117-86-2

Usage

Uses

Used in Dye and Pigment Production:
3-Nitronaphthalene-1,5-disulphonic acid is used as a dye intermediate for the production of dyes and pigments. Its ability to react with various chemicals allows for the creation of a wide range of colors, making it a valuable component in this industry.
Used in Pharmaceutical Synthesis:
In the pharmaceutical industry, 3-nitronaphthalene-1,5-disulphonic acid serves as a key intermediate in the synthesis of various organic compounds. Its unique chemical structure contributes to the development of new drugs and medicinal agents.
Used in Agricultural Chemical Manufacturing:
3-Nitronaphthalene-1,5-disulphonic acid is utilized in the production of chemicals for the agricultural industry. Its properties make it suitable for use in the development of agrochemicals, such as pesticides and fertilizers, to enhance crop yield and protect plants from diseases and pests.
Used in Textile Industry:
In the textile industry, 3-nitronaphthalene-1,5-disulphonic acid is employed in the manufacturing of chemicals used for dyeing and finishing processes. Its role in producing a diverse palette of colors and improving the quality of textile materials is essential for meeting the demands of the fashion and textile markets.

InChI:InChI=1/C10H7NO8S2/c12-11(13)6-4-8-7(10(5-6)21(17,18)19)2-1-3-9(8)20(14,15)16/h1-5H,(H,14,15,16)(H,17,18,19)

Upstream product

• 81-04-9 naphthalene-1,5-disulfonate 
• 581-89-5 2-nitronaphthalene 
• 91-20-3 naphthalene 

Downstream Products

• 131-27-1 3-amino-1,5-naphthalenedisulfonic acid 

Relevant academic research and scientific papers

Preparation method of clean product amino C acid

The invention relates to a preparation method of clean product amino C acid. The preparation method comprises the steps that refined naphthalene is doubly sulfonated, then 1,5-naphthalene disulfonic acid is obtained, after nitration, 3-nitronaphthalene-1,5-disulfonic acid is generated, then neutralizing is conducted through liquid caustic soda, and the amino C acid is obtained through hydrazine hydrate reduction. Compared with an original production technology, no waste residue is generated in the whole technological process, the purpose of emission reduction is achieved, and the technology issimpler, more convenient and safer and has the actual effect.

The positional reactivity order in the sulfur trioxide sulfonation of benzene and naphtalene derivatives containing an electron-withdrawing substituent

The reaction of sulfur trioxide with derivatives of benzene and naphthalene containing an electron-withdrawing substituent, viz.-SO3H, -SO2Ph, -NO2, -CHO, -COPh, -CO2H, and -CO2Me, in dichloromethane as solvent at ca. 22 deg C has been studied by analysis of the resulting mixtures of the sulfo derivatives with 1H-NMR.The initial sulfonation of the benzene derivatives yields the corresponding 3-sulfonic acid (3-S) and subsequently, with the exception of nitrobenzene and methyl benzoate, small amounts of 3,5-S2.Benzenesulfonic acid in addition undergoes sulfonylation giving 3,3'-di- and 3,5,3'-trisulfodiphenyl sulfone.Monosulfonation of naphtalene-1-S yields the 1,5-S2, 1,6-S2 and 1,7-S2 derivatives in a ratio of 71:20:9.On using a large excess of SO3, the eventual products are 1,3,5-S3, 1,3,6-S3 and 1,3,5,7-S4.Monosulfonation of naphthalene yields 5-S, 6-S, 7-S and 8-S in a 55:9:6:30 ratio, that of 1-benzoylnaphthalene 5-S, 6-S and 7-S in a ratio of 83:11:6, and 1-nitronaphtalene only the 5-S.The absence of peri sulfonation with 1-sulfo-, 1-benzoyl- and 1-nitronaphthalene is due to prohibitive steric hidrance. 1-Naphthoic acid and its methyl ester upon SO3 sulfonation and aqueous work-up both yield 5- and 8-sulfonaphthoic acid in a ratio of 65:35 and 77:21, respectively.The initially formed peri-substituted product is the intramolecular anhydride of 8-sulfo-1-naphthoic acid (5).All the 2-substituted naphthalenes yield 5-S and 8-S upon SO3 sulfonation of which the former sulfo isomer is far in excess.The positional reactivity orders for the SO3 sulfonation of the monosubstituted naphthalene derivatives are discussed in terms of the difference in reactivity of the α- and β-positions, and the steric and electronic effects of the deactivating substituent.

Process for the preparation of aminoarylsulphonic acids

In the process according to the invention for the preparation of aminoarylsulphonic acids by catalytic hydrogenation of nitroarylsulphonic acids, a substantial increase in the space-time yield in combination with reduced consumption of the catalyst is achieved by dispersing the hydrogen more finely and by limiting according to the invention the concentration of the nitroarylsulphonic acids to be hydrogenated.

Process for the production of nitro derivatives of aromatic compounds

Nitroderivates of aromatic compounds which are difficult to nitrate, can readily be obtained by nitration providing that the aromatic compound is treated with nitric acid or another nitrating agent in the presence of aliphatic or cycloaliphatic hydrocarbons monosubstituted or polysubstituted by halogen, the nitro group or an alkyl sulphonyl group, and the nitro derivative formed subsequently isolated.