110-87-2
3,4-Dihydro-2H-pyran
CAS: 110-87-2
Molecular Formula: C5H8O
110-87-2 - Names and Identifiers
| Name | 3,4-Dihydro-2H-pyran |
| Synonyms | DHP Dihydropyran DIHYDROPYRAN DIHYDROPYRANE pyran,dihydro- Pyran, dihydro- δ2-dihydropyran 3,4-Dihydropyran 2,3-Dihydropyran 2,3- DIHYDROPYRAN 3,4-Dihydro-2-pyran delta2-Dihydropyran 3,4-2H-Dihydropyran 3,4-dihydro-2h-pyra 2H-3,4-Dihydropyran 3,4-Dihydro-2H-pyran 5,6-Dihydro-4H-pyran 3,4-Dihdro-2H-pyrane 2H-Pyran,3,4-dihydro- delta(Sup2)-Dihydropyran |
| CAS | 110-87-2 |
| EINECS | 203-810-4 |
| InChI | InChI=1/C5H8O/c1-2-4-6-5-3-1/h2,4H,1,3,5H2 |
| InChIKey | BUDQDWGNQVEFAC-UHFFFAOYSA-N |
110-87-2 - Physico-chemical Properties
| Molecular Formula | C5H8O |
| Molar Mass | 84.12 |
| Density | 0.922 g/mL at 25 °C (lit.) |
| Melting Point | -70 °C (lit.) |
| Boling Point | 86 °C (lit.) |
| Flash Point | 4°F |
| Water Solubility | 20 g/L (20 ºC) |
| Solubility | 7.7g/l |
| Vapor Presure | 77.8 hPa (20 °C) |
| Vapor Density | 2.9 (vs air) |
| Appearance | Liquid |
| Color | Clear colorless to yellow |
| BRN | 103493 |
| PH | 7 (5g/l, H2O, 20℃) |
| Storage Condition | Store below +30°C. |
| Stability | Volatile |
| Explosive Limit | 1.1-13.8%(V) |
| Refractive Index | n20/D 1.440(lit.) |
| Physical and Chemical Properties | Melting point − 70°C(lit.) boiling point 86°C(lit.) density 0.922g/mL at 25°C(lit.) vapor density 2.9 (vs air) refractive index n20/D 1.440(lit.) flash point 4 °F water solubility 20g/L (20°C) BRN 103493 |
| Use | Used as a pharmaceutical Intermediate |
110-87-2 - Risk and Safety
| Risk Codes | R11 - Highly Flammable R36/37/38 - Irritating to eyes, respiratory system and skin. R36/38 - Irritating to eyes and skin. R19 - May form explosive peroxides |
| Safety Description | S16 - Keep away from sources of ignition. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S37/39 - Wear suitable gloves and eye/face protection S33 - Take precautionary measures against static discharges. S7/9 - |
| UN IDs | UN 2376 3/PG 2 |
| WGK Germany | 3 |
| RTECS | UP7700000 |
| TSCA | Yes |
| HS Code | 29329995 |
| Hazard Note | Highly Flammable/Irritant |
| Hazard Class | 3 |
| Packing Group | II |
| Toxicity | LD50 orally in Rabbit: > 4000 mg/kg |
110-87-2 - Reference Information
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Introduction | 3, 4-dihydro-2h-pyran, abbreviated as DHP, is an organic intermediate, commonly used as a protecting group. 3, 4-dihydro-2h-pyran can be prepared from tetrahydrofurfuryl alcohol. |
| storage method | store in a cool and ventilated warehouse. Away from fire, heat source, anti-static. Storage temperature should not exceed 30 ℃. It should be stored separately from the oxidant, and mixed storage should not be avoided. Explosion-proof lighting and ventilation facilities shall be adopted. The use of spark-prone mechanical equipment and tools is prohibited. The storage area shall be equipped with emergency treatment equipment for leakage and appropriate containment materials. |
| Use | pharmaceutical intermediate, used for 1, 5-dichloropentane, and then can synthesize heptanediamine, heptanedioic acid, and for the production of synthetic fiber wait. 2, 3-hydropyran is used in the synthesis of pot and selective myeloperoxase inhibitors useful as microantial oxidants. Also is used to synthesize novel and selective σ1 receptor ligands. 3, 4-dihydro-2h-pyran is widely used as OH Protection reagent. Tetrahydropyran, pentanediol, Glutaric acid, valerolactone, pentadiene and resin products; Can also be used as pharmaceutical intermediates; Can also be used as solvents, organic synthesis intermediates; Widely used for the protection of hydroxyl groups, generally do not react with Nucleophilic Reagents and organometallic reagents, it is resistant to strong alkali and is easy to change under low pH or Lewis acid conditions. Alcohol Group-protecting reagent; Widely used reagent for hydroxyl group protection |
| production method | is obtained by dehydration and ring expansion of tetrahydrofurfuryl alcohol. |
| autoignition temperature | 240°C |
Last Update：2024-04-09 02:00:04
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