Description

Mordant Brown 18 is a synthetic organic dye belonging to the mordant dye class, identified by CAS NO 5850-12-4. It is valued for its ability to form stable, colorfast complexes with metal ions, particularly chromium and aluminum, on various substrates. This product is essential for industrial applications requiring durable, wash-fast brown shades on natural fibers like wool and leather, as well as in specialized staining protocols.

Application

• Primary application in the dyeing of wool and wool blends to achieve brown hues with excellent light and wash fastness.
• Used in the leather tanning and finishing industry for coloring leather goods.
• Employed as a biological stain in histology and microscopy for tissue differentiation.
• Potential use in the coloration of silk and nylon fibers where mordant dyeing processes are applicable.
• Utilized in the manufacturing of inks for specialized printing applications.
• Applied in educational and research laboratories for dye chemistry studies and experiments.

Basic Information

Product Name	Mordant Brown 18
CAS No.	5850-12-4
Molecular Formula	C20H12N2Na2O8S2
Molecular Weight	518.42 g/mol
Synonyms	Acid Chrome Brown G; C.I. Mordant Brown 18; Chrome Brown G; C.I. 12205; Mordant Brown G; Acid Chrome Brown 2G; Diamond Brown G; Eriochrome Brown G; Solochrome Brown G
EINECS	227-455-5

Quality Control

Our Mordant Brown 18 is manufactured under a strict quality management system. Each batch is tested to ensure consistent dye strength, shade, and application performance. Key parameters such as purity, solubility, and metal content are verified. A Certificate of Analysis (COA) detailing these specifications is provided with every 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). This material is hygroscopic (moisture-sensitive); keep the original container tightly sealed to minimize exposure to atmospheric humidity.

Specification

Item	Specification
Appearance	Brown powder or granules
Identification (IR)	Conforms to standard
Assay (Dye Content)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Conforms
Ash Content	Max. 1.0%
Shade on Wool (Chrome)	Conforms to reference standard
Fastness Properties	To be specified per grade

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