The vibrant colors that surround us are often the result of intricate chemical processes, with specialized intermediates playing a crucial role. 1-Methylamino-4-bromo Anthraquinone (CAS 128-93-8) is one such compound, a cornerstone in the creation of specific dyes and a valuable player in organic synthesis. Understanding its fundamental chemical and physical properties is key for any professional looking to utilize or procure this versatile molecule.

At its core, 1-Methylamino-4-bromo Anthraquinone is a derivative of anthraquinone, a polycyclic aromatic organic compound known for its stability and chromophoric properties. The molecular formula C15H10BrNO2 indicates a structure comprising a fused ring system with two carbonyl groups (forming the quinone) and the substituents of a methylamino group (-NHCH3) and a bromine atom (-Br) attached to specific positions on the rings. This precise arrangement is what dictates its reactivity and suitability for various applications.

Key Physical Properties:

  • Appearance: One of the most readily identifiable properties is its appearance – typically a dark red powder. This visual characteristic is important for quality control and identification in industrial settings.
  • Purity: For its intended applications, high purity is paramount. Manufacturers often guarantee an assay of ≥99%, ensuring minimal interference from impurities in synthesis reactions or dye formulations.
  • Molecular Weight: The molecular weight is approximately 316.15 g/mol. This figure is essential for stoichiometric calculations in synthesis and for analytical purposes.
  • Melting Point: The melting point typically falls within the range of 184-187°C, although some sources may cite slightly different values. This property is crucial for determining appropriate processing temperatures and understanding thermal stability.

Chemical Reactivity and Applications:

The presence of the bromine atom on the anthraquinone ring makes 1-Methylamino-4-bromo Anthraquinone an excellent substrate for nucleophilic aromatic substitution and various cross-coupling reactions. This reactivity is precisely why it serves as a vital intermediate:

  • Dye Synthesis: The anthraquinone moiety is a powerful chromophore. The substituents modulate the electronic properties, allowing for the synthesis of dyes with specific absorption wavelengths, hence producing distinct colors. The bromine atom can be further reacted to incorporate different functional groups, leading to a wide array of specialized dyes for textiles, inks, and other materials.
  • Organic Synthesis: Beyond dyes, the bromine atom acts as a handle for further functionalization. It can be replaced or coupled with other molecules to build more complex organic structures. This makes it a valuable building block for researchers developing novel compounds in fields such as pharmaceuticals or advanced materials.

When considering procurement, understanding these properties helps buyers communicate their needs effectively. Whether you are looking to buy this compound for its vibrant color-forming capabilities or its synthetic versatility, seeking out a reliable manufacturer that provides precise specifications and consistent quality is crucial. Suppliers often detail packaging (e.g., 25kg drums) and storage conditions (cool, dry, away from light) to help preserve these essential properties.

In essence, 1-Methylamino-4-bromo Anthraquinone is more than just a chemical compound; it's a precisely engineered molecule whose properties enable the creation of color and facilitate complex chemical transformations. Its dark red powder form, high purity, and reactive functional groups make it an indispensable intermediate for industries that demand precision and performance.