CAS No:29943-42-8 Tetrahydro-4H-pyran-4-one|Tetrahydro-4-pyrone;TETRAHYDRO-GAMMA-PYRONE;TETRAHYDROPYRAN-4-ONE;TETRAHYDRO-2H-PYRAN-4-ONE;4-OXOTETRAHYDROPYRAN

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Product Name: Tetrahydro-4H-pyran-4-one
Synonyms: Tetrahydro-4-pyrone;TETRAHYDRO-GAMMA-PYRONE;TETRAHYDROPYRAN-4-ONE;TETRAHYDRO-2H-PYRAN-4-ONE;4-OXOTETRAHYDROPYRAN
CAS No.: 29943-42-8
Molecular Formula: C5H8O2
Molecular Weight : 100.12
Specification : 98%
Place of Origin: China
Appearance :
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Tetrahydro-4H-pyran-4-one Chemical Properties

Boiling point	166-166.5 °C(lit.)

density	1.084 g/mL at 25 °C(lit.)

refractive index	n20/D 1.452(lit.)

Fp	134 °F

storage temp.	Keep Cold

form	Liquid

color	Clear colorless to pale yellow

Water Solubility	MISCIBLE

BRN	106463

InChIKey	JMJRYTGVHCAYCT-UHFFFAOYSA-N

CAS DataBase Reference	29943-42-8(CAS DataBase Reference)

NIST Chemistry Reference	4H-Pyran-4-one, tetrahydro-(29943-42-8)

Hazard Codes	Xi,F

Risk Statements	10-36/37/38

Safety Statements	24/25-36-26

RIDADR	UN 1224 3/PG 3

WGK Germany	3

F	10

Hazard Note	Keep Cold/Flammable/Irritant

HazardClass	3.2

PackingGroup	III

HS Code	29329995



Tetrahydro-4H-pyran-4-one Usage And Synthesis

Chemical Properties	colorless to light yellow liquid

Uses	Tetrahydro-4-pyrone is used in organic synthesis as building block for more complex chemical structures because it participate in a variety of cycloaddition reactions.

Purification Methods	Purify the pyrone by repeated distillation, preferably in a vacuum. [Baker J Chem Soc 296 1944, IR: Olsen & Bredoch Chem Ber 91 1589 1958.] The oxime has m 87-88o and b 110-111o/13mm [Cornubert et al. Bull Soc Chim Fr 36 1950]. The 4-nitrophenylhydrazone forms orange-brown needles from EtOH, m 186o [Cawley & Plant J Chem Soc 1214 1938]. [Beilstein 17 I 131, 17 II 287, 17 III/IV 4171, 17/9 V 21.]



Tetrahydro-4H-pyran-4-one Preparation Products And Raw materials

Raw materials	Etanol-->Sodium hydroxide-->Hydrochloric acid-->Ethyl acetate-->Dichloromethane-->PETROLEUM ETHER-->Magnesium sulfate-->Acetone-->Aluminium chloride-->Diethyl oxalate-->Phosphorous acid-->Nickel-->Sodium ethoxide-->Copper-->Heptane-->Sodium dihydrogenorthophosphate-->Dibutyl phthalate -->ETHYLENE-->1,2,3,4-Tetrahydronaphthalene-->3-Chloropropionyl chloride-->2,2'-Dipyridyl

Preparation Products	4-Aminotetrahydropyran hydrochloride-->2-(TETRAHYDRO-PYRAN-4-YL)-ETHANOL-->4-Aminotetrahydropyran-->E-4-Hexen-1-ol

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