Description

C.I. Acid Brown 45 is a synthetic azo dye belonging to the acid dye class, widely recognized for its specific brown hue and affinity for protein-based fibers. This product is valued for its consistent color strength and good leveling properties, which are critical for achieving uniform dyeing results in industrial applications. It is primarily utilized by manufacturers in the textile, leather, and paper industries for coloring wool, silk, nylon, and other polyamide materials.

Application

• Primary dyeing of wool and silk fabrics and yarns.
• Coloration of nylon and other synthetic polyamide fibers.
• Leather finishing and dyeing for upholstery, garments, and accessories.
• Paper coating and tinting for specialty packaging and decorative papers.
• Ink formulation for specific printing applications requiring acid dye properties.
• As a colorant for food-grade and non-food-grade casings, where regulations permit.

Basic Information

Item	Detail
Product Name	C.I. Acid Brown 45
CAS No.	12219-54-4
Molecular Formula	C22H14N6Na2O9S2
Molecular Weight	624.49 g/mol
Synonyms	Acid Brown 45; Acid Leather Brown D; C.I. 34905; Acid Brown D; Acid Fast Brown G; Lanasyn Brown S-RL; Supranol Fast Brown RL; Telon Fast Brown ANL; Acid Brown G; Acid Brown RL
EINECS	Contact for details

Quality Control

Our production of C.I. Acid Brown 45 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Each lot is tested for critical parameters including color strength, shade, solubility, and impurity profile. Certificates of Analysis (COA) documenting these results are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Brown powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Shade	Conforms to standard
Solubility in Water	Conforms

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.