Description

3-Amino-5-Hydroxy-2,7-Naphthalenedisulfonic Acid Monosodium Salt is a high-purity, functionalized naphthalene derivative essential as a key intermediate in the synthesis of advanced dyes and pigments. Its unique structure, featuring both amino and hydroxy groups on a disulfonic acid backbone, provides critical coupling and chelating properties for creating vivid, stable colors. This compound is primarily required by manufacturers in the dyestuff, textile, and specialty chemical industries for producing high-performance azo dyes, acid dyes, and reactive dyes.

Application

• Primary Intermediate for Azo Dyes: Serves as a crucial diazo component or coupling agent in the manufacture of high-value azo dyes for textiles, leather, and paper.
• Acid Dye Synthesis: Used in the production of acid dyes, which are important for coloring nylon, silk, wool, and modified acrylic fibers.
• Reactive Dye Precursor: Acts as a key building block in the synthesis of reactive dyes that form covalent bonds with cellulose fibers like cotton, ensuring excellent wash-fastness.
• Pigment Manufacturing: Employed in the creation of organic pigments for inks, plastics, and coatings, where color strength and stability are paramount.
• Chemical Research & Development: Utilized in R&D laboratories for developing novel chromophores and functional materials.
• Complexing Agent: Its structure allows it to act as a ligand or complexing agent in certain metallurgical or analytical chemistry applications.

Basic Information

Product Name	3-Amino-5-Hydroxy-2,7-Naphthalenedisulfonic Acid Monosodium Salt
CAS No.	61702-42-9
Molecular Formula	C10H8NNaO7S2
Molecular Weight	349.29 g/mol
Synonyms	3-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid sodium salt; 5-Amino-7-hydroxy-1,3-naphthalenedisulfonic acid monosodium salt; 1,3-Naphthalenedisulfonic acid, 5-amino-7-hydroxy-, monosodium salt; H acid monosodium salt (related derivative); Azoic diazo component; Acid dye intermediate; Naphthalene sulfonic acid derivative
EINECS	Contact for details

Quality Control

Our 3-Amino-5-Hydroxy-2,7-Naphthalenedisulfonic Acid Monosodium Salt 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 specifications for dye intermediate applications. Certificates of Analysis (COA) documenting batch-specific results 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, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture, which can affect quality and handling properties.

Specification

Item	Specification
Appearance	Off-white to light brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
pH (1% Solution)	6.0 - 8.0
Sulfate Ash	≤ 20.0%

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