Description

Acid Brown 311 is a synthetic organic dye belonging to the acid dye class, widely recognized for its application in textile coloration. This product is valued for its ability to provide durable, wash-fast brown shades on protein fibers like wool, silk, and nylon. It is a critical component for manufacturers in the textile and leather industries seeking consistent, high-quality dyeing results. The compound is supplied under the identifier CAS No. 12234-86-5.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and polyamide (nylon) fibers to achieve various brown hues.
• Leather Finishing: Used in the coloration of leather goods, providing rich and uniform brown tones.
• Paper Staining: Employed for tinting specialty papers where color fastness is required.
• Ink Formulation: A component in the manufacture of certain types of inks for industrial marking.
• Biological Staining: Potential use as a histological stain in laboratory settings, subject to specific grade purity.

Basic Information

Product Name	Acid Brown 311
CAS No.	12234-86-5
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Acid Brown 311; C.I. Acid Brown 311; Acid Leather Brown 311; Brown 311 (Acid Dye); Acid Fast Brown 311; Wool Brown 311; Nylon Brown 311; Acid Dye Brown 311
EINECS	Contact for details

Quality Control

Our Acid Brown 311 is manufactured under a strict quality management system to ensure batch-to-batch consistency and performance. Quality parameters including color strength, shade, solubility, and impurity profiles are rigorously tested against established standards. A Certificate of Analysis (COA) detailing specific test results is provided with each shipment to guarantee compliance with your technical requirements.

Storage

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

Specification

Item	Specification
Appearance	Brown powder or granules
Identification	Conforms (IR / HPLC)
Color Strength	100% ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Ash Content	≤ 1.0%
Solubility in Water	Conforms
pH (1% Solution)	6.0 - 8.0

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