Description

Mordant Brown 4 is a synthetic organic dye belonging to the mordant dye class, widely recognized for its ability to form stable, colored complexes with metal ions. This property is crucial for achieving durable and wash-fast coloration on various substrates, particularly natural fibers. It is an essential chemical for industries requiring robust and vibrant brown shades with excellent light and wet fastness properties. Key users include textile manufacturers, leather tanneries, and producers of specialty inks and coatings.

Application

• Textile Dyeing: Primarily used for dyeing wool, silk, and nylon, where it forms complexes with chromium or aluminum mordants to produce fast brown hues.
• Leather Coloring: Employed in the tanning and finishing of leather goods to impart rich, stable brown colors.
• Wood Staining: Used in formulations for staining wood, providing deep, penetrating color that highlights grain patterns.
• Paper Coloring: Applied in the production of specialty colored papers and boards.
• Biological Staining: Can be utilized as a histological stain in laboratory settings for microscopic analysis.
• Ink Manufacturing: A component in the formulation of certain specialty inks for printing and marking.

Basic Information

Product Name	Mordant Brown 4
CAS No.	6247-27-4
Molecular Formula	C13H9N4NaO5S
Molecular Weight	356.29 g/mol
Synonyms	Acid Chrome Brown G; C.I. Mordant Brown 4; C.I. 13850; Chrome Brown G; Diamond Brown G; Eriochrome Brown G; Mordant Brown G; Solochrome Brown G; 5-[(2,4-Dihydroxyphenyl)azo]-2-hydroxybenzenesulfonic acid, monosodium salt
EINECS	228-374-9

Quality Control

Our Mordant Brown 4 is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure consistency in strength, shade, and purity. Key parameters such as dye content, solubility, and fastness properties are verified. 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed when not in use to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Brown powder or granules
Identification (IR)	Conforms to standard
Dye Content (Assay)	≥ 90%
Moisture Content	≤ 5.0%
Water Solubility	Conforms
Shade	Conforms to standard pattern
Fastness Properties (Light, Wash)	Grade 4-5 (Typical)

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