| Identification | More | [Name]
Tetrahydropyran | [CAS]
142-68-7 | [Synonyms]
OXACYCLOHEXANE
PENTAMETHYLENE OXIDE
TETRAHYDROPYRAN
THP
2H-pyran,tetrahydro-
Etrahydropyran
tetrahydro-2h-pyra
Tetrahydro-2H-pyran
tetrahydropyrane
TETRAHYDROPYRAN, REAGENTPLUS, 99%
TETRAHYDROPYRAN, ANHYDROUS, 99%
Pentamethyleneoxide,THP
1,5-EPOXYPENTANE
Tetrahydropyran, 98+%
3,4,5,6-Tetrahydro-2H-pyran | [EINECS(EC#)]
205-552-8 | [Molecular Formula]
C5H10O | [MDL Number]
MFCD00006585 | [Molecular Weight]
86.13 | [MOL File]
142-68-7.mol |
| Chemical Properties | Back Directory | [Appearance]
colorless to light yellow liquid | [Melting point ]
-45 °C (lit.) | [Boiling point ]
88 °C (lit.) | [density ]
0.881 g/mL at 25 °C(lit.)
| [vapor density ]
3 (vs air)
| [refractive index ]
n20/D 1.42(lit.)
| [Fp ]
4 °F
| [storage temp. ]
Flammables area | [solubility ]
>80.2g/l | [form ]
Liquid | [color ]
Clear colorless | [Odor]
at 0.10?%?in?dipropylene glycol. pungent sweet ethereal | [Water Solubility ]
80 g/L (25 ºC) | [Merck ]
14,9217 | [BRN ]
102436 | [Dielectric constant]
7.3（30℃） | [InChI]
1S/C5H10O/c1-2-4-6-5-3-1/h1-5H2 | [InChIKey]
DHXVGJBLRPWPCS-UHFFFAOYSA-N | [SMILES]
C1CCOCC1 | [LogP]
0.950 | [Surface tension]
27.5mN/m at 293.15K | [CAS DataBase Reference]
142-68-7(CAS DataBase Reference) | [NIST Chemistry Reference]
2H-Pyran, tetrahydro-(142-68-7) | [EPA Substance Registry System]
142-68-7(EPA Substance) |
| Safety Data | Back Directory | [Symbol(GHS) ]
GHS02 | [Signal word ]
Danger | [Hazard statements ]
H225 | [Precautionary statements ]
P210-P233-P240-P241-P242-P243 | [Hazard Codes ]
F,Xi | [Risk Statements ]
R11:Highly Flammable.
R36/37/38:Irritating to eyes, respiratory system and skin .
R9:Explosive when mixed with combustible material.
R19:May form explosive peroxides. | [Safety Statements ]
S9:Keep container in a well-ventilated place .
S16:Keep away from sources of ignition-No smoking .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S33:Take precautionary measures against static discharges .
S36:Wear suitable protective clothing . | [RIDADR ]
UN 1993 3/PG 2
| [WGK Germany ]
3
| [TSCA ]
Yes | [HazardClass ]
3 | [PackingGroup ]
II | [HS Code ]
29321100 | [Storage Class]
3 - Flammable liquids | [Hazard Classifications]
Flam. Liq. 2 | [Hazardous Substances Data]
142-68-7(Hazardous Substances Data) |
| Hazard Information | Back Directory | [Description]
Tetrahydropyran (THP) is the organic compound consisting of a saturated six-membered ring containing five carbon atoms and one oxygen atom. It is named by reference to pyran, which contains two double bonds, and may be produced from it by adding four hydrogens. Tetrahydropyran can be used as a solvent in various classical organic reactions such as radical reactions, palladium-catalyzed coupling, and Grignard reactions. | [Chemical Properties]
colorless to light yellow liquid | [Uses]
It is is an important raw material and intermediate used in Organic Synthesis, Pharmaceuticals, Agrochemicals and dyestuff. They are also used as important solvents, as chemical intermediate and as monomer for ring-opening polymerization. | [Definition]
ChEBI: A saturated organic heteromonocyclic parent that is cyclohexane in which one of the carbon atoms has been replaced by an oxygen atom. | [Purification Methods]
Dry oxane with CaH2, then pass it through a column of silica gel to remove olefinic impurities and fractionally distil it. Free it from peroxides and moisture by refluxing with sodium, then distil it from LiAlH4. Alternatively, peroxides can be removed by treatment with aqueous ferrous sulfate and sodium bisulfate, followed by solid KOH, and fractional distillation from sodium. [Beilstein 17 H 12, 17 I 6, 17 II 18, 17 III/IV 51, 17/1 V 64.] |
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