Formate
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Structure of formate

Formate or methanoate is the ion HCOO⁻ (formic acid minus one hydrogen ion). It is the simplest carboxylate anion.

A formate (compound) is a salt or ester of formic acid.

See also formic acid.

Examples

• ethyl formate, CH₃CH₂(HCOO)
• sodium formate, Na(HCOO), [1]
• caesium formate, Cs(HCOO), [2]
• methyl formate, CH₃(HCOO)
• methyl chloro formate, CH₃OCOCl, [3]
• triethyl orthoformate, C₇H₁₆O₃, [4]
• trimethyl orthoformate, C₄H₁₀O₃, [5]

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