Zinc picolinate

Zinc picolinate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.132.913 Edit this at Wikidata
UNII
  • 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
  • C1=CC=NC(=C1)C(=O)[O-].C1=CC=NC(=C1)C(=O)[O-].[Zn+2]
Properties
C12H12N2O6Zn
Molar mass 345.62 g·mol−1
Hazards
GHS labelling:
GHS07: Exclamation markGHS09: Environmental hazard
Warning
H302, H315, H319, H335, H410
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).

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. It is a colorless solid.

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

Dietary supplement

Zinc picolinate has been used as a dietary zinc supplement.

References

  1. ↑ Lumme, Paavo; Lundgren, Georg; Mark, Wanda; Lundström, Hans; Borch, Gunner; Craig, J. Cymerman (1969). "The Crystal Structure of Zinc Picolinate Tetrahydrate, Zn(C6H4O2N)2(H2O)4". Acta Chemica Scandinavica. 23: 3011–3022. doi:10.3891/acta.chem.scand.23-3011.
  2. ↑ Vargová, Zuzana; Zeleòák, Vladimı́r; Cı́Saøová, Ivana; Györyová, Katarı́na (2004). "Correlation of Thermal and Spectral Properties of Zinc(II) Complexes of Pyridinecarboxylic Acids with Their Crystal Sructures". Thermochimica Acta. 423 (1–2): 149–157. doi:10.1016/j.tca.2004.03.016.
  3. ↑ Tella, Adedibu C.; Oladipo, Adetola C.; Adeyemi, Olalere G.; Oluwafemi, Oluwatobi S.; Oguntoye, Stephen O.; Alimi, Lukman O.; Ajayi, Joseph T.; Degni, Sylvestre K. (2017). "Solid State Synthesis, Spectroscopic and X-Ray Studies of Metal Complexes of 2-Picolinic Acid and Vapochromic Behavior of [Co(Pic)2(H2O)2 ]·2H2O". Solid State Sciences. 68: 1–9. doi:10.1016/j.solidstatesciences.2017.03.017.
  4. ↑ Walsh CT, Sandstead HH, Prasad AS, Newberne PM, Fraker PJ (June 1994). "Zinc: Health Effects and Research Priorities for the 1990s". Environmental Health Perspectives. 102 (Suppl 2): 5–46. doi:10.1289/ehp.941025. PMC 1567081. PMID 7925188.
  5. ↑ Sakai F, Yoshida S, Endo S, Tomita H (2002). "Double-Blind, Placebo-Controlled Trial of Zinc Picolinate for Taste Disorders". Acta Oto-Laryngologica. Supplementum. 122 (546): 129–33. doi:10.1080/00016480260046517. PMID 12132610. S2CID 23717414.
  6. ↑ Barrie SA, Wright JV, Pizzorno JE, Kutter E, Barron PC (June 1987). "Comparative Absorption of Zinc Picolinate, Zinc Citrate and Zinc Gluconate in Humans". Agents and Actions. 21 (1–2): 223–8. doi:10.1007/BF01974946. PMID 3630857. S2CID 23567370.