578-85-8

Usage

Uses

Used in Dye and Pigment Production:
1-Naphthol-3,6-disulfonic acid is used as a key intermediate in the synthesis of various dyes and pigments, contributing to the coloration and stability of these products.
Used in Fluorescent Marker Preparation:
1-Naphthol-3,6-disulfonic acid is used as a fluorescent marker in various applications, such as biological imaging and detection, due to its fluorescent properties.
Used as a pH Indicator in Chemical Analysis:
1-Naphthol-3,6-disulfonic acid is used as a pH indicator for detecting strong acids, as it exhibits a color change from yellow to red.
Used in Reagent Preparation for Metal Determination:
1-Naphthol-3,6-disulfonic acid is used in the preparation of reagents for the determination of certain metals, enhancing the accuracy and sensitivity of metal analysis.
Used in Analytical Chemistry for Nitrite Detection:
1-Naphthol-3,6-disulfonic acid is used as a reagent for the detection of nitrites in various samples, playing a crucial role in environmental and food safety analysis.
Used in Analytical Chemistry for Nickel and Cobalt Compound Quantification:
1-Naphthol-3,6-disulfonic acid is employed in the quantification of various nickel and cobalt compounds, aiding in the analysis and quality control of these metal compounds in different industries.

InChI:InChI=1/C10H8O7S2/c11-10-5-8(19(15,16)17)4-6-3-7(18(12,13)14)1-2-9(6)10/h1-5,11H,(H,12,13,14)(H,15,16,17)

Upstream product

• 6251-07-6 4-amino-naphthalene-2,7-disulfonic acid 
• 92-41-1 2,7-naphthalenedisulfonic acid 
• 91-20-3 naphthalene 
• 7732-18-5 water 
• 122290-27-1 3,6-disulfo-naphthalene-1-diazonium-betaine 
• 86-66-8 naphthalene-1,3,6-trisulfonic acid 

Relevant academic research and scientific papers

Preparation method of dye intermediate 1-naphthol-3,6-disulfonic acid (RG acid)

The invention relates to the field of organic synthesis, and relates to a preparation method of a dye intermediate 1-naphthol-3,6-disulfonic acid (RG acid). According to the invention, an industrial product 2,7-naphthalene disulfonic acid is adopted as an initial material; and 1-naphthol-3,6-disulfonic acid (RG acid) with a single component and with purity reaching 98% or higher is obtained through three steps of reactions which are nitration, reduction and hydrolysis. During the preparation process provided by the invention, no waste gas and waste solid is emitted. Mother liquor produced through nitration and hydrolysis is subjected to a concentration treatment. Concentrate liquid and evaporated water can be returned to the reaction, and substantially no wastewater is discharged during the entire process. The process has the advantages of simple operation process, mild reaction conditions, and good product quality. The method provided by the invention is a novel route suitable for RG acid industrial production.

Process for aryl-quinone and aryl-naphthoquinone diazide sulfonic acids

A process for the preparation of aryl-diazide-sulfonic acids by a series of sequential in-situ process steps. The process comprises the nitrosation of a hydroxyarylsulfonic acid; conversion of the nitroso-derivative to a sulfamate which is then diazotized to the diazide. Temperature and pH are maintained in predetermined ranges to maintain the reaction products in solution without the formation side-products or the need to isolate intermediates. The process of the invention is particularly useful in the preparation of light-sensitive materials such as naphthoquinonediazide sulfonic acids which are used in the preparation of photoresist compositions. The invention provides a high purity product at a high material efficiency, high equipment utilization, low effluent discharge, and reduced cost.

Aromatic azo sulfonylnitrene compounds

Compounds of the structure SPC1 Wherein R and R1 are the same or different and are selected from the group consisting of hydrogen, halogen, and alkyl from one to four carbon atoms, inclusive, and R2 is a substance which inhibits thrombogenic or clotting activity of a material and is that portion of a substituted aromatic which couples with a diazonium salt.