Description

4-Amino-5-(Tosyloxy)Naphthalene-2,7-Disulfonic Acid is a specialized organic intermediate featuring a naphthalene core with sulfonic acid and tosyl-protected amino functionalities. This compound matters for its role as a key building block in the synthesis of complex dyes, pigments, and fluorescent markers, where its multi-functional structure allows for precise chemical modifications. Industries such as specialty chemicals, advanced material science, and analytical reagent manufacturing need this high-purity intermediate to develop products with specific optical and chemical properties.

Application

• Key intermediate in the synthesis of azo dyes and acid dyes for textiles and leather.
• Precursor for manufacturing fluorescent whitening agents (FWAs) and optical brighteners.
• Building block for specialty pigments used in inks, coatings, and plastics.
• Intermediate in the production of biologically active compounds and pharmaceutical research chemicals.
• Used in the development of analytical reagents and chemical sensors due to its sulfonic acid groups.
• Starting material for functional polymers and advanced organic materials.

Basic Information

Product Name	4-Amino-5-(Tosyloxy)Naphthalene-2,7-Disulfonic Acid
CAS No.	6837-93-0
Molecular Formula	C₁₇H₁₅NO₈S₃
Molecular Weight	473.50 g/mol
Synonyms	4-Amino-5-[(4-methylphenyl)sulfonyl]oxy]naphthalene-2,7-disulfonic Acid; 5-Amino-6-(p-toluenesulfonyloxy)-2,7-naphthalenedisulfonic Acid; 2,7-Naphthalenedisulfonic acid, 4-amino-5-[(4-methylphenyl)sulfonyl]oxy]-; 4-Amino-5-(p-toluenesulfonyloxy)-2,7-naphthalenedisulfonic Acid; 6837-93-0; Amino Tosyloxy Naphthalene Disulfonate; ATND Acid
EINECS	Contact for details

Quality Control

Our 4-Amino-5-(Tosyloxy)Naphthalene-2,7-Disulfonic Acid is manufactured under strict process controls to ensure batch-to-batch consistency and high purity suitable for synthetic applications. Quality is verified through a comprehensive suite of analytical techniques including HPLC, NMR, and titration. A Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment to support your quality assurance protocols.

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 to prevent absorption of atmospheric moisture, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Off-white to light yellow powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Related Substances (HPLC)	Total impurities ≤ 4.0%
Solubility	Soluble in alkaline aqueous solutions

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