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Mercury(I) nitrate is a chemical compound with the formula Hg2(NO3)2. It is used in the preparation of other mercury(I) compounds, and is toxic.

Mercury(I) nitrate[1][2] Mercury(I)-nitrate.png Names IUPAC name Mercury(I) nitrate Other names Mercurous nitrate Identifiers CAS Number 10415-75-5 (anhydrous) Yes 14836-60-3 (dihydrate) ECHA InfoCard 100.166.349 EC Number 233-886-4 PubChem CID 25247 UNII J78005WL7R (anhydrous) Z92K1EV5HQ (dihydrate) Properties Chemical formula Hg2(NO3)2 (anhydrous) Hg2(NO3)2·2H2O (dihydrate) Molar mass 525.19 g/mol (anhydrous) 561.22 g/mol (dihydrate) Appearance white monoclinic crystals (anhydrous) colorless crystals (dihydrate) Density ? g/cm3 (anhydrous) 4.8 g/cm3 (dihydrate) Melting point ? (anhydrous) decomposes at 70 °C (dihydrate) Solubility in water slightly soluble, reacts Magnetic susceptibility (χ) −27.95·10−6 cm3/mol Hazards NFPA 704 NFPA 704 four-colored diamond 131OX Related compounds Other anions Mercury(I) fluoride Mercury(I) chloride Mercury(I) bromide Mercury(I) iodide Other cations Mercury(II) nitrate