramics, disinfectants, and analytical reagents. The yellow form is obtained by adding an alkali hydroxide to an aqueous solution of mercury(II) salt. It is used in medicines (ointments for skin diseases) and analytical reagents. Both the red and yellow forms are sparingly soluble in water, soluble in acid, and insoluble in ethanol, acetone, ether, and aqueous alkali solutions. Toxic. [CAS 21908-53-2]

Source: Morikita Publishing "Chemical Dictionary (2nd Edition)" Information about the Chemical Dictionary 2nd Edition

【Ⅰ】酸化水銀(Ⅰ)：Hg₂O(417.18)．硝酸水銀(Ⅰ)の水溶液に水酸化ナトリウムを加えると，黒色の粉末として得られる．この粉末は酸化水銀(Ⅱ)と水銀の1：1混合物とされている．密度9.8 g cm^－3．100 ℃ で分解する．水に不溶，硝酸および熱酢酸に可溶，希酸およびアルカリ水溶液に不溶．有毒．[CAS 15829-53-5]【Ⅱ】酸化水銀(Ⅱ)：HgO(216.59)．赤色(赤ゴウコウ)と黄色(黄ゴウコウ)のものが知られている．赤色，黄色ともに化学的には同一物である．密度11.14 g cm^－3．赤色のものは10～20 μm，黄色のものは2 μm 以下の粒径で，赤色のものをすりつぶすと黄色になる．赤色のものは硝酸水銀(Ⅰ)または硝酸水銀(Ⅱ)を加熱するか，水銀と酸素を300～350 ℃ で直接反応させると得られる．塗料，顔料，ペイント，陶磁器，殺菌剤，分析試薬に用いられる．黄色のものは，水銀(Ⅱ)塩水溶液に水酸化アルカリを加えると得られる．医薬品(皮膚病用軟膏)，分析試薬に用いられる．赤色体，黄色体のいずれも水に難溶，酸に可溶，エタノール，アセトン，エーテル，アルカリ水溶液に不溶．有毒．[CAS 21908-53-2]

出典　森北出版「化学辞典（第2版）」化学辞典 第2版について　情報