Zinc chloride

Zinc chloride
	; Tetrahydrate
Names
	IUPAC name Zinc chloride
	Other names Butter of zinc; Neutral zinc chloride (1:2); Zinc bichloride (archaic); Zinc(II) chloride;
Identifiers
CAS Number	7646-85-7 Anhydrous ; 29426-92-4 Tetrahydrate ; 21351-91-7 Mixed hydrate ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:49976 ;
ChEMBL	ChEMBL1200679 ;
ChemSpider	5525 ;
DrugBank	DB14533;
ECHA InfoCard	100.028.720
EC Number	231-592-0;
PubChem CID	3007855;
RTECS number	ZH1400000;
UNII	86Q357L16B ;
UN number	2331
CompTox Dashboard (EPA)	DTXSID2035013 ;
	InChI InChI=1S/2ClH.Zn/h21H;/q;;+2/p-2 Key: JIAARYAFYJHUJI-UHFFFAOYSA-L ; InChI=1/2ClH.Zn/h21H;/q;;+2/p-2 Key: JIAARYAFYJHUJI-NUQVWONBAB;
	SMILES Cl[Zn]Cl;
Properties
Chemical formula	ZnCl2
Molar mass	136.315 g/mol
Appearance	White hygroscopic and very deliquescent crystalline solid
Odor	odorless
Density	2.907 g/cm3
Melting point	290 °C (554 °F; 563 K)
Boiling point	732 °C (1,350 °F; 1,005 K)
Solubility in water	432.0 g/(100 g) (25 °C)
Solubility	soluble in ethanol, glycerol and acetone
Solubility in ethanol	430.0 g/(100 ml)
Magnetic susceptibility (χ)	−65.0·10−6 cm3/mol
Structure
Coordination geometry	Tetrahedral, linear in the gas phase
Pharmacology
ATC code	B05XA12 (WHO)
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Moderately toxic, irritant
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H302, H314, H410
Precautionary statements	P273, P280, P301+P330+P331, P305+P351+P338, P308+P310
NFPA 704 (fire diamond)	3 0 0
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	350 mg/kg (rat, oral); 350 mg/kg (mouse, oral); 200 mg/kg (guinea pig, oral); 1100 mg/kg (rat, oral); 1250 mg/kg (mouse, oral);
LC50 (median concentration)	1260 mg/m3 (rat, 30 min); 1180 mg-min/m3
	NIOSH (US health exposure limits):
PEL (Permissible)	TWA 1 mg/m3 (fume)
REL (Recommended)	TWA 1 mg/m3 ST 2 mg/m3 (fume)
IDLH (Immediate danger)	50 mg/m3 (fume)
Safety data sheet (SDS)	External MSDS
Related compounds
Other anions	Zinc fluoride; Zinc bromide; Zinc iodide;
Other cations	Cadmium chloride; Mercury(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

Zinc chloride is the name of inorganic chemical compounds with the formula ZnCl₂. It forms hydrates. Zinc chloride, anhydrous and its hydrates are colorless or white crystalline solids, and are highly soluble in water. Five hydrates of zinc chloride are known, as well as four forms of anhydrous zinc chloride. This salt is hygroscopic and even deliquescent. Zinc chloride finds wide application in textile processing, metallurgical fluxes, and chemical synthesis. No mineral with this chemical composition is known aside from the very rare mineral simonkolleite, Zn₅(OH)₈Cl₂·H₂O.

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