ChemicalBook >> CAS DataBase List >>4-Oxo-4,5,6,7-tetrahydrobenzo[b]furan-3-carboxylic acid

4-Oxo-4,5,6,7-tetrahydrobenzo[b]furan-3-carboxylic acid

4-Oxo-4,5,6,7-tetrahydrobenzo[b]furan-3-carboxylic acid structure

CAS No.: 56671-28-4

Chemical Name:: 4-Oxo-4,5,6,7-tetrahydrobenzo[b]furan-3-carboxylic acid

Synonyms: AKOS BBS-00000134;BUTTPARK 29\08-32;IFLAB-BB F1901-0074;4 5 6 7-TETRAHYDRO-4-OXOBENZOFURAN-3- &;4,5,6,7-Tetrahydro-4-oxobenzofuran-3-caroxylic acid;4,5,6,7-tetrahydro-4-oxo-3-benzofurancarboxylicacid;4-OXO-4,5,6,7-TETRAHYDROCOUMARONE-3-CARBOXYLIC ACID;4-oxo-6,7-dihydro-5H-1-benzofuran-3-carboxylic acid;4-OXO-4,5,6,7-TETRAHYDROBENZOFURAN-3-CARBOXYLIC ACID;4,5,6,7-Tetrahydro-4-oxobenzofuran-3-carboxylic acid

CBNumber:: CB0752330

Molecular Formula:: C9H8O4

Molecular Weight:: 180.16

MDL Number:: MFCD00052170

MOL File:: 56671-28-4.mol

MSDS File:: SDS

Last updated:2026-09-12 18:48:29

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4-Oxo-4,5,6,7-tetrahydrobenzo[b]furan-3-carboxylic acid Properties

Melting point	140 °C
Boiling point	383.5±42.0 °C(Predicted)
Density	1.406±0.06 g/cm3(Predicted)
storage temp.	2-8°C
pka	3.74±0.20(Predicted)
Appearance	Off-white to yellow Solid
CAS DataBase Reference	56671-28-4

SAFETY

Risk and Safety Statements

Symbol(GHS)	GHS05
Signal word	Danger
Hazard statements	H314-H318
Precautionary statements	P280-P305+P351+P338-P310
Hazard Codes	C
Risk Statements	36/37/38
Safety Statements	26-36/37/39
Hazard Note	Corrosive
HazardClass	IRRITANT
HS Code	2932990090

4-Oxo-4,5,6,7-tetrahydrobenzo[b]furan-3-carboxylic acid price More Price(42)

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
Biosynth	GCA67128	4-Oxo-4,5,6,7-tetrahydrobenzofuran-3-carboxylic acid	56671-28-4	2.5g	$501.5	2026-06-04	Buy
Biosynth	GCA67128	4-Oxo-4,5,6,7-tetrahydrobenzofuran-3-carboxylic acid	56671-28-4	25g	$2655	2026-06-04	Buy
Apolloscientific	OR1251	4-Oxo-4,5,6,7-tetrahydrobenzo[b]furan-3-carboxylic acid 96%	56671-28-4	250mg	$22	2026-06-04	Buy
Apolloscientific	OR1251	4-Oxo-4,5,6,7-tetrahydrobenzo[b]furan-3-carboxylic acid 96%	56671-28-4	1g	$77	2026-06-04	Buy
Apolloscientific	OR1251	4-Oxo-4,5,6,7-tetrahydrobenzo[b]furan-3-carboxylic acid 96%	56671-28-4	5g	$372	2026-06-04	Buy

Product number	Packaging	Price	Buy
GCA67128	2.5g	$501.5	Buy
GCA67128	25g	$2655	Buy
OR1251	250mg	$22	Buy
OR1251	1g	$77	Buy
OR1251	5g	$372	Buy

4-Oxo-4,5,6,7-tetrahydrobenzo[b]furan-3-carboxylic acid Chemical Properties,Uses,Production

Chemical Properties

White needle crystals. Melting point 141℃.

Uses

4-Oxo-4,5,6,7-tetrahydrobenzo[b]furan-3-carboxylic acid can be used as an intermediate of Propala.

Definition

ChEBI: 4-oxo-4,5,6,7-tetrahydrobenzo[b]furan-3-carboxylic acid is a member of benzofurans.

Synthesis

The methanol solution of resorcinol and potassium hydroxide is used to react with hydrogen under the action of active nickel to generate potassium 3-ketocyclohex-1-enolate, which is then cyclized with ethyl bromopyruvate under alkaline conditions , and then acidified to obtain 4-oxo-4,5,6,7-tetrahydrobenzo[b]furan-3-carboxylic acid.

4-Oxo-4,5,6,7-tetrahydrobenzo[b]furan-3-carboxylic acid Preparation Products And Raw materials

Raw materials

Methanol solution Ethyl bromopyruvate Resorcinol

Preparation Products

4-Hydroxybenzofuran-3-carboxylic acid

4-Oxo-4,5,6,7-tetrahydrobenzo[b]furan-3-carboxylic acid Suppliers

Global( 69)Suppliers

Supplier	Tel	Email	Country	ProdList	Advantage
J & K SCIENTIFIC LTD.	18210857532 18210857532	jkinfo@jkchemical.com	China	96815	76
Meryer (Shanghai) Chemical Technology Co., Ltd.	4006356688 18621169109	market03@meryer.com	China	40202	62
Wuhan Chemwish Technology Co., Ltd	86-027-67849912	sales@chemwish.com	China	35884	56
T&W GROUP	021-61551611 13296011611	contact@trustwe.com	China	9884	58
Thermo Fisher Scientific	800-810-5118	cnchemical@thermofisher.com	China	17752	75
9ding chemical ( Shanghai) Limited	4009209199	sales@9dingchem.com	China	22497	55
Modachem Shanghai Co., Ltd	+86 (0)21 51320687 51371369 1744605818		China	1576	58
Hunan HuaTeng Pharmaceutical Co., Ltd.,	400-8592883 15367835770	sales@huatengsci.com	China	5869	58
Shanghai ChuangYan Chemical Technology Co., Ltd.	021-11111111 11111111111	546919421@qq.com	China	3770	55
Sigma-Aldrich	021-61415566 800-8193336	orderCN@merckgroup.com	China	51389	80

Supplier	Advantage
J & K SCIENTIFIC LTD.	76
Meryer (Shanghai) Chemical Technology Co., Ltd.	62
Wuhan Chemwish Technology Co., Ltd	56
T&W GROUP	58
Thermo Fisher Scientific	75
9ding chemical ( Shanghai) Limited	55
Modachem Shanghai Co., Ltd	58
Hunan HuaTeng Pharmaceutical Co., Ltd.,	58
Shanghai ChuangYan Chemical Technology Co., Ltd.	55
Sigma-Aldrich	80

View Lastest Price from 4-Oxo-4,5,6,7-tetrahydrobenzo[b]furan-3-carboxylic acid manufacturers

Image	Update time	Product	Price	Min. Order	Purity	Supply Ability	Manufacturer
	2019-07-06	4-OXO-4,5,6,7-TETRAHYDROBENZO[B]FURAN-3-CARBOXYLIC ACID 56671-28-4	$1.00	1KG	98%	200KG	Career Henan Chemical Co

4-OXO-4,5,6,7-TETRAHYDROBENZO[B]FURAN-3-CARBOXYLIC ACID
56671-28-4
$1.00
98%
Career Henan Chemical Co

4-Oxo-4,5,6,7-tetrahydrobenzo[b]furan-3-carboxylic acid Spectrum

4-OXO-4,5,6,7-TETRAHYDROBENZO[B]FURAN-3-CARBOXYLIC ACID(56671-28-4)¹HNMR

56671-28-4(4-Oxo-4,5,6,7-tetrahydrobenzo[b]furan-3-carboxylic acid)Related Search:

2-methyl-4-oxo-4,5,6,7-tetrahydro-1-benzofuran-3-carboxylic acid Methyl 4-oxo-4,5,6,7-tetrahydro-1-benzofuran-3-carboxylate 6,6-Dimethyl-4-oxo-4,5,6,7-tetrahydro-1-benzofuran-3-carboxylic acid 4-Oxo-4,5,6,7-tetrahydrobenzo[b]furan-3-carboxylic acid Ethyl 2,5,5-trimethyl-7-oxo-3,4,5,6-tetrahydro-3-oxaindenecarboxylate

methyl 2-methyl-4-oxo-4,5,6,7-tetrahydrobenzofuran-3-carboxylate

1of2

4,5,6,7-tetrahydro-4-oxo-3-benzofurancarboxylicacid 4,5,6,7-Tetrahydro-4-oxobenzofuran-3-caroxylic acid 4-OXO-4,5,6,7-TETRAHYDRO-1-BENZOFURAN-3-CARBOXYLIC ACID 4-OXO-4,5,6,7-TETRAHYDROBENZOFURAN-3-CARBOXYLIC ACID 4-OXO-4,5,6,7-TETRAHYDROCOUMARONE-3-CARBOXYLIC ACID AKOS BBS-00000134 IFLAB-BB F1901-0074 BUTTPARK 29\08-32 4 5 6 7-TETRAHYDRO-4-OXOBENZOFURAN-3- & 4,5,6,7-Tetrahydro-4-oxobenzofuran-3-carboxylic acid 3-Benzofurancarboxylicacid, 4,5,6,7-tetrahydro-4-oxo- 4-Oxo-4,5,6,7-tetrahydro-1-benzofuran-3-carboxylic acid, 3-Carboxy-4-oxo-4,5,6,7-tetrahydrobenzo[b]furan 4-oxo-6,7-dihydro-5H-1-benzofuran-3-carboxylic acid 4-Oxo-4,5,6,7-tetrahydrobenzo[b]furan-3-carboxylic acid 56671-28-4