2-Furoic acid

2-Furoic Acid
Names
	Preferred IUPAC name Furan-2-carboxylic acid
	Other names 2-Furoic acid; Pyromucic acid; 2-Furancarboxylic acid; α-Furancarboxylic acid; α-Furoic acid; 2-Carboxyfuran;
Identifiers
CAS Number	88-14-2 ;
3D model (JSmol)	Interactive image;
Beilstein Reference	110149
ChEBI	CHEBI:30845 ;
ChemSpider	10251740 ;
ECHA InfoCard	100.001.639
Gmelin Reference	3056
KEGG	C01546;
PubChem CID	6919;
UNII	P577F6494A ;
CompTox Dashboard (EPA)	DTXSID6041420 ;
	InChI InChI=1S/C5H4O3/c6-5(7)4-2-1-3-8-4/h1-3H,(H,6,7) Key: SMNDYUVBFMFKNZ-UHFFFAOYSA-N ; InChI=1/C4H9.Li/c1-3-4-2;/h1,3-4H2,2H3;/rC4H9Li/c1-2-3-4-5/h2-4H2,1H3 Key: MZRVEZGGRBJDDB-NESCHKHYAE;
	SMILES OC(=O)C1=CC=CO1;
Properties
Chemical formula	C5H4O3
Molar mass	112.084 g·mol−1
Appearance	White/ Off-White (Beige) Crystalline Powder
Density	0.55 g/cm3
Melting point	128 to 132 °C (262 to 270 °F; 401 to 405 K)
Boiling point	230 to 232 °C (446 to 450 °F; 503 to 505 K)
Solubility in water	Easily soluble in cold and hot water, 27.1 g/L
Acidity (pKa)	3.12 at 25 °C
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Irritating to eyes, respiratory system and skin.
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H315, H319, H335
Precautionary statements	P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501
NFPA 704 (fire diamond)	2 1 0
Related compounds
Related compounds	2-Thiophenecarboxylic acid, ; 3-Furoic acid, Furfuryl alcohol, ; 2,5-Furandicarboxylic acid, ; Furfurylamine
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

2-Furoic acid is an organic compound, consisting of a furan ring and a carboxylic acid side-group. Along with other furans, its name is derived from the Latin word furfur, meaning bran, from which these compounds were first produced. The salts and esters of furoic acids are known as furoates. 2-Furoic acid is most widely encountered in food products as a preservative and a flavouring agent, where it imparts a sweet, earthy flavour.

Names

Preferred IUPAC name Furan-2-carboxylic acid
Other names 2-Furoic acid Pyromucic acid 2-Furancarboxylic acid α-Furancarboxylic acid α-Furoic acid 2-Carboxyfuran
Identifiers
CAS Number	88-14-2^Y
3D model (JSmol)	Interactive image
Beilstein Reference	110149
ChEBI	CHEBI:30845^Y
ChemSpider	10251740^Y
ECHA InfoCard	100.001.639
Gmelin Reference	3056
KEGG	C01546
PubChem CID	6919
UNII	P577F6494A^Y
CompTox Dashboard (EPA)	DTXSID6041420
InChI InChI=1S/C5H4O3/c6-5(7)4-2-1-3-8-4/h1-3H,(H,6,7)^Y Key: SMNDYUVBFMFKNZ-UHFFFAOYSA-N^Y InChI=1/C4H9.Li/c1-3-4-2;/h1,3-4H2,2H3;/rC4H9Li/c1-2-3-4-5/h2-4H2,1H3 Key: MZRVEZGGRBJDDB-NESCHKHYAE
SMILES OC(=O)C1=CC=CO1
Properties
Chemical formula	C₅H₄O₃
Molar mass	112.084 g·mol⁻¹
Appearance	White/ Off-White (Beige) Crystalline Powder
Density	0.55 g/cm³
Melting point	128 to 132 °C (262 to 270 °F; 401 to 405 K)
Boiling point	230 to 232 °C (446 to 450 °F; 503 to 505 K)
Solubility in water	Easily soluble in cold and hot water, 27.1 g/L
Acidity (pK_a)	3.12 at 25 °C
Hazards
Occupational safety and health (OHS/OSH):
Main hazards	Irritating to eyes, respiratory system and skin.
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H315, H319, H335
Precautionary statements	P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501
NFPA 704 (fire diamond)	2 1 0
Related compounds
Related compounds	2-Thiophenecarboxylic acid, 3-Furoic acid, Furfuryl alcohol, 2,5-Furandicarboxylic acid, Furfurylamine
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is ^YN ?) Infobox references