Mercury(I) nitrate

Mercury(I) nitrate
Names
	IUPAC name Mercury(I) nitrate
	Other names Mercurous nitrate
Identifiers
CAS Number	(anhydrous): 10415-75-5 ; (dihydrate): 14836-60-3 ;
3D model (JSmol)	(anhydrous): Interactive image; (dihydrate): Interactive image;
ChemSpider	(anhydrous): 23580; (dihydrate): 9493944;
ECHA InfoCard	100.202.814
EC Number	(anhydrous): 233-886-4;
PubChem CID	(anhydrous): 25247;
UNII	(anhydrous): J78005WL7R ; (dihydrate): Z92K1EV5HQ ;
UN number	1627
CompTox Dashboard (EPA)	(anhydrous): DTXSID30163975 ;
	InChI (anhydrous): InChI=1S/Hg.NO3/c;2-1(3)4/q+1;-1 Key: DRXYRSRECMWYAV-UHFFFAOYSA-N; (dihydrate): InChI=1S/2Hg.2NO3.2H2O/c;;22-1(3)4;;/h;;;;21H2/q2+1;2-1;; Key: LSABZDVKJBWCBE-UHFFFAOYSA-N;
	SMILES (anhydrous): [N+](=O)([O-])[O-].[Hg+][Hg+].[N+](=O)([O-])[O-]; (dihydrate): [N+](=O)([O-])[O-].[OH2+][Hg][Hg][OH2+].[N+](=O)([O-])[O-];
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
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H300, H310, H330, H373, H410
Precautionary statements	P260, P262, P264, P270, P271, P273, P280, P284, P301+P316, P302+P352, P304+P340, P316, P319, P320, P321, P330, P361+P364, P391, P403+P233, P405, P501
NFPA 704 (fire diamond)	3 1 1 OX
Related compounds
Other anions	Mercury(I) fluoride; Mercury(I) chloride; Mercury(I) bromide; Mercury(I) iodide
Other cations	Mercury(II) nitrate
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Mercury(I) nitrate is an inorganic compound, a salt of mercury and nitric acid with the formula Hg₂(NO₃)₂. A yellow solid, the compound is used as a precursor to other Hg₂²⁺ complexes. The structure of the hydrate has been determined by X-ray crystallography. It consists of a [H₂O-Hg-Hg-OH₂]²⁺ center, with a Hg-Hg distance of 254 pm.

It was first mentioned by Indian chemist Acharya Prafulla Chandra Ray in 1896.