The 1-Methylnaphthalene with CAS registry number of 90-12-0 is also known as Naphthalene, alpha-methyl-. The IUPAC name and product name are the same. It belongs to product categories of Alpha Sort; Chemical Class; Hydrocarbons; M; MAlphabetic; Meta-methAnalytical Standards; NaphthalenesChemical Class; Neats; Volatiles/ Semivolatiles; Arenes; Building Blocks; Organic Building Blocks; Alphabetical Listings; Flavors and Fragrances; M-N; Naphthalenes. Its EINECS registry number is 201-966-8. In addition, the formula is C₁₁H₁₀ and the molecular weight is 142.20. This chemical is a colorless liquid and should be stored in ventilated and dry room below 30 °C.1-Methylnaphthalene is sensitive to heat. Reacts with strong oxidizing agents. Incompatible with oxygen and peroxides .

Physical properties about 1-Methylnaphthalene are:
 (1)ACD/LogP: 3.91; (2)ACD/LogD (pH 5.5): 3.91; (3)ACD/LogD (pH 7.4): 3.91; (4)ACD/BCF (pH 5.5): 550.66; (5)ACD/BCF (pH 7.4): 550.66; (6)ACD/KOC (pH 5.5): 3188.07; (7)ACD/KOC (pH 7.4): 3188.07; (8)Index of Refraction: 1.616; (9)Molar Refractivity: 48.92 cm³; (10)Molar Volume: 139.8 cm³; (11)Surface Tension: 38.7 dyne/cm; (12)Density: 1.016 g/cm³; (13)Flash Point: 82.2 °C; (14)Enthalpy of Vaporization: 46.03 kJ/mol; (15)Boiling Point: 242.8 °C at 760 mmHg; (16)Vapour Pressure: 0.0518 mmHg at 25 °C.

Preparation of 1-Methylnaphthalene:
 It is exist in high temperature tar about 0.8%-1.2%. Phenol and pyridine base are removed from the fraction of 230-300 °C. Then the fraction is distillated to collect fraction at 240-245 °C. At last, the fraction is cooled to obtain the product.

Uses of 1-Methylnaphthalene:
It is used as raw material of surfactant, water reducer, dispersant, drugs and other organic synthesis. It is used to produce 1-methylnaphthalene-d10. The reaction occurs with reagents deuterium oxide, sodium deuteroxide and other condition of supercritical pressure at 420-430 °C for 24 hours. The yield is about 75%.


Safety information of 1-Methylnaphthalene:
When you are using 1-Methylnaphthalene, please be cautious about it. As a chemical, it is irritating to eyes, respiratory system and skin. It is harmful by inhalation, in contact with skin and if swallowed. What's more, may cause sensitisation by inhalation and skin contact. It also is toxic to aquatic organisms and may cause long-term adverse effects in the aquatic environment. During using it, wear suitable protective clothing, gloves and eye/face protection. Keep container tightly closed and avoid release to the environment. Do not breathe gas/fumes/vapour/spray. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. If accident happens or you feel unwell seek medical advice immediately.

You can still convert the following datas into molecular structure:
1. Canonical SMILES: CC1=CC=CC2=CC=CC=C12
2. InChI: InChI=1S/C11H10/c1-9-5-4-7-10-6-2-3-8-11(9)10/h2-8H,1H3
3. InChIKey: QPUYECUOLPXSFR-UHFFFAOYSA-N

The toxicity data of 1-Methylnaphthalene is as follows: