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Dihydropyran

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Origem: China

Cas No: 110-87-2

Especificação: 99%Min

Quantidade de ordem min: 1 /kg

Capacidade de fornecimento: 80 mt/month

Tempo de espera: 7 dias para OEM, 3 dias para produtos prontos

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CAS No.: 110-87-2 Formula: C5H8O Molecular Weight: 84.11640

Description

Dihydropyran is a heterocyclic compound with the formula C5H8O. The six-membered, non-aromatic ring has five carbon atoms and one oxygen atom. It contains one double bond. There are two isomers of dihydropyran that differ by the location of the double bond. 3,4-Dihydro-2H-pyran has a double bond at position 5; 3,6-dihydro-2H-pyran has the double bond at position 4.

Basic Info

Chemical Name	Dihydropyran
Synonyms	DIHYDROPYRANE; dihydro-2H-pyran; 3,4-2H-dihydropyran; 2H-Pyran, 3,4-dihydro-; DHP; 3,4-DIHYDROPYRAN; 2,3-dihydro-4H-pyran; 3,4-Dihydro-2H-pyran (DHP); pyran,dihydro; 2,3-dihydropyran; 2H-3,4-dihydropyran; 3,4-Dihydro-2H-pyran; 5,6-dihydro-4H-pyran;
CAS No.	110-87-2
Molecular Formula	C5H8O
Molecular Weight	84.11640
PSA	9.23000
LogP	1.31050

Properties

Appearance & Physical State	Colorless liquid
Density	0.922
Boiling Point	86ºC
Melting Point	-70ºC
Flash Point	-9ºC
Refractive Index	1.4405-1.4425
Water Solubility	20 g/L (20 ºC)
Stability	Stable under normal temperatures and pressures.
Storage Condition	Flammables area
Vapor Density	2.9 (vs air)
Vapor Pressure	74.4mmHg at 25°C

Safety Info

Hazard Class	3
Safety Statements	S16-S26-S37/39
HS Code	29329995
WGK Germany	3
Packing Group	II
RIDADR	UN 2376
Risk Statements	R11; R36/38
Hazard Codes	F
Symbol	GHS02, GHS07
Hazard Declaration	H225; H315; H319; H335
Signal Word	Danger
Caution Statement	P210; P261; P305 + P351 + P338

Synthesis Route

2-(2,4,6-trimethylphenoxy)oxane+phenol→Dihydropyran+2-Phenoxytetrahydropyran
2-Methyl-2-hexanol+2-(2,4,6-trimethylphenoxy)oxane→Dihydropyran+2,4,6-Trimethylphenol
oxane→Tetrahydrofuran+2,3-dihydrofuran

GC Analysis

Column type	Active phase	Temperature (°C)	Retention Index (I)	Temperature Control Method
Packed	Apiezon L	120.	697.	isothermal
Packed	Apiezon L	160.	708.	isothermal
Packed	Apiezon L	170.	720.	isothermal
Capillary	VF-5	-	748.	temperature ramp
Capillary	DB-1	-	664.	temperature ramp

Precursor

methyl benzoate
2-ETHOXY-3,4-DIHYDRO-2H-PYRAN
Tetrahydrofurfuryl Alcohol
dimethoxymethane

Downstream Product

N-(furan-2-ylmethyl)-9-(oxan-2-yl)purin-6-amine
(3R)-3-methyl-4-(oxan-2-yloxy)butanenitrile
ethyl tetrahydro-2H-pyran-2-carboxylate
2-Hydroxy-4-(tetrahydropyran-2-yloxy)acetophenone

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