Sodium zincate

Sodium zincate refers to anionic zinc oxides or hydroxides, depending on conditions. In the applications of these materials, the exact formula is not necessarily important and it is likely that aqueous zincate solutions consist of mixtures.^[1]

Sodium zincate

Names
IUPAC name sodium tetrahydroxozincate(II)
Identifiers
CAS Number	12179-14-5 Y
3D model (JSmol)	Interactive image
ChemSpider	19990265
ECHA InfoCard	100.032.117
EC Number	235-3 ft42-1
PubChem CID	166652
CompTox Dashboard (EPA)	DTXSID70893224
InChI Key: HVTHJRMZXBWFNE-UHFFFAOYSA-J InChI=1S/2Na.4H2O.Zn/h;;4*1H2;/q2*+1;;;;;+2/p-4
SMILES [OH-].[OH-].[OH-].[OH-].[Na+].[Na+].[Zn+2]
Properties
Chemical formula	Na2[Zn(OH)4]
Molar mass	179.418 g/mol
Hazards
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H314, H410
Precautionary statements	P260, P264, P273, P280, P301+P330+P331, P302+P361+P354, P304+P340, P305+P354+P338, P316, P321, P363, P391, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

Hydroxyzincates

Solutions of sodium zincate may be prepared by dissolving zinc, zinc hydroxide, or zinc oxide in an aqueous solution of sodium hydroxide.^[2] Simplified equations for these complex processes are:

ZnO + H₂O + 2 NaOH → Na₂Zn(OH)₄

Zn + 2 H₂O + 2 NaOH → Na₂Zn(OH)₄ + H₂

From such solutions, one can crystallize salts of containing the anions Zn(OH)₄²⁻, Zn₂(OH)₆²⁻, and Zn(OH)₆⁴⁻. Na₂Zn(OH)₄ consists of tetrahedral zincate ion and octahedral sodium cations.^[3]
The salt Sr₂Zn(OH)₆ features zinc in an octahedral coordination sphere.

Oxozincates

Related oxides are also known such as Na₂ZnO₂,^[4] Na₂Zn₂O₃,^[5] Na₁₀Zn₄O₉.^[6]