Description

5-Bromonaphthalene-1-Sulfonic Acid is a specialized brominated naphthalene sulfonic acid derivative, serving as a high-value synthetic intermediate in advanced organic synthesis. Its core value lies in the strategic combination of a reactive bromine substituent and a strongly acidic sulfonic acid group, enabling precise functionalization and solubility modification in complex molecular architectures. This compound is essential for researchers and industrial chemists in the pharmaceutical, agrochemical, and specialty dye sectors who require a reliable building block for creating novel active ingredients and functional materials.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly for compounds requiring naphthalene-based scaffolds with enhanced solubility.
• Agrochemical Synthesis: Used in the development of advanced herbicides, fungicides, and plant growth regulators where the bromine atom allows for further cross-coupling reactions.
• Dye and Pigment Manufacturing: Acts as a sulfonating agent and intermediate in the production of acid dyes, reactive dyes, and high-performance pigments.
• Ligand and Catalyst Preparation: Useful for synthesizing specialized ligands for metal catalysis or creating ionic liquids and surfactants due to its strong acid character.
• Polymer Modification: Employed to introduce sulfonic acid groups into polymers for ion-exchange resins, proton-conducting membranes, or to alter polymer solubility.
• Research & Development: A valuable reagent in academic and industrial R&D for exploring new organic reactions and constructing complex heterocyclic systems.

Basic Information

Item	Detail
Product Name	5-Bromonaphthalene-1-Sulfonic Acid
CAS No.	162109-23-1
Molecular Formula	C10H7BrO3S
Molecular Weight	287.13 g/mol
Synonyms	1-Naphthalenesulfonic acid, 5-bromo-; 5-Bromo-1-naphthalenesulfonic acid; 5-Bromonaphthalene-1-sulphonic acid; 5-Bromo-1-naphthalenesulphonic acid; 5-Bromonaphthalenesulfonic Acid; NSC 406914; 5-Bromo-1-naphthalene sulfonic acid
EINECS	Contact for details

Quality Control

Our 5-Bromonaphthalene-1-Sulfonic Acid is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure high purity and consistent performance. We provide comprehensive Certificates of Analysis (COA) detailing purity, identity, and impurity profiles. Our quality commitment aligns with cGMP principles where applicable, ensuring traceability and reliability for critical applications in regulated industries.

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). This product is hygroscopic (moisture-sensitive) and should be handled in a dry environment to prevent degradation. Keep away from strong bases and incompatible materials.

Specification

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