Description

3-Isothiocyano-1,5-Naphthalene Disulfonic Acid Disodium Salt is a high-purity, water-soluble organic intermediate characterized by its reactive isothiocyanate and sulfonate functional groups. This compound is valued for its role as a versatile building block in the synthesis of specialized dyes, fluorescent probes, and biologically active molecules. It is primarily sought by manufacturers and research institutions in the fine chemical, pharmaceutical, and analytical reagent sectors for advanced chemical synthesis and labeling applications.

Application

• Fluorescent Probe Synthesis: Acts as a key precursor for creating naphthalene-based fluorescent tags and sensors used in bioimaging and diagnostic assays.
• Reactive Dye Intermediate: Serves as a critical building block in the production of fiber-reactive dyes, particularly for textiles like cotton and wool, due to its sulfonic acid groups enhancing water solubility.
• Bioconjugation & Labeling Reagent: The isothiocyanate group enables covalent bonding with amines, making it useful for labeling proteins, antibodies, and other biomolecules.
• Pharmaceutical Intermediate: Employed in the research and development of novel therapeutic agents and diagnostic compounds.
• Analytical Chemistry: Used in the preparation of derivatization agents for the detection and quantification of amines and amino acids via chromatography.
• Cross-linking Agent: Utilized in material science and polymer chemistry to introduce specific functional groups or create cross-linked networks.

Basic Information

Item	Detail
Product Name	3-Isothiocyano-1,5-Naphthalene Disulfonic Acid Disodium Salt
CAS No.	35888-63-2
Molecular Formula	C11H5NNa2O6S3
Molecular Weight	421.33 g/mol
Synonyms	1,5-Naphthalenedisulfonic acid, 3-isothiocyanato-, disodium salt; 3-Isothiocyanato-1,5-naphthalenedisulfonic acid disodium salt; Disodium 3-isothiocyanatonaphthalene-1,5-disulfonate; Naphthalene-1,5-disulfonic acid, 3-isothiocyanato-, sodium salt (1:2); 3-Isothiocyanato-1,5-NDS disodium salt; Reactive dye intermediate K; NTCDS
EINECS	Contact for details

Quality Control

Our 3-Isothiocyano-1,5-Naphthalene Disulfonic Acid Disodium 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 exacting standards for research and industrial use. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee traceability and consistency.

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); therefore, the container must be kept tightly sealed to minimize exposure to atmospheric humidity.

Specification

Item	Specification
Appearance	Yellow to light brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Solubility (1% in Water)	Clear, yellow solution

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