578-85-8

Basic information

• Product Name: 1-Naphthol-3,6-disulfonic acid
• Synonyms: 1-NAPHTHOL-3,6-DISULFONIC ACID 98%;1-Naphthol-3,6-disulfonic acid;1-Hydroxy-3,6-naphthalenedisulfonic acid;1-Hydroxynaphthalene-3,6-bissulfonic acid;1-Hydroxynaphthalene-3,6-disulfonic acid;1-Naphthol-3,6-disul;4-hydroxynaphthalene-2,7-disulphonic acid;4-Hydroxy-2,7-Naphthalenedisulfonic Acid
• CAS NO: 578-85-8
• Molecular Formula: C₁₀H₈O₇S₂
• Molecular Weight: 304.3
• EINECS: 209-432-6
• Product Categories: Organic acids;Intermediates of Dyes and Pigments
• Mol File: 578-85-8.mol
• Article Data: 3

Chemical Properties

• Appearance: /
• Density: 1.816 g/cm³
• PKA: -0.14±0.40(Predicted)
• CAS DataBase Reference: 1-Naphthol-3,6-disulfonic acid(CAS DataBase Reference)
• NIST Chemistry Reference: 1-Naphthol-3,6-disulfonic acid(578-85-8)
• EPA Substance Registry System: 1-Naphthol-3,6-disulfonic acid(578-85-8)

Safety Data

• Hazardous Substances Data: 578-85-8(Hazardous Substances Data)

Usage

General Description

1-Naphthol-3,6-disulfonic acid is a chemical compound that is commonly used in the production of dyes, pigments, and fluorescent markers. It is a white to light yellow crystalline powder that is soluble in water. 1-Naphthol-3,6-disulfonic acid is often utilized as a pH indicator in chemical analysis, as it undergoes a color change from yellow to red in the presence of strong acids. Additionally, it is used in the preparation of reagents for the determination of certain metals. 1-Naphthol-3,6-disulfonic acid is also employed in analytical chemistry as a reagent for the detection of nitrites and the quantification of various nickel and cobalt compounds. Overall, this chemical compound plays a significant role in various industrial and analytical applications.

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

• 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 
• 6251-07-6 4-amino-naphthalene-2,7-disulfonic acid 

Relevant articles and documents

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.

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.