Tin(II) chloride

Tin(II) chloride
Ball-and-stick model (gas phase).	Space-filling model (gas phase).
Names
	IUPAC names Tin(II) chloride; Tin dichloride
	Other names Stannous chloride; Tin salt; Tin protochloride;
Identifiers
CAS Number	7772-99-8 ; 10025-69-1 (dihydrate) ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:78067 ;
ChemSpider	22887 ;
DrugBank	DB11056;
ECHA InfoCard	100.028.971
EC Number	231-868-0;
E number	E512 (acidity regulators, ...)
PubChem CID	24479;
RTECS number	XP8700000 (anhydrous); XP8850000 (dihydrate);
UNII	R30H55TN67 ; 1BQV3749L5 (dihydrate) ;
UN number	3260
CompTox Dashboard (EPA)	DTXSID8021351 ;
	InChI InChI=1S/2ClH.Sn/h21H;/q;;+2/p-2 Key: AXZWODMDQAVCJE-UHFFFAOYSA-L ; InChI=1/2ClH.Sn/h21H;/q;;+2/p-2 Key: AXZWODMDQAVCJE-NUQVWONBAJ;
	SMILES Cl[Sn]Cl;
Properties
Chemical formula	SnCl2
Molar mass	189.60 g/mol (anhydrous); 225.63 g/mol (dihydrate)
Appearance	White crystalline solid
Odor	odorless
Density	3.95 g/cm3 (anhydrous); 2.71 g/cm3 (dihydrate)
Melting point	247 °C (477 °F; 520 K) (anhydrous) ; 37.7 °C (dihydrate)
Boiling point	623 °C (1,153 °F; 896 K) (decomposes)
Solubility in water	83.9 g/100 ml (0 °C); Hydrolyses in hot water
Solubility	soluble in ethanol, acetone, ether, Tetrahydrofuran ; insoluble in xylene
Magnetic susceptibility (χ)	−69.0·10−6 cm3/mol
Structure
Crystal structure	Layer structure; (chains of SnCl3 groups)
Coordination geometry	Trigonal pyramidal (anhydrous); Dihydrate also three-coordinate
Molecular shape	Bent (gas phase)
Thermochemistry
Std enthalpy of; formation (ΔfH⦵298)	−325 kJ/mol
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Irritant, dangerous for aquatic organisms
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H290, H302+H332, H314, H317, H335, H373, H412
Precautionary statements	P260, P273, P280, P303+P361+P353, P304+P340+P312, P305+P351+P338+P310
NFPA 704 (fire diamond)	3 0 0
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	700 mg/kg (rat, oral); 10,000 mg/kg (rabbit, oral); 250 mg/kg (mouse, oral)
Safety data sheet (SDS)	ICSC 0955 (anhydrous); ICSC 0738 (dihydrate)
Related compounds
Other anions	Tin(II) fluoride; Tin(II) bromide; Tin(II) iodide
Other cations	Germanium dichloride; Tin(IV) chloride; Lead(II) chloride
	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

Tin(II) chloride, also known as stannous chloride, is a white crystalline solid with the formula Sn Cl₂. It forms a stable dihydrate, but aqueous solutions tend to undergo hydrolysis, particularly if hot. SnCl₂ is widely used as a reducing agent (in acid solution), and in electrolytic baths for tin-plating. Tin(II) chloride should not be confused with the other chloride of tin; tin(IV) chloride or stannic chloride (SnCl₄).