Description

Acid Brown 355 is a synthetic organic dye belonging to the acid dye class, widely recognized for its application in textile coloration. Its primary value lies in providing durable, vibrant brown shades with excellent affinity for protein fibers like wool, silk, and nylon. This dye is essential for manufacturers in the textile and leather industries seeking consistent color results and good fastness properties. The compound is supplied as a high-purity material to ensure reliable performance in demanding industrial dyeing processes.

Application

• Primary dyeing of wool and wool-blend fabrics.
• Coloration of silk textiles and garments.
• Dyeing of nylon fibers for apparel and carpets.
• Leather finishing and coloration.
• Specialty applications in paper coloration.
• Used in the formulation of ink and toner.

Basic Information

Product Name	Acid Brown 355
CAS No.	60181-77-3
Molecular Formula	C32H21N5Na4O19S6
Molecular Weight	1103.98 g/mol
Synonyms	Acid Brown 355; C.I. Acid Brown 355; Acid Leather Brown 2GL; Acid Brown GL; Acid Brown A-GL; Brown 355; Acid Fast Brown GL; Lanasyn Brown 2GL
EINECS	Contact for details

Quality Control

Our Acid Brown 355 is manufactured under a strict quality management system to ensure batch-to-batch consistency and high purity. The product undergoes rigorous testing, including spectrophotometric analysis for color strength and chromatographic methods to confirm identity and purity. A comprehensive Certificate of Analysis (COA) detailing assay, shade, solubility, and fastness properties is provided with each shipment to guarantee it meets your technical specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed when not in use to prevent moisture absorption, which can affect product performance.

Specification

Item	Specification
Appearance	Brown Powder
Identification (IR)	Conforms
Assay (Color Strength)	≥ 98%
Moisture Content	≤ 5.0%
Water Solubility	Conforms
Shade	Standard
Fastness Properties	To Customer Requirement

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