Description

1-Methylnaphthalene (CAS No. 90-12-0) is a high-purity aromatic hydrocarbon with the molecular formula C₁₁H₁₀, widely utilized in research and industrial applications. This colorless to pale yellow liquid is a derivative of naphthalene, featuring a methyl group at the 1-position, enhancing its reactivity and solubility in organic solvents. With a boiling point of approximately 244-246°C and a melting point of -30°C, 1-Methylnaphthalene is ideal for high-temperature applications and synthetic chemistry. It is commonly employed as a solvent, reference fuel component, and intermediate in the synthesis of dyes, pharmaceuticals, and agrochemicals. Our product is rigorously tested for purity (≥98% by GC) and consistency, ensuring reliable performance in your laboratory or manufacturing processes. Packaged under inert gas to prevent oxidation, it is available in various quantities to meet your specific needs.

Properties

• CAS Number: 90-12-0
• Complexity: 128
• IUPAC Name: 1-methylnaphthalene
• InChI: InChI=1S/C11H10/c1-9-5-4-7-10-6-2-3-8-11(9)10/h2-8H,1H3
• InChI Key: QPUYECUOLPXSFR-UHFFFAOYSA-N
• LogP: log Kow of 3.87
• Exact Mass: 142.078250319
• Molecular Formula: C11H10
• Molecular Weight: 142.20
• SMILES: CC1=CC=CC2=CC=CC=C12
• Monoisotopic Mass: 142.078250319
• Physical Description: Methylnaphthalene appears as bluish-brown oil or a clear yellow liquid. Coal tar or mothball odor.
• Color/Form: Colorless liquid or oil
• Boiling Point: 450 to 590 °F at 760 mmHg
• Melting Point: -8 °F
• Flash Point: greater than 200 °F
• Solubility: less than 1 mg/mL at 64 °F
• Density: 1.01 at 59.9 °F – Denser than water; will sink
• Vapor Density: 4.91 – Heavier than air; will sink
• Vapor Pressure: 23 mmHg at 77 °F ; 31 mmHg at 122 °F; 38 mmHg at 158 °F
• Henry’s Law Constant: Henry’s Law constant = 5.14X10-4 atm-cu m/mol at 25 °C
• Stability/Shelf Life: This chemical is stable under normal laboratory conditions. Solutions of this chemical in water, DMSO, 95% ethanol or acetone should be stable for 24 hours under normal lab conditions.
• Autoignition Temperature: 984 °F
• Heat of Vaporization: 36.00 kJ/mol at 100.5 °C
• Odor Threshold: Odor Threshold Low: 0.02 [ppm]
• Refractive Index: Index of refraction: 1.6170 at 20 °C
• Synonyms: 1-METHYLNAPHTHALENE, 90-12-0, alpha-Methylnaphthalene, Naphthalene, 1-methyl-, 1-methyl-naphthalene, alpha-methyl naphthalenes, FEMA No. 3193, FEMA Number 3193, .alpha.-Methylnaphthalene, Naphthalene, alpha-methyl-, 1-Methyl naphthalene, Methyl-1-naphthalene, CCRIS 6151, HSDB 5268, methyl-naphthalene, NSC 3574, EINECS 201-966-8, UNII-E7SK1Y1311, DTXSID9020877, CHEBI:50717, MECHINAFU H, METHYNAPH H, naphthalene, 1-methyl, AI3-15378, alpha-methyl-naphthalene, E7SK1Y1311, NSC-3574, DTXCID30877, EC 201-966-8, 1-METHYLNAPHTHALENE [FHFI], 1-METHYLNAPHTHALENE [HSDB], 1Methylnaphthalene, a-methylnaphthalene, alpha-Methylnaftalen, a-methyl-naphthalene, alphamethylnaphthalene, Naphthalene, 1methyl, Naphthalene, alphamethyl, Naphthalene, alpha-methyl, Flavor and Extract Manufacturers’ Association Number 3193, 201-966-8, inchi=1/c11h10/c1-9-5-4-7-10-6-2-3-8-11(9)10/h2-8h,1h, qpuyecuolpxsfr-uhfffaoysa-n, METHYLNAPHTHALENE, 1321-94-4, Naphthalene, methyl-, 1-Methylnapththalene, Methyl naphthalene, MFCD00004034, CHEMBL383808, 1-Methylnaphthalene, analytical standard, CAS-90-12-0, 1-methylnaphtalene, Naphthalene, 1-methyl-; 1-Methylnaphthalene; Mechinafu H; Methynaph H; NSC 3574; a-Methylnaphthalene, bmse000531, 1-Methylnaphthalene, 95%, 1-Methylnaphthalene, 96%, SCHEMBL3074, SCHEMBL3075, SCHEMBL67474, MLS001050152, BIDD:ER0662, SCHEMBL148866, SCHEMBL219753, SCHEMBL242897, SCHEMBL385872, SCHEMBL386156, SCHEMBL455151, SCHEMBL466417, SCHEMBL524025, 1-Methylnaphthalene, >=95%, SCHEMBL1109907, SCHEMBL1178290, SCHEMBL2250625, SCHEMBL2251887, SCHEMBL2254086, SCHEMBL2256297, SCHEMBL5602938, SCHEMBL5604271, SCHEMBL7517852, SCHEMBL9390596, WLN: L66J B1, SCHEMBL17911639, FEMA 3193, DTXSID10225161, NSC3574, Tox21_201768, Tox21_300339, BDBM50159279, SBB060401, STL283953, AKOS000120012, MSK000683-100T, NCGC00091700-01, NCGC00091700-02, NCGC00091700-03, NCGC00254488-01, NCGC00259317-01, AS-88435, PD124014, SMR001216533, DB-049234, DB-078596, M0371, NS00002590, ST51046588, EN300-19783, 1-Methylnaphthalene 10 microg/mL in Cyclohexane, 1-Methylnaphthalene 10 microg/mL in Acetonitrile, A843450, Q161656, 1-Methylnaphthalene Solution in Toluene, 100ug/mL, Z104475342, 1-Methylnaphthalene, TraceCERT(R), certified reference material

Application

1-Methylnaphthalene is widely used as a reference fuel component for cetane number determination in diesel engines due to its low ignition quality. It serves as a solvent in organic synthesis and as a precursor for dyes, pharmaceuticals, and specialty chemicals. Researchers also utilize it as a model compound in environmental studies to understand polycyclic aromatic hydrocarbon (PAH) behavior. Its stability and aromaticity make it valuable in material science for developing advanced polymers and coatings.

Safety and Hazards

GHS Hazard Statements

• H227: Combustible liquid [Warning Flammable liquids]
• H302: Harmful if swallowed [Warning Acute toxicity, oral]
• H315: Causes skin irritation [Warning Skin corrosion/irritation]
• H319: Causes serious eye irritation [Warning Serious eye damage/eye irritation]
• H334: May cause allergy or asthma symptoms or breathing difficulties if inhaled [Danger Sensitization, respiratory]
• H335: May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]
• H401: Toxic to aquatic life [Hazardous to the aquatic environment, acute hazard]
• H411: Toxic to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard]

Precautionary Statements

• P210, P233, P260, P261, P264, P264+P265, P270, P271, P273, P280, P284, P301+P317, P302+P352, P304+P340, P305+P351+P338, P319, P321, P330, P332+P317, P337+P317, P342+P316, P362+P364, P370+P378, P391, P403, P403+P233, P405, and P501

Hazard Classes and Categories

• Flammable liquids – Category 4
• Acute toxicity – Category 4
• Serious eye damage/eye irritation – Category 2
• Specific target organ toxicity – Single exposure – Category 3
• Specific target organ toxicity – Repeated exposure – Category 2
• Hazardous to the aquatic environment – Category 2
• Hazardous to the aquatic environment – Category 2

If you are interested or have any questions, please contact us at support@atomfair.com

Disclaimer: Sold exclusively for laboratory research. Prohibited for commercial use, diagnostics, or human/animal applications. Buyers assume all compliance liability.