1,3-Bis(1,3-dihydro-1,3,3-trimethyl-2H-indol-2-ylidene)-2-propanone

1,3-Bis(1,3,3-trimethyl-2-indolinylidene)-2-propanone

CAS: 24293-93-4

🔹 Basic Information

• Molecular features: Contains two 1,3,3-trimethyl-2-indolinyl units linked by a 2-propanone bridge.

• Structural characteristics: The two indolinyl groups form a conjugated system, which serves as a chromophore in dye molecules.

🔹 Main Uses

1. Dye / Pigment Intermediate

   • Mainly used as an intermediate in the synthesis of reactive dyes or acid dyes;

   • Can undergo further reactions to produce indolinyl dyes, oil-soluble pigments, or photosensitive dyes;

   • Widely applied in textiles, inks, leather, and related industries.

2. Coloring and Film-forming Agent

   • The indolinylidene structure provides good coloring properties and lightfastness;

   • Acts as a key intermediate in dye synthesis, helping to adjust absorption wavelength and color tone.

3. Optical / Photosensitive Materials (Research Applications)

   • This type of compound can also be used in photosensitive polymers or optoelectronic material research as a conjugated dye unit.

🔹 Properties and Precautions

• Physical form: Solid powder, usually light brown to yellow.

• Solubility: Soluble in organic solvents such as ethanol, acetone, DMF, etc.

• Safety: Standard organic dye intermediate; avoid inhalation of dust and skin contact.

🔹 Summary

✅ One-sentence summary:

This is an indolinyl dye intermediate used for preparing textile and ink dyes, allowing adjustment of color, coloring properties, and lightfastness.