Direct Yellow R (Direct Yellow 11)

Direct Yellow R (C.I. Direct Yellow 11) is a high-performance direct dye known for its vibrant and consistent yellow hue. Ideal for dyeing cellulosic fibers such as cotton, linen, and rayon, this dye offers excellent color strength and stability. Its versatility makes it suitable for a wide range of applications, including textiles, paper products, and more.

Chemical and Technical Specifications:

• Chemical Name: 4-(4-(Dimethylamino)phenylazo)phenylazophenol

• C.I. Number: 11

• Molecular Formula: C19H16N4O2

• Molecular Weight: 312.36 g/mol

• Solubility: Soluble in water; forms a stable dye solution

• Dyeing Method: Direct dyeing

• Lightfastness (Blue Wool Scale): 4 (good resistance to light exposure)

• Washfastness: Good, rated 3-4

• Rubbing Fastness: Good, rated 4

• pH Range: Effective in neutral to slightly alkaline conditions during dyeing

• Appearance: Bright yellow powder

Industrial Applications:

1. Textile Industry:
   Direct Yellow R is widely used in the textile industry for dyeing cellulosic fibers such as cotton, linen, and rayon. It imparts a vivid yellow color with excellent wash and lightfastness properties, making it suitable for various textile applications including apparel, home textiles, and fashion accessories.

2. Paper Industry:
   In the paper industry, Direct Yellow R is employed to achieve bright yellow shades in various paper products, including packaging materials, decorative papers, and specialty papers. Its high color strength ensures consistent and brilliant yellow coloration.

3. Inks and Coatings:
   This dye is also utilized in the formulation of inks and coatings, providing vibrant yellow hues with reliable performance. It is ideal for applications requiring high color intensity and stability, including printing inks and surface coatings.

4. Consumer Goods:
   Direct Yellow R is used in consumer products such as bedding, upholstery, and curtains, offering a bright yellow color with good durability and resistance to fading.

Key Performance Benefits:

• Bright Yellow Coloration: Delivers a vibrant yellow shade with high color strength and uniformity, enhancing the visual appeal of the final product.

• Excellent Fastness Properties: Provides superior resistance to light, washing, and rubbing, ensuring long-lasting color retention and reducing the frequency of re-dyeing.

• Stable Dye Solution: Forms a consistent and stable dye solution in aqueous conditions, ensuring reliable and high-quality dyeing results across various materials.

• Versatile Application: Adaptable for use in textiles, paper products, and inks, offering flexibility in different industrial and consumer applications.

• High Durability: Ensures robust colorfastness and resistance to fading, making it ideal for products that require durability and long-term performance.