2-Naphthalinsulfonsäure

Bezeichnung:2-Naphthalinsulfonsäure

CAS-Nr120-18-3

Englisch Name:Naphthalene-2-sulfonic acid

CBNumberCB8118079

SummenformelC10H8O3S

Molgewicht208.23

MOL-Datei120-18-3.mol

Synonyma

Naphthalin-2-sulfonsure

2-Naphthalinsulfonsäure

2-Naphthalinsulfonsäure physikalisch-chemischer Eigenschaften

Schmelzpunkt	124 °C
Siedepunkt	317.43°C (rough estimate)
Dichte	1.44 g/cm
Dampfdruck	2.33Pa at 20℃
Brechungsindex	1.4998 (estimate)
storage temp.	Inert atmosphere,Room Temperature
Löslichkeit	water: freely soluble(lit.)
pka	0.27±0.10(Predicted)
Aggregatzustand	solid
Farbe	White
Wasserlöslichkeit	Soluble in water.
Sensitive	Hygroscopic
Merck	6377
LogP	-0.944 at 23℃
CAS Datenbank	120-18-3(CAS DataBase Reference)
EPA chemische Informationen	2-Naphthalenesulfonic acid (120-18-3)

Sicherheit

Kennzeichnung gefährlicher	C,F
R-Sätze:	35-34-11
S-Sätze:	26-36/37/39-45-16
RIDADR	UN 2583 8/PG 2
WGK Germany	1
RTECS-Nr.	QK1225000
Hazard Note	Corrosive
TSCA	Yes
HazardClass	8
PackingGroup	III
HS Code	2904100090

Gefahreninformationscode (GHS)

Naphthalene-2-sulfonic acid 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
Starting point in the manufacture of β-naphthol, β-naphtholsulfonic acid, β-naphthylaminesulfonic acid, etc.
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.
Flammability and Explosibility
Non flammable
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.]

Naphthalene-2-sulfonic acid Upstream-Materialien And Downstream Produkte

2-Naphthalinsulfonsäure Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

120-18-3, Naphthalene-2-sulfonic acid Verwandte Suche:

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