Description

Dipotassium 4-(Benzoylamino)-5-Hydroxynaphthalene-2,7-Disulphonate is a high-purity, water-soluble naphthalene derivative primarily used as a key intermediate in the synthesis of specialized dyes and pigments. This compound matters for its ability to impart specific color and functional properties to final products, ensuring consistent batch-to-batch performance. It is needed by manufacturers in the dye and pigment industries, as well as by research and development laboratories focusing on advanced organic synthesis and material science.

Application

• Dye and Pigment Intermediate: A crucial building block for the synthesis of acid dyes, reactive dyes, and high-performance pigments.
• Textile Industry: Used in the production of dyes for coloring nylon, wool, and silk fibers.
• Ink Manufacturing: Serves as a precursor for specialty inks requiring specific solubility and color fastness properties.
• Research & Development: Employed in academic and industrial R&D for developing new chromophores and functional materials.
• Analytical Chemistry: Can be used as a standard or reagent in specific colorimetric assays and analytical methods.
• Specialty Chemicals: Acts as an intermediate for other fine chemicals and photoactive compounds.

Basic Information

Product Name	Dipotassium 4-(Benzoylamino)-5-Hydroxynaphthalene-2,7-Disulphonate
CAS No.	85030-19-9
Molecular Formula	C₁₇H₁₂K₂N₂O₉S₂
Molecular Weight	538.62 g/mol
Synonyms	4-(Benzoylamino)-5-hydroxy-2,7-naphthalenedisulfonic acid dipotassium salt; 5-Hydroxy-4-(phenylcarbonylamino)-2,7-naphthalenedisulfonic acid dipotassium salt; Dipotassium 4-benzamido-5-hydroxy-2,7-naphthalenedisulfonate; Dipotassium 4-(benzoylamino)-5-hydroxynaphthalene-2,7-disulfonate; C.I. 18050; Acid Yellow 40 intermediate; Benzenesulfonic acid, 4-[(aminocarbonyl)amino]-5-hydroxy-2,7-naphthalenedisulfonic acid dipotassium salt (related).
EINECS	285-250-5

Quality Control

Our Dipotassium 4-(Benzoylamino)-5-Hydroxynaphthalene-2,7-Disulphonate is produced under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for identity, purity, and composition. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with each shipment to guarantee traceability and compliance with your quality requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Yellow to brownish-yellow powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear, yellow solution

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