Description

1-Diazo-2-Naphthol-4-Sulfonic Acid is a specialized diazonium salt derivative of naphthalene, valued for its role as a key photoresist component and versatile chemical intermediate. Its significance lies in its ability to undergo photochemical and coupling reactions, making it essential for creating precise patterns in microelectronics and generating specific azo dyes. This compound is primarily needed by manufacturers in the electronics industry for photolithography, as well as by fine chemical producers for synthesizing pigments, dyes, and other functional organic molecules.

Application

• Photoresist Formulation: A critical photoactive compound (PAC) in positive photoresists for the semiconductor and microelectronics industry.
• Azo Dye & Pigment Synthesis: Serves as a diazo component in the production of vivid and stable azo dyes and organic pigments.
• Chemical Intermediate: Used in organic synthesis for introducing the naphthol sulfonic acid moiety into more complex molecules.
• Analytical Reagent: Employed in specific colorimetric assays and as a reagent in chemical analysis.
• Functional Material Research: Investigated for use in advanced materials, including light-sensitive polymers and coatings.

Basic Information

Product Name	1-Diazo-2-Naphthol-4-Sulfonic Acid
CAS No.	20541-54-2
Molecular Formula	C₁₀H₆N₂O₄S
Molecular Weight	250.23 g/mol
Synonyms	2-Naphthol-4-sulfonic acid, 1-diazo-; 1-Diazo-2-naphthol-4-sulfonic acid; 4-Sulfo-1-diazo-2-naphthol; 1-Diazo-2-hydroxy-4-naphthalenesulfonic acid; 1,2-Naphthoquinone-1-diazide-4-sulfonic acid (related form); DNQ sulfonate; Diazonaphthol sulfonic acid; Photoresist PAC intermediate
EINECS	243-875-6

Quality Control

Our 1-Diazo-2-Naphthol-4-Sulfonic Acid is manufactured under strict process controls to ensure batch-to-batch consistency and high purity suitable for demanding applications like photoresist formulation. Quality is verified through a comprehensive suite of analytical techniques including HPLC, FT-IR, and titration methods. A detailed Certificate of Analysis (COA) documenting 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 place at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture. Keep away from heat and incompatible materials.

Specification

Item	Specification
Appearance	Yellow to orange powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Solubility	Soluble in alkaline aqueous solutions, polar organic solvents

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