Description

Benzoic acid, 2-hydroxy-, monosodium salt, coupled with 6(or 7)-amino-4-hydroxy-2-naphthalenesulfonic acid and diazotized 2-(4-aminophenyl)-1H-benzimidazol-5-amine, sodium salt is a complex, high-value azo dye intermediate. This compound is engineered to deliver exceptional color strength and structural stability in demanding applications. It is primarily required by manufacturers in the textile, specialty ink, and high-performance pigment industries seeking to produce vivid and durable colors.

Application

• Primary Intermediate for Azo Dyes & Pigments: Serves as a critical building block for synthesizing high-performance red, violet, and black azo dyes.
• Textile Dyeing: Used in the coloration of natural and synthetic fibers, including cotton, wool, and polyamide, requiring good wash and light fastness.
• Specialty Ink Formulation: Imparts intense coloration in inks for packaging, security printing, and digital textile printing.
• Industrial Pigments: Employed in the production of pigments for plastics, coatings, and masterbatches.
• Leather Finishing: Used in dyeing processes for leather goods to achieve deep, uniform shades.
• Research & Development: Acts as a key reagent in chemical research for developing novel chromophores and functional dyes.

Basic Information

Product Name	Benzoic acid, 2-hydroxy-, monosodium salt, coupled with 6(or 7)-amino-4-hydroxy-2-naphthalenesulfonic acid and diazotized 2-(4-aminophenyl)-1H-benzimidazol-5-amine, sodium salt
CAS No.	90218-93-2
Molecular Formula	C30H21N5Na2O8S2 (Tentative, based on structure)
Molecular Weight	705.63 g/mol (Tentative)
Synonyms	2-Hydroxybenzoic acid, monosodium salt, coupled with 6(or 7)-amino-4-hydroxy-2-naphthalenesulfonic acid and diazotized 2-(4-aminophenyl)-1H-benzimidazol-5-amine, sodium salt; Azo dye intermediate derived from salicylic acid and J-acid; Benzimidazole-based azo coupling product; Sodium 5-[(E)-[4-[(5-amino-1H-benzimidazol-2-yl)phenyl]diazenyl]-2-hydroxy-3-sulfonatonaphthalen-1-yl]diazenyl-2-hydroxybenzoate (Tentative IUPAC); Complex Azo Dye Salt CAS 90218-93-2; Acid Dye Intermediate 90218-93-2.
EINECS	Contact for details

Quality Control

Our production of this advanced intermediate adheres to strict quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistent performance and batch-to-batch reproducibility. Certificates of Analysis (COA) detailing purity, impurity profile, and other critical parameters are available upon request to support your quality assurance and regulatory needs.

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 product is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed to prevent absorption of atmospheric moisture, which may affect performance.

Specification

Item	Specification
Appearance	Dark colored powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content (KF)	Max. 5.0%
Solubility (1% in Water)	Complete solution, may have color
Heavy Metals (as Pb)	Max. 20 ppm
Related Substances (HPLC)	Total impurities ≤ 5.0%

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