Description

4-Bromonaphthalene-1-Sulfonic Acid is a versatile brominated naphthalene sulfonic acid derivative, serving as a key intermediate in advanced organic synthesis. Its value lies in the unique reactivity imparted by the combination of a bromine substituent and a sulfonic acid group on the naphthalene ring, enabling precise functionalization. This compound is essential for researchers and manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries who require a high-purity building block for creating complex molecules, dyes, and functional materials.

Application

• Pharmaceutical Intermediate: A crucial building block in the synthesis of active pharmaceutical ingredients (APIs), particularly for compounds with naphthalene-based structures.
• Agrochemical Synthesis: Used in the research and production of advanced herbicides, fungicides, and other crop protection agents.
• Dye and Pigment Manufacturing: Serves as a precursor for synthesizing brominated azo dyes, acid dyes, and other colored compounds with enhanced properties.
• Functional Material Research: Employed in the development of organic semiconductors, liquid crystals, and photoactive materials due to its electron-withdrawing sulfonic acid group.
• Chemical Research & Development: A valuable reagent for coupling reactions (e.g., Suzuki, Buchwald-Hartwig) and for introducing sulfonate functionalities into target molecules.
• Surfactant and Detergent Intermediate: Can be utilized to create specialized anionic surfactants for industrial and formulation chemistry.

Basic Information

Product Name	4-Bromonaphthalene-1-Sulfonic Acid
CAS No.	162109-20-8
Molecular Formula	C₁₀H₇BrO₃S
Molecular Weight	287.13 g/mol
Synonyms	1-Naphthalenesulfonic acid, 4-bromo-; 4-Bromo-1-naphthalenesulfonic acid; 4-Bromonaphthalenesulfonic acid; NSC 406903; 4-Bromo-1-naphthalenesulphonic acid; 4-Bromonaphthalene-1-sulphonic acid
EINECS	Contact for details

Quality Control

Our 4-Bromonaphthalene-1-Sulfonic Acid is manufactured under strict quality management protocols. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets the high standards required for research and industrial synthesis. Certificates of Analysis (COA) detailing 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, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and should be handled in a dry environment to prevent degradation. Keep away from strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 20 ppm

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