2-(3-Butynyloxy)Tetrahydro-2 H-Pyran（CAS# 40365-61-5)
| Hazard Symbols | Xn – Harmful |
| Risk Codes | R20/21/22 – Harmful by inhalation, in contact with skin and if swallowed. R36/37/38 – Irritating to eyes, respiratory system and skin. |
| Safety Description | S23 – Do not breathe vapour. S26 – In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S28 – After contact with skin, wash immediately with plenty of soap-suds. S37/39 – Wear suitable gloves and eye/face protection |
| WGK Germany | 3 |
| HS Code | 29329900 |
Introduction
It is a colorless to light yellow liquid with a special odor.
2-(3-butynoxy)tetrahydrate-2H-pyran is often used as an intermediate in organic synthesis.
The method of preparing 2-(3-butynoxy)tetrahydrate-2H-pyran is generally to synthesize butynyl by shrinking 3-butynol with sulfuric acid, and then react with formaldehyde to obtain 3-butynylmethanol. The product is esterified with tetraoxane to obtain the target compound.
Safety information: 2-(3-butynyloxy)tetrahydrate-2H-pyran should avoid contact with strong oxidants and strong acids. When handling or using this compound, wear protective gloves and goggles to ensure that the operation is carried out in a well-ventilated area. When storing and transporting, falls and strong heat sources should be avoided.
