Description

Chromium, 8-[(5-Chloro-2-Hydroxyphenyl)Azo]-7-Hydroxy-1,3-Naphthalenedisulfonic Acid Complex is a high-purity, metal-complex azo dye known for its excellent light and wash fastness properties. This complex is valued for its ability to provide durable, vibrant coloration, particularly in demanding industrial applications where stability is paramount. It is primarily sought after by manufacturers in the textile, leather, and specialty coatings industries for dyeing and printing processes.

Application

• Textile Dyeing: Used for dyeing wool, nylon, and silk, offering excellent color fastness to light and washing.
• Leather Finishing: Applied in the dyeing of leather goods to achieve rich, stable colors.
• Ink Formulation: Serves as a colorant in the production of specialty inks for various printing applications.
• Paper Coloration: Employed in the manufacture of high-grade colored papers.
• Pigment Preparation: Can be used as a precursor or component in the synthesis of complex inorganic pigments.
• Research & Development: Utilized in chemical research as a model compound for studying metal-complex dye chemistry and properties.

Basic Information

Item	Detail
Product Name	Chromium, 8-[(5-Chloro-2-Hydroxyphenyl)Azo]-7-Hydroxy-1,3-Naphthalenedisulfonic Acid Complex
CAS No.	6407-99-4
Molecular Formula	C16H9ClCrN2O8S2
Molecular Weight	492.83 g/mol
Synonyms	Acid Chrome Brown K; C.I. Mordant Brown 33; Chromium Complex of 8-[(5-Chloro-2-hydroxyphenyl)azo]-7-hydroxy-1,3-naphthalenedisulfonic acid; Mordant Brown 33; C.I. 13250; 5-Chloro-2-[(7-hydroxy-6-sulfo-8-sulfo-2-naphthyl)azo]phenol chromium complex; Chromium(3+) 5-chloro-2-[2-(7-hydroxy-6,8-disulfonaphthalen-1-yl)hydrazinylidene]phenolate
EINECS	229-088-6

Quality Control

Our Chromium, 8-[(5-Chloro-2-Hydroxyphenyl)Azo]-7-Hydroxy-1,3-Naphthalenedisulfonic Acid Complex is produced under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure it meets precise specifications for identity, purity, and performance. A Certificate of Analysis (COA) detailing assay, impurity profile, and physical characteristics is provided with each shipment to guarantee traceability and compliance.

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 incompatible materials and sources of heat. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (Chromium Content)	Min. 98.0%
Loss on Drying	Max. 5.0%
Sulfated Ash	Max. 1.0%
Heavy Metals (as Pb)	Max. 20 ppm
Solubility (in Water)	Completely soluble

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