85-49-4

Basic information

• Product Name: 1,3,7-Naphthalenetrisulfonic acid
• Synonyms: 1,3,7-Naphthalenetrisulfonic acid
• CAS NO: 85-49-4
• Molecular Formula: C₁₀H₈O₉S₃
• Molecular Weight: 368.36
• Mol File: 85-49-4.mol
• Article Data: 4

Chemical Properties

• Appearance: /
• Density: 1.919±0.06 g/cm3(Predicted)
• PKA: -0.89±0.40(Predicted)
• CAS DataBase Reference: 1,3,7-Naphthalenetrisulfonic acid(CAS DataBase Reference)
• NIST Chemistry Reference: 1,3,7-Naphthalenetrisulfonic acid(85-49-4)
• EPA Substance Registry System: 1,3,7-Naphthalenetrisulfonic acid(85-49-4)

Safety Data

• Hazardous Substances Data: 85-49-4(Hazardous Substances Data)

Upstream product

• 91-20-3 naphthalene 
• 120-18-3 naphthalene-2-sulfonate 

Downstream Products

• 578-22-3 2-methyl-5-hydroxybenzoic acid 

Relevant articles and documents

Method adopting clean process for preparing H-acid

The invention discloses a method adopting a clean process for preparing H-acid. The method comprises the following process: step (10), carrying out extraction treatment on denitrated matter to obtain dilute sulphuric acid and an extracted mixture, and carrying out re-extraction on the extracted mixture to obtain a nitro-T-acid solution; step (20), carrying out reduction treatment on the nitro-T-acid solution obtained in the step (10) to obtain an amino-T-acid solution; step (30), respectively carrying out concentration treatment on the amino-T-acid solution obtained in the step (20) and caustic soda liquid to obtain concentrated amino-T-acid solution and caustic soda liquid; step (40), carrying out alkali fusion treatment on the concentrated amino-T-acid solution and caustic soda liquid obtained in the step (30), and performing attenuation treatment to obtain attenuated alkali fusion matter; step (50), carrying out separation and filtration treatment on the attenuated alkali fusion matter obtained in the step (40) to obtain the H-acid. The preparation method disclosed by the invention adopts the clean process for preparing the H-acid, the production efficiency is high, the materials are saved, and the economic cost is reduced.

Method for preparing energy-efficient H-acid

The invention discloses a method for preparing energy-efficient H-acid. The method comprises the steps of conducting sulfonation on liquid naphthalene to obtain a sulfonated substance, conducting nitration on the sulfonated substance to obtain a nitrated substance, conducting denitration on the nitrated substance to obtain a denitrated substance, conducting extraction on the denitrated substance to obtain dilute sulphuric acid and an extraction mixture, conducting reextraction on the extraction mixture to obtain nitro T-acid solution, conducting reduction on the nitro T-acid solution to obtain amino T-acid solution, conducting concentration on the amino T-acid solution and caustic soda liquid to obtain concentrated amino T-acid solution and caustic soda, conducting alkali fusion and dilution on the concentrated amino T-acid solution and caustic soda to obtain a diluted alkali fusion substance, conducting separation and filtration on the diluted alkali fusion substance to obtain H-acid filter cakes, and conducting drying on the H-acid filter cakes to obtain H-acid. By the adoption of the method, continuous production of H-acid can be achieved, and economic cost is low.