1-Methylnaphthalene(CAS#90-12-0)
| Risk Codes | R22 – Harmful if swallowed R36/37/38 – Irritating to eyes, respiratory system and skin. R42/43 – May cause sensitization by inhalation and skin contact. R51/53 – Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R39/23/24/25 - R23/24/25 – Toxic by inhalation, in contact with skin and if swallowed. R20/21/22 – Harmful by inhalation, in contact with skin and if swallowed. |
| Safety Description | S7 – Keep container tightly closed. S26 – In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 – Wear suitable protective clothing, gloves and eye/face protection. S61 – Avoid release to the environment. Refer to special instructions / safety data sheets. S45 – In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S36/37 – Wear suitable protective clothing and gloves. S23 – Do not breathe vapour. S36 – Wear suitable protective clothing. |
| UN IDs | UN 3082 9/PG 3 |
| WGK Germany | 2 |
| RTECS | QJ9630000 |
| TSCA | Yes |
| HS Code | 29029080 |
| Hazard Class | 9 |
| Packing Group | III |
| Toxicity | LD50 orally in Rabbit: 1840 mg/kg |
Introduction
α-Methylnaphthalene is an organic compound.The properties of α-methylnaphthalene are as follows:1. Appearance: colorless to light yellow solid;4. Density: 1.048 g/cm³;5. Solubility: Soluble in organic solvents, such as ethanol and dimethylformamide.α-methylnaphthalene is often used as an important reagent in organic synthesis:1. Catalyst: It can be used as a catalyst for the preparation of β-ketoate ester and β-ketoacid;2. Fluorescent dyes: α-methylnaphthalene fluorescent properties, it is often used as a raw material for fluorescent dyes.Preparation method of α-methylnaphthalene:A commonly used preparation method is to obtain α-methylnaphthalene by methylating naphthalene. The specific steps are as follows:1. Take a reaction flask and add naphthalene and methyl iodide;2. Heat the reaction mixture so that the reaction takes place to produce α-methylnaphthalene.Safety information for α-methylnaphthalene: Here are some important considerations:1. Toxicity: α-methylnaphthalene is toxic, depending on the dose and mode of exposure. When coming into contact with α-methylnaphthalene, avoid direct contact with the skin and eyes, and avoid inhaling its vapors;2. Flammability: α-methylnaphthalene is a flammable substance. When storing and using, contact with open flames, high temperatures and oxidants should be avoided;3. Storage: α-methylnaphthalene should be stored in a cool, dry, well-ventilated place, away from open flames and other flammable materials.
