Parth Industries

Direct Brown 44 (C.I. 35005) is a multi-azo, water-soluble direct dye known for its rich, warm brown shade and consistent performance across a variety of applications. Widely used in the paper, textile, wood, leather, and ink industries, it provides reliable, uniform coloration on cellulose-based substrates and is particularly valued for its effectiveness in both bulk and surface dyeing processes.

With CAS number 6252-62-6, Direct Brown 44 has the chemical formula C₃₀H₂₄N₁₂Na₂O₆S₂ and a molecular weight of approximately 758.7 g/mol. It is typically supplied as a powder, often packaged in 25 kg drums or boxes for industrial-scale use.

The dye is fully soluble in water, with slight solubility in ethanol and acetone. Its color behavior is pH-sensitive—shifting to black under strong acidic conditions and to red-brown in alkaline environments. Fastness ratings (ISO scale) include acid fastness at 4, alkali at 5, and moderate ratings of 2 for light, wash, and water fastness.

Direct Brown 44 is prized for delivering stable, warm brown hues in a wide range of applications, including printing and dyeing of paper, wood staining, leather finishing, and ink formulation. Its dependable performance makes it a versatile and practical solution for manufacturers seeking consistent color results in both artistic and industrial settings.