Production Method 1

135-19-3

118-32-1

148-75-4

93-01-6

Reaction Conditions

1.1 Reagents: Sulfuric acid ;  0.5 h, 45 °C
1.2 Reagents: Fuming sulfuric acid ;  2 h, 55 - 65 °C; 4 h, 60 - 65 °C; 0.5 h, 60 °C → 80 °C; 6 h, 80 °C

Reference

Preparation of 2-amino-3,6,8-naphthalene trisulfonic acid

, China, , ,

2-Naphthol-6,8-disulfonic acid Raw materials

• naphthalen-2-ol

2-Naphthol-6,8-disulfonic acid Preparation Products

• 2-Naphthol-6,8-disulfonic acid (118-32-1)
• 3-hydroxynaphthalene-2,7-disulphonic acid (148-75-4)
• 6-Hydroxynaphthalene-2-sulfonic acid (93-01-6)

• 1. Excimer–monomer switch: a reaction-based approach for selective detection of fluoride?
  Qiao Song,Angela Bamesberger,Lingyun Yang,Haley Houtwed,Haishi Cao Analyst, 2014,139, 3588-3592
• 2. Exchanged ligands on the surface of a giant cluster: [(MoO3)176(H2O)63(CH3OH)17Hn](32 – n)–
  Chem. Commun., 1998, 1501-1502
• 3. Evidence of rutile-to-anatase photo-induced electron transfer in mixed-phase TiO2 by solid-state NMR spectroscopy?
  Weili Dai,Guangjun Wu,Michael Hunger Chem. Commun., 2015,51, 13779-13782
• 4. Dissociation of aryl sulfonyl phthalimide radical anions: relevance to the biological activity of arylsulfonyl amides?
  Abdelaziz Houmam,Emad M. Hamed Chem. Commun., 2012,48, 11328-11330
• 5. Evolution of calcium phosphate precipitation in hanging drop vapor diffusion by in situRaman microspectroscopy
  Gloria Belén Ramírez-Rodríguez,José Manuel Delgado-López,Jaime Gómez-Morales CrystEngComm, 2013,15, 2206-2212

• Solvents and Organic Chemicals Organic Compounds Benzenoids Naphthalenes Naphthalene sulfonic acids and derivatives Naphthalene sulfonates

Comprehensive Overview of 2-Naphthol-6,8-disulfonic acid (CAS No. 118-32-1): Properties, Applications, and Industry Trends

2-Naphthol-6,8-disulfonic acid (CAS No. 118-32-1) is a high-value sulfonated aromatic compound widely utilized in the synthesis of dyes, pigments, and specialty chemicals. With its unique molecular structure featuring two sulfonic acid groups at the 6 and 8 positions of the naphthalene ring, this compound exhibits exceptional water solubility and reactivity, making it indispensable in industrial applications. The growing demand for eco-friendly dyes and high-performance intermediates has further amplified its relevance in modern chemical research.

Recent trends in sustainable chemistry have spurred interest in optimizing the synthesis of 2-Naphthol-6,8-disulfonic acid to reduce energy consumption and waste generation. Researchers are exploring catalytic sulfonation methods to enhance yield and purity while minimizing environmental impact. Additionally, its role in textile dyeing and photographic chemicals aligns with the increasing focus on green manufacturing practices, addressing concerns raised by environmentally conscious consumers.

The compound’s versatility extends to pharmaceutical intermediates, where its sulfonic acid groups facilitate the development of water-soluble APIs (Active Pharmaceutical Ingredients). This property is critical for formulations requiring improved bioavailability, a topic frequently searched in drug delivery optimization discussions. Furthermore, its application in analytical reagents for metal ion detection highlights its importance in environmental monitoring, a sector gaining traction due to stricter regulatory standards.

From a technical perspective, 2-Naphthol-6,8-disulfonic acid demonstrates stability under acidic conditions but requires careful handling to avoid decomposition at elevated temperatures. Its UV-absorbing properties have also attracted attention in sunscreen formulations, coinciding with rising consumer interest in broad-spectrum UV filters. Industry reports suggest that advancements in naphthalene derivatives like this compound could revolutionize functional material design, particularly in electronic coatings and sensors.

Market analysts note that the Asia-Pacific region dominates production due to robust dye manufacturing infrastructure, with innovations focusing on wastewater treatment solutions for sulfonated byproducts. As circular economy principles gain momentum, recovery and reuse strategies for 118-32-1 byproducts are being actively investigated, reflecting broader shifts toward resource efficiency in chemical industries.

In summary, 2-Naphthol-6,8-disulfonic acid (CAS No. 118-32-1) remains a cornerstone of specialty chemical innovation, bridging gaps between traditional applications and emerging technologies. Its multifaceted utility ensures continued relevance in sectors ranging from textiles to advanced materials, while ongoing research addresses sustainability challenges—a key priority for stakeholders across the value chain.

• 84-87-7(4-hydroxynaphthalene-1-sulfonic acid)
• 30252-40-5(2-Naphthol-8-sulfonic Acid Potassum Salt)
• 117-59-9(1-Naphthol-5-sulfonic Acid)
• 27928-00-3(1,3,6-Pyrenetrisulfonicacid, 8-hydroxy-)
• 25059-15-8(1-Naphthalenesulfonicacid, 6-hydroxy-, sodium salt (1:1))
• 132-57-0(1-Naphthalenesulfonicacid, 7-hydroxy-)
• 842-18-2(7-Hydroxy-1,3-naphthalenedisulfonic Acid Dipotassium Salt)
• 3316-02-7(ζ-Stat)
• 13846-08-7(2-Naphthol-6,8-disulfonic Acid Potassium Salt)
• 6357-85-3(3-hydroxynaphthalene-1-sulfonic Acid)