Description

7-Chloronaphthalene-2-Sulfonic Acid is a specialized aromatic sulfonic acid derivative that serves as a versatile and high-value chemical intermediate. Its unique structure, combining a chlorinated naphthalene backbone with a sulfonic acid group, makes it a critical building block for synthesizing complex molecules with tailored properties. This compound is essential for manufacturers and R&D teams in the pharmaceutical, agrochemical, and advanced materials sectors seeking to develop new active ingredients or functional dyes.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly for compounds requiring a naphthalene sulfonate scaffold.
• Agrochemical Synthesis: Used in the production of advanced herbicides, fungicides, and plant growth regulators where its chlorinated aromatic system provides biological activity.
• Dye and Pigment Manufacturing: Functions as a crucial intermediate for creating azo dyes, acid dyes, and other high-performance colorants for textiles and plastics.
• Chemical Research & Development: Employed in organic synthesis for constructing complex molecular architectures in academic and industrial R&D settings.
• Surfactant and Detergent Industry: Acts as a starting material for producing specialized anionic surfactants with unique solubility and surface-active properties.
• Polymer Modification: Utilized to introduce sulfonic acid groups into polymers, enhancing properties like hydrophilicity, ion-exchange capacity, or dyeability.

Basic Information

Product Name	7-Chloronaphthalene-2-Sulfonic Acid
CAS No.	102878-15-9
Molecular Formula	C10H7ClO3S
Molecular Weight	242.68 g/mol
Synonyms	2-Naphthalenesulfonic acid, 7-chloro-; 7-Chloro-2-naphthalenesulfonic acid; 7-Chloronaphthalene-2-sulphonic acid; 7-Chloro-2-naphthylsulfonic acid; 7-Chloro-β-naphthalenesulfonic acid; 7-Chloronaphthalenesulfonic acid; 7-Chloronaphthalene-2-SO3H; 7-Cl-2-NSA
EINECS	Contact for details

Quality Control

Our 7-Chloronaphthalene-2-Sulfonic Acid is produced under stringent quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting standards for high-purity intermediates. Certificates of Analysis (COA) documenting all critical parameters are provided with each shipment to guarantee traceability and consistency for your sensitive synthesis processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). Due to its strong acid nature, keep away from incompatible materials such as strong bases and oxidizing agents. The container must be kept tightly sealed to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Off-white to light yellow crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 2.0%

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