‌3-Methylaniline (also known as m-toluidine) has a wide range of uses, mainly reflected in the following aspects:

‌Chemical and dye intermediates‌: 3-Methylaniline is an important intermediate for the manufacture of cationic dyes, color film developers and vat dyes, such as Reactive Yellow X-R, Cationic Violet 2RL, etc. At the same time, it is also a solvent for polyester resins and an additive for polyaminocresol ethyl foam plastics.
‌Analytical reagents and assay uses‌: This substance is also used as an analytical reagent and can be used to assay osmium, palladium, platinum, ruthenium and nitrite.
‌Polymer material preparation‌: In the field of materials science, 3-methylaniline is involved in the preparation of conductive polymer-based electrochromic films and hydrolysis-resistant polycarbonate composites, showing its wide application in the field of polymer materials.

In addition, 3-methylaniline is a colorless oily liquid and needs to be stored in a ventilated, low-temperature, dry environment and separated from oxidants, acids, and food additives.

In summary, 3-methylaniline has important applications in many fields such as chemical industry, dyes, materials science, and analytical testing.

m-Toluidine Chemical Properties
Melting point -30 °C
Boiling point 203-204 °C(lit.)
density 0.999 g/mL at 25 °C(lit.)
vapor pressure 0.3 hPa (20 °C)
refractive index n20/D 1.567(lit.)
Fp 186 °F
storage temp. Store below +30°C.
solubility 0.2 g/100 mL (20°C)
pka 4.73(at 25℃)
form Crystalline Solid or Liquid
color White
Odor aromatic aniline-like odor
PH 7 (H2O, 20℃)
Water Solubility 0.2 g/100 mL (20 ºC)
Merck 14,9536
BRN 635944
Exposure limits TLV-TWA skin 2-ppm (～9 mg/m3) (ACGIH).
Dielectric constant 5.9500000000000002
InChIKey JJYPMNFTHPTTDI-UHFFFAOYSA-N
LogP 1.4 at 25℃

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