Table 1 List of metal formates with known formula detected on heritage objects

Sodium formate

NaHCOO

Potassium formate

KHCOO

Magnesium formate dihydrate

Mg(HCOO)₂·2H₂0

Dashkovaite

α-Calcium formate

Ca(HCOO)₂

Calcium acetate formate monohydrate

Ca(CH₃COO)(HCOO)·H₂O

Tennent’s salt

Calcium acetate formate dinitrate tetrahydrate

Ca₂(CH₃COO)(HCOO)(NO₃)₂·4H₂O

Lead formate

Pb(HCOO)₂

Copper sodium formate hydroxide oxide hydrate

Cu₄Na₄O(HCOO)₈(OH)₂·4H₂O

Basic sodium copper formate, formerly: socoformacite

Copper formate trihydroxide

Cu₂HCOO)(OH)₃

Dicopper trihydroxy formate

Zinc formate dihydrate

Zn(HCOO)₂·2H₂O

Zinc copper formate hydroxide hydrate

Zn₄Cu₃(Zn_1–xCu_x)₆(HCOO)₈(OH)₁₈·6(H₂O)

Zinc C

Cadmium formate dihydrate

Cd(HCOO)₂·2H₂O