1-Methylnaphthalene

Also known as: 1 Methyl Napthalene, 1-METHYLNAPHTHALENE FOR SYNTHESIS, 1-METHYLNAPHTHYLENE, 1-Methyl Naphtalene, 1-Methyl-naphthalene, 1-Methylnaphthene, 1-Methylnapththalene, 1-methyl-naphthalen, 1-methylnaphtalene, 1-methylnaphthalene, A-METHYLNAPHTHALENE, ALPHA-METHYLNAPHTHALENE, EINECS 201-966-8, FEMA 3193, Fasudil Impurity 12, L66J B1, MFCD00004034, Methyl-1-naphthalene, Naphthalene, 1-methyl-, femanumber3193

1-Methylnaphthalene (CAS 90-12-0) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C11H10 and a molecular weight of 142.197 g/mol. Key properties include a melting point of -22ºC, a boiling point of 242.8±3.0 °C at 760 mmHg, a density of 1.0±0.1 g/cm3 and a flash point of 82.2±0.0 °C. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed and H411 — Toxic to aquatic life with long lasting effects. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 90-12-0
Jingsj CID: J-43481-0
Molecular Formula: C₁₁H₁₀
Molecular Weight: 142.197 g/mol
Category: Aromatic Hydrocarbons
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	-22ºC
Boiling Point	242.8±3.0 °C at 760 mmHg
Density	1.0±0.1 g/cm3
Flash Point	82.2±0.0 °C
Exact Mass	142.078247
LogP	3.91
Vapor Pressure	0.1±0.2 mmHg at 25°C
Refractive Index	1.617
Additional Property	0.026 g/L (25 ºC)

GHS Safety & Compliance

Irritant / Environmental HazardSignal word: Warning

H302 — Harmful if swallowed
H411 — Toxic to aquatic life with long lasting effects

Customs & Trade Information

HS Code	2902909090
Summary	2902909090 other aromatic hydrocarbons。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:2.0%。General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 1-Methylnaphthalene?

The CAS number of 1-Methylnaphthalene is 90-12-0.

What are the molecular formula and molecular weight of 1-Methylnaphthalene?

1-Methylnaphthalene has molecular formula C11H10 and molecular weight 142.197 g/mol.

Is 1-Methylnaphthalene hazardous?

1-Methylnaphthalene has GHS signal word Warning and hazard statements H302 — Harmful if swallowed; H411 — Toxic to aquatic life with long lasting effects.

What are the upstream and downstream products of 1-Methylnaphthalene?

For 1-Methylnaphthalene, Upstream Products: 1-Bromonaphthalene, 1-Naphthonitrile, 1-Naphthaleneacetamide; Downstream Products: 3-(1-Naphthyl)propionic acid, 4-Methyl-1-naphthonitrile, 4-Methyl-1-naphthaldehyde.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "1-Methylnaphthalene (CAS 90-12-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-43481-0 (accessed 2026-11-07).

Data for reference only; verify product details with suppliers before purchase.