Description

7-Hydroxy-8-[[4-[1-[4-[(4-Hydroxyphenyl)Azo]Phenyl]Cyclohexyl]Phenyl]Azo]Naphthalene-1,3-Disulphonic Acid is a high-purity, synthetic azo dye intermediate of significant industrial importance. Its complex molecular structure, featuring multiple azo linkages and sulfonic acid groups, makes it a critical precursor for producing vivid and stable colorants. This compound is essential for manufacturers in the dye and pigment industries seeking to develop specialized, high-performance color products for demanding applications.

Application

• Primary Intermediate for Azo Dyes & Pigments: Serves as a key building block in the synthesis of high-value, complex azo dyes, particularly for shades of yellow, orange, and red.
• Textile Dye Manufacturing: Used in the production of dyes for coloring natural and synthetic fibers, where lightfastness and washfastness are critical.
• Industrial Pigment Production: A vital component in creating organic pigments for plastics, paints, inks, and coatings that require excellent color strength and durability.
• Specialty Colorant Synthesis: Employed in research and development of novel colorants for niche applications, including security inks and functional dyes.
• Liquid Crystal Dye (LCD) Precursor: Potential use in the synthesis of dichroic dyes for display technologies due to its elongated, conjugated structure.

Basic Information

Product Name	7-Hydroxy-8-[[4-[1-[4-[(4-Hydroxyphenyl)Azo]Phenyl]Cyclohexyl]Phenyl]Azo]Naphthalene-1,3-Disulphonic Acid
CAS No.	93919-33-6
Molecular Formula	C34H28N4O8S2
Molecular Weight	684.73 g/mol
Synonyms	7-Hydroxy-8-({4-[1-(4-{(E)-[4-(Hydroxy-κO)phenyl]diazenyl-κN1}phenyl)cyclohexyl]phenyl}diazenyl-κN1)naphthalene-1,3-disulfonic acid; Azo Dye Intermediate 93919-33-6; CI 26080 (related class); 1,3-Naphthalenedisulfonic acid, 7-hydroxy-8-[[4-[1-[4-[(4-hydroxyphenyl)azo]phenyl]cyclohexyl]phenyl]azo]-; Disazo dye intermediate based on H-acid and cyclohexylbenzene.
EINECS	Contact for details

Quality Control

Our 7-Hydroxy-8-[[4-[1-[4-[(4-Hydroxyphenyl)Azo]Phenyl]Cyclohexyl]Phenyl]Azo]Naphthalene-1,3-Disulphonic Acid is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and consistent batch-to-batch performance. Certificates of Analysis (COA) documenting all critical parameters are provided with every shipment.

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 degradation from atmospheric moisture. Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 1.0%; Total impurities ≤ 3.0%

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