Zinc picolinate

Zinc picolinate (or ZnPic) is the zinc coordination complex derived from picolinic acid and zinc(II). It has the formula Zn(NC₅H₄CO₂)₂(H₂O)₂. The complex adopts an octahedral molecular geometry, containing two bidentate picolinate ligands (conjugate base of picolinic acid) and two aquo ligands. Additionally, two water of crystallization are present, thus the compound crystallizes with the formula Zn(NC₅H₄CO₂)₂(H₂O)₂·2H₂O.^[1] It is a colorless solid.

Zinc picolinate

Identifiers
CAS Number	17949-65-4
3D model (JSmol)	Interactive image
ChemSpider	8080400
ECHA InfoCard	100.132.913
PubChem CID	9904746
UNII	ALO92O31SE
CompTox Dashboard (EPA)	DTXSID60170814
InChI InChI=1S/2C6H5NO2.Zn/c2*8-6(9)5-3-1-2-4-7-5;/h2*1-4H,(H,8,9);/q;;+2/p-2 Key: NHVUUBRKFZWXRN-UHFFFAOYSA-L
SMILES C1=CC=NC(=C1)C(=O)[O-].C1=CC=NC(=C1)C(=O)[O-].[Zn+2]
Properties
Chemical formula	C12H12N2O6Zn
Molar mass	345.62 g·mol−1
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H302, H315, H319, H335, H410
Precautionary statements	P261, P264, P270, P271, P273, P280, P301+P312, P302+P352, P304+P340, P305+P351+P338, P312, P321, P330, P332+P313, P337+P313, P362, P391, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Related compounds

Other zinc(II) complexes of picolinic acid have been described.^[2] Isostructural with the zinc complex are M(NC₅H₄CO₂)₂(H₂O)₂·2H₂O (M = Co and Ni).^[3]

Dietary supplement

Zinc picolinate has been used as a dietary zinc supplement.^[4][5][6]