2-Naphthalinsulfonsäure Chemische Eigenschaften,Einsatz,Produktion Methoden
R-Sätze Betriebsanweisung:
R35:Verursacht schwere Verätzungen.
R34:Verursacht Verätzungen.
R11:Leichtentzündlich.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
S16:Von Zündquellen fernhalten - Nicht rauchen.
Chemische Eigenschaften
Nondeliquescent, white plates.Soluble in water, alcohol, and ether. Combustible.
Verwenden
Naphthalene-2-sulfonic acid is used in making direct dyes, reactive des and employed as dye and agrochemical intermediates.
Definition
ChEBI: Naphthalene-2-sulfonic acid is a naphthalenesulfonic acid in which the sulfo group is linked to position 2 of the naphthalene ring. It has a role as an environmental contaminant and a xenobiotic.
synthetische
Naphthalene-2-sulfonic acid is prepared by sulfonation of naphthalene.
Step: With naphthalene as raw material, 98% sulfuric acid is used as sulfonating agent, and it is obtained by sulfonation at 160-166 ℃. During the sulfonation process, a small amount of α-naphthalenesulfonic acid by-product is generated. By heating, the unstable α-naphthalenesulfonic acid can be hydrolyzed at 140-150 °C to remove the sulfonic acid group, and become naphthalene and sulfuric acid. Naphthalene can be blown out. During the hydrolysis of naphthalene, a small amount of lye should be added to neutralize part of the sulfuric acid. It also acts with naphthalenesulfonic acid to form β-naphthalenesulfonic acid sodium salt crystals, which can be filtered to obtain the finished product of Naphthalene-2-sulfonic acid.
Allgemeine Beschreibung
The fluorescence of 2-naphthalenesulfonic acid (NSA) is effectively quenched by colloidal silver via photoinduced interfacial electron transfer from the excited singlet of NSA to silver. Adsorption behavior of NSA on a conventional macroporous resin Amberlite XAD4 and hypercrosslinked resins NDA101 and NDA100 has been investigated.
läuterung methode
Crystallise the acid from conc HCl. The S-benzylisothiuronium salt has m 192o (from aqueous EtOH). [Berger Acta Chem Scand 8 432 1954, Beilstein 11 H 171, 11 IV 527.]
2-Naphthalinsulfonsäure Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
1-Naphthol
Dinatriummethylenbisnaphthalinsulfonat
[3aR-(3aα,5aβ,9aα,9bβ)]-Dodecahydro-3a,6,6,9a-tetramethylnaphtho[2,1-b]furan
Dinatrium-3,3'-[cyclohexylidenbis[(2-methyl-4,1-phenylen)azo]]bis(4,6-dihydroxynaphthalin-2-sulfonat)
dispersant FDN-90
5-Aminonaphthalin-2-sulfonsure
Natriumnaphthalin-2-sulfonat
Dinatrium-3,3'-[cyclohexylidenbis[(2-methoxy-4,1-phenylen)azo]]bis(4,6-dihydroxynaphthalin-2-sulfonat)
L-Leucin
2-Naphthol
Naphthalin-1-sulfonsure
1,8-Dichlornaphthalin
