Ruifu Chemical is the leading manufacturer of 3,4-Dihydro-2H-Pyran (DHP) (CAS: 110-87-2) with high quality, widely used as a hydroxyl-protecting reagent in organic synthesis. Ruifu provide worldwide delivery, competitive price, small and bulk quantities available. Purchase 3,4-Dihydro-2H-Pyran, Please contact: alvin@ruifuchem.com
| Chemical Name |
3,4-Dihydro-2H-Pyran |
| Synonyms |
DHP; 3,4-DHP; 3,4-Dihydropyran; Dihydropyran; 2,3,4-Trihydropyran, 2H-3,4-Dihydropyran, Dihydro-2H-Pyran; 2,3-Dihydropyran; δ2-Dihydropyran; 3,4-Dihydro-1,2-Pyran |
| Stock Status |
In Stock, Commercial Production |
| CAS Number |
110-87-2 |
| Molecular Formula |
C5H8O |
| Molecular Weight |
84.12 g/mol |
| Melting Point |
-70℃(lit.) |
| Boiling Point |
86℃(lit.) |
| Flash Point |
-6℃ |
| Density |
0.922 g/mL at 25℃(lit.) |
| Refractive Index n20/D |
1.440(lit.) |
| Water Solubility |
20 g/L (20℃) |
| COA & MSDS |
Available |
| Sample |
Available |
| Origin |
Shanghai, China |
| Brand |
Ruifu Chemical |
| Items |
Inspection Standards |
Results |
| Appearance |
Colorless Clear Liquid |
Colorless Clear Liquid |
| Purity / Analysis Method |
>99.0% (GC) |
99.33% |
| Water by Karl Fischer |
<0.30% |
0.28% |
| Tetrahydropyran |
<1.50% |
0.62% |
| Density (20℃) |
0.925~0.933 |
Complies |
| Refractive Index n20/D |
1.440~1.443 |
Complies |
| Infrared Spectrum |
Consistent with Structure |
Complies |
| Conclusion |
The product has been tested and complies with the given specifications |
Package: Bottle, 25kg/Drum, 180kg/Drum, or according to customer's requirement.
Storage: Keep the container tightly closed. Store in a cool, dry, well-ventilated warehouse away from incompatible substances. Protect from light and moisture. Incompatible with oxidizing agents, strong acids and alcohols.
Shipping: Deliver to worldwide by air, by FedEx / DHL Express. Provide fast and reliable delivery.
How to Purchase? Please contact Dr. Alvin Huang: sales@ruifuchem.com or alvin@ruifuchem.com
15 Years Experience? We have more than 15 years of experience in the manufacture and export of a wide range of high quality pharmaceutical intermediates or fine chemicals.
Main Markets? Sell to domestic market, North America, Europe, India, Korea, Japanese, Australia, etc.
Advantages? Superior quality, affordable price, professional services and technical support, fast delivery.
Quality Assurance? Strict quality control system. Professional equipment for analysis include NMR, LC-MS, GC, HPLC, ICP-MS, UV, IR, OR, K.F, ROI, LOD, MP, Clarity, Solubility, Microbial limit test, etc.
Samples? Most products provide free samples for quality evaluation, shipping cost should be paid by customers.
Factory Audit? Factory audit welcome. Please make an appointment in advance.
MOQ? No MOQ. Small order is acceptable.
Delivery Time? If within stock, three days delivery guaranteed.
Transportation? By Express (FedEx, DHL), by Air, by Sea.
Documents? After sales service: COA, MOA, ROS, MSDS, etc. can be provided.
Custom Synthesis? Can provide custom synthesis services to best fit your research needs.
Payment Terms? Proforma invoice will be sent first after confirmation of order, enclosed our bank information. Payment by T/T (Telex Transfer), PayPal, Western Union, etc.
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 2932999099
Hazard Note Highly Flammable/Irritant
Hazard Class 3
Packing Group II
Toxicity LD50 orally in Rabbit: > 4000 mg/kg
3,4-Dihydro-2H-Pyran (DHP) (CAS: 110-87-2) is used as a hydroxyl-protecting reagent in organic synthesis. It acts as an intermediate in synthetic chemistry. It is used to protect various reactive functional groups. It is involved in the polymerization reaction either alone or with unsaturated compound and finds application in polymer industries. Further, it is employed in the preparation of bicyclic compounds of epoxide-fused, halo compounds and allenic alcohols.
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 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.
3,4-Dihydro-2H-Pyran (CAS: 110-87-2) is obtained by dehydration and ring expansion of tetrahydrofurfuryl alcohol.
A flammable and very dangerous fire hazard when exposed to heat or flame; can react vigorously with oxidzing materials. Keep away from heat and open flame. To fight fire, use alcohol foam, CO2, or dry chemical. When heated to decomposition it emits acrid smoke and irritating.
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.