ALPHA-PYRONE | 504-31-4

ALPHA-PYRONE Properties

Melting point	8-9 °C
Boiling point	102-103 °C20 mm Hg(lit.)
Density	1.197 g/mL at 25 °C(lit.)
refractive index	n20/D 1.53(lit.)
Flash point	94 °C
storage temp.	2-8°C
form	Liquid
color	Clear yellow to brown
Odor	Pleasant hay-like, herbaceous-warm odor
BRN	1511
InChI	InChI=1S/C5H4O2/c6-5-3-1-2-4-7-5/h1-4H
InChIKey	ZPSJGADGUYYRKE-UHFFFAOYSA-N
SMILES	C1(=O)OC=CC=C1
LogP	-0.645 (est)
FDA UNII	8WW45I202V
UNSPSC Code	12352100
NACRES	NA.22

SAFETY

Risk and Safety Statements

Symbol(GHS)

GHS07

Signal word

Warning

Hazard statements

H302-H315-H319-H335

Precautionary statements

P261-P301+P312-P302+P352-P304+P340-P305+P351+P338

PPE

Eyeshields, Gloves

Safety Statements

23-24/25

WGK Germany

3

F

8-9-23

HS Code

29322090

Storage Class

10 - Combustible liquids

NFPA 704

	1
0		0

ALPHA-PYRONE price More Price(32)

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
Sigma-Aldrich	463159	2H-Pyran-2-one 90%	504-31-4	1g	$267	2026-04-30	Buy
TCI Chemical	P1183	α-Pyrone >98.0%(GC)	504-31-4	1g	$129	2026-04-30	Buy
Activate Scientific	AS145932	Pyran-2-one 97%	504-31-4	1g	$219	2026-06-04	Buy
Activate Scientific	AS145932	Pyran-2-one 97%	504-31-4	5g	$828	2026-06-04	Buy
Synthonix	P73582	2H-Pyran-2-one 98%	504-31-4	100mg	$60	2026-05-06	Buy

Product number	Packaging	Price	Buy
463159	1g	$267	Buy
P1183	1g	$129	Buy
AS145932	1g	$219	Buy
AS145932	5g	$828	Buy
P73582	100mg	$60	Buy

ALPHA-PYRONE Chemical Properties, Uses, Production

Chemical Properties

clear yellow to brown liquid.
Polymerizes easily upon standing, particularly under alkaline conditions. Very slightly soluble in water, soluble in alcohol and oils.

Uses

2H-Pyran-2-one (a-Pyrone) is a heterocyclic building block. Photochemistry of 2H-pyran-2-one has been investigated by laser flash photolysis with infrared detection. Ketene and a bicyclic lactone were obtained as major photoproducts.

Definition

ChEBI: 2H-pyran-2-one is the simplest member of the class of 2-pyranones that is 2H-pyran with an oxo substituent at position 2.

Synthesis Reference(s)

Journal of the American Chemical Society, 90, p. 2318, 1968 DOI: 10.1021/ja01011a020
Organic Syntheses, Coll. Vol. 6, p. 462, 1988

General Description

2H-Pyran-2-one (a-Pyrone) is a heterocyclic building block. Photochemistry of 2H-pyran-2-one has been investigated by laser flash photolysis with infrared detection. Ketene and a bicyclic lactone were obtained as major photoproducts.

Purification Methods

Dissolve -pyrone in Et2O, wash it with brine, dry (Na2SO4), f

ALPHA-PYRONE Preparation Products And Raw materials

Raw materials

Preparation Products

NSC 263484 5-Bromo-2H-pyran-2-one,95% Phosphonic acid, P,P'-1,2-phenylenebis-, P,P,P',P'-tetraethyl ester

ALPHA-PYRONE Suppliers

Global Suppliers ( 122)

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
TCI (Shanghai) Development Co., Ltd.	021-67121386	Sales-CN@TCIchemicals.com	China	24512	81
Shanghai Longsheng chemical Co.,Ltd.	58099637 13585536065	sales@shlschem.com	China	9880	59
Shanghai Hanhong Scientific Co.,Ltd.	021-54306202 13764082696	info@hanhongsci.com	China	42917	64
Maya High Purity Chemicals	+86 (573) 82222445 (0)18006601000 452520369	sales@maya-r.com	China	11693	57
Thermo Fisher Scientific	800-810-5118	cnchemical@thermofisher.com	China	17752	75
Beijing innoChem Science & Technology Co.,Ltd.	400-810-7969 010-59572699	ningzi.li@inno-chem.com.cn	China	6122	55
Shanghai T&W Pharmaceutical Co., Ltd.	+86 21 61551611		China	9874	58
Shanghai Jian Chao Chemical Technology Co., Ltd.	150-2103-5486 18017383231	983544897@qq.com	China	9335	55

Supplier	Advantage
J & K SCIENTIFIC LTD.	76
Meryer (Shanghai) Chemical Technology Co., Ltd.	62
TCI (Shanghai) Development Co., Ltd.	81
Shanghai Longsheng chemical Co.,Ltd.	59
Shanghai Hanhong Scientific Co.,Ltd.	64
Maya High Purity Chemicals	57
Thermo Fisher Scientific	75
Beijing innoChem Science & Technology Co.,Ltd.	55
Shanghai T&W Pharmaceutical Co., Ltd.	58
Shanghai Jian Chao Chemical Technology Co., Ltd.	55

View Latest Price from ALPHA-PYRONE manufacturers

Update time	Product	Price	Min. Order	Purity	Supply Ability	Manufacturer
2026-08-20	ALPHA-PYRONE 504-31-4	$1.10	1g	99.00%	100 Tons Min	Dideu Industries Group Limited
2019-11-08	ALPHA-PYRONE 504-31-4		1g	98%min	20kg/month	Nanjing jinheyou Trading Co., Ltd.
2019-07-10	ALPHA-PYRONE 504-31-4	$1.00	1KG	99%	1ton	Career Henan Chemical Co

ALPHA-PYRONE
504-31-4
$1.10
99.00%
Dideu Industries Group Limited

ALPHA-PYRONE
504-31-4
$0.00
98%min
Nanjing jinheyou Trading Co., Ltd.

ALPHA-PYRONE
504-31-4
$1.00
99%
Career Henan Chemical Co

ALPHA-PYRONE Spectrum

ALPHA-PYRONE(504-31-4)¹HNMR ALPHA-PYRONE(504-31-4)Raman

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1of4

chloro-4’phenyl-4methyl-6phenyl-3tetrahdyro-3,4,5,6pyrone-6(3r*,4s*,6r* Coumalin pyran-2-one α-pyrone cumalin tetrahydro-4-(4-chlorophenyl)-6-methyl-3-phenyl-,(3-alpha,4-beta,6-alpha)-2h-pyran-2-on α-Pyron ALPHA-PYRONE 2H-PYRAN-2-ONE 99% 2H-Pyran-2-one,97% 2H-Pyran-2-one,99% Pyrone,alpha- chloro-4’phenyl- 2H-Pyran-2-one, 97% 5GR 2,4-Pentadienoic acid, 5-hydroxy-, delta-lactone 2H-Pyran, 2-oxo- 2h-pyran-2-one,tetrahydro-4-(4-chlorophenyl)-6-methyl-3-phenyl-,(3-alpha,4-be 2-Pyranone 4-beta,6-alpha)-tetrahydro-4-(4-chlorophenyl)-6-methyl-3-phenyl-2h-(3-alph α-Pyrone> -Pyrone ALPHA-PYRONE ISO 9001：2015 REACH 2H-Pyran-2-one α-Pyrone 2H-Pyran-2-one - [P73582] 2H-PYRAN-2-ONE 2-Pyrone 504-31-4 Building Blocks Heterocyclic Building Blocks Pyrans Building Blocks Chemical Synthesis Heterocyclic Building Blocks Pyrans