2-Methylquinoline

CAS Number
91-63-4
EC Number
202-085-1

What is 2-Methylquinoline?

2-Methylquinoline (CAS 91-63-4), also marketed as Quinaldine, is a nitrogen-containing heterocyclic compound used in pharmaceutical synthesis, dye manufacturing and specialty chemical production.

Where is 2-Methylquinoline used?

  • Pharmaceutical manufacturing: key synthetic intermediate for antimalarial compounds such as quinine derivatives and other bioactive heterocyclic APIs
  • Polymer and plastics: stabilizer and antioxidant precursor, useful in formulations requiring protection against thermal degradation
  • Dye and pigment chemistry: synthesis of quinoline yellow and related colorants for food-contact and industrial coatings
  • Flavor and fragrance: incorporated at controlled concentrations for its characteristic quinoline note
  • It functions as a building block and intermediate for more complex active molecules and functional materials.

Commercial specifications

  • Technical and high-purity grades
  • Purity levels of 98% and above
  • Packaging from small laboratory quantities to drum volumes

Other Names (Synonyms)

Quinaldine

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What are the physical properties of 2-Methylquinoline?

Melting Point -1.5 °C
Boiling Point 80-81 °C @ Press: 2 Torr
Density 1.0600 g/cm³ @ Temp: 20 °C
Flash Point 175 °F
Appearance yellowish-brown liquid
Color White to slightly yellow
Form Crystalline Powder
Water Solubility PRACTICALLY INSOLUBLE
Vapor Pressure <0.1 hPa (20 °C)
Refractive Index n 20/D 1.612(lit.)
pH 6.9 (H2O, 20℃)(saturated aqueous solution)
Log P 2.59

How is 2-Methylquinoline classified and handled safely? Learn More

Warning
GHS07· Irritant GHS08· Health Hazard

Hazard Statements

H302 Harmful if swallowed
H312 Harmful in contact with skin
H315 Causes skin irritation
H319 Causes serious eye irritation

Precautionary Statements

P203 Obtain, consult and follow expert instructions for use.
P264 Wash … thoroughly after handling.
P270 Do not eat, drink or smoke when using this product.
P273 Avoid release to the environment.

Which trade and regulatory codes apply to 2-Methylquinoline?

HS Code 29334990
Packing Group III
Storage Class 10 - Combustible liquids
WGK (Germany) 3
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