Nitrosylschwefelsure

Bezeichnung:Nitrosylschwefelsure

CAS-Nr7782-78-7

Englisch Name:Nitrosylsulfuric acid

CBNumberCB3695582

SummenformelHNO5S

Molgewicht127.07

MOL-Datei7782-78-7.mol

Synonyma

Nitrosylschwefelsure

Nitrosylschwefelsure physikalisch-chemischer Eigenschaften

Schmelzpunkt	-10 °C
Siedepunkt	333℃ at 101.33kPa
Dichte	1.612 g/mL at 25 °C
Dampfdruck	2.6-30Pa at 20-50℃
storage temp.	Refrigerator (+4°C)
Löslichkeit	reacts with H2O; soluble in H2SO4
pka	-7.51±0.18(Predicted)
Aggregatzustand	Viscous Liquid
Farbe	Clear to milky yellow to greenish
Wasserlöslichkeit	decomposes
Merck	13,6682
InChIKey	VQTGUFBGYOIUFS-UHFFFAOYSA-N
CAS Datenbank	7782-78-7(CAS DataBase Reference)
EPA chemische Informationen	Sulfuric acid, monoanhydride with nitrous acid (7782-78-7)

Sicherheit

Kennzeichnung gefährlicher	O,T
R-Sätze:	8-14-23/24/25-35-34
S-Sätze:	17-26-36/37/39-45-27
RIDADR	UN 3264 8/PG 2
WGK Germany	3
HazardClass	8
PackingGroup	II
HS Code	28111980

Gefahreninformationscode (GHS)

Nitrosylsulfuric acid Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R8:Feuergefahr bei Berührung mit brennbaren Stoffen.
R14:Reagiert heftig mit Wasser.
R23/24/25:Giftig beim Einatmen, Verschlucken und Berührung mit der Haut.
R35:Verursacht schwere Verätzungen.
R34:Verursacht Verätzungen.
S-Sätze Betriebsanweisung:
S17:Von brennbaren Stoffen fernhalten.
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).
S27:Beschmutzte, getränkte Kleidung sofort ausziehen.
Chemische Eigenschaften
Nitrosylsulfuric acid, HNO₅S, is a straw-colored, oily liquid furnished as a 40% solution in 87% sulfuric acid,and stable at room temperature. It is used as a diazotizing agent for dyes,chemical intermediate, drugs and pharmaceuticals.
Physikalische Eigenschaften
Nitrosylsulfuric acid is produced as an intermediate in the manufacture of sulfuric acid using the lead chamber process by the reaction of sulfur dioxide, nitrogen dioxide, oxygen, and water.
Nitrosylsulfuric acid also is made from absorption of nitrogen oxides (NO_x) in oleum (fuming sulfuric acid):
N₂O₃ + 2H₂SO₄ → 2ONSO₄ + H₂O
or by the reaction of nitrosyl chloride with concentrated sulfuric acid:
ClNO + H₂SO₄ → ONSO₄ + HCl
Another method of preparation involves the reaction of nitrosyl bromide with silver bisulfate:
AgHSO₄ + BrNO → ONHSO₄ + AgBr
In making disperse azo dyes, nitrosylsulfuric acid is produced by the addition of sodium nitrite, NaNO₂, to concentrated sulfuric acid (1g NaNO₂ per 13 g H₂SO₄).
Verwenden
Nitrosylsulfuric acid is used for diazotisation, nitrosation, oxidation and oximation reactions. Product Data Sheet
Verwenden
Nitrosylsulfuric acid (40?wt. % in sulfuric acid) is a reagent used for the preparation of new heterocyclic disperse azo dyes.
Verwenden
For bleaching cereal milling products.
Allgemeine Beschreibung
Shipped in solution with sulfuric acid (solutions are usually 40% Nitrosylsulfuric acid and 54% sulfuric acid (Hawley)). Solution is a straw-colored oily liquid with a sharp odor. When pure, a crystalline solid decomposing at 73°C. Very irritating to skin and eyes. Used to make dyes and other chemicals.
Reaktivität anzeigen
Nitrosylsulfuric acid is an oxidizing agent. Neutralizes chemical bases in exothermic reactions. An attempt to diazotize dinitroaniline using Nitrosylsulfuric acid resulted in an explosion with loss of life. The event was blamed on the high concentration of the reactants dinitroaniline hydrochloride and Nitrosylsulfuric acid [MCA Case History 1763. 1971].
Hazard
Strong irritant to skin and mucous membranes.
Health Hazard
TOXIC; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance may cause severe injury, burns or death. Reaction with water or moist air will release toxic, corrosive or flammable gases. Reaction with water may generate much heat that will increase the concentration of fumes in the air. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.
Brandgefahr
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Vapors may accumulate in confined areas (basement, tanks, hopper/tank cars etc.). Substance will react with water (some violently), releasing corrosive and/or toxic gases and runoff. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water.
Sicherheitsprofil
A poison. A corrosive irritant to skin, eyes, and mucous membranes. Explosive reaction above 50°C with 2-chloro-4,6-dinitroaniline and 4- chloro-2,6-d1nitroalne. Potentially explosive reaction with dmitroaniline. When heated to decomposition it emits toxic fumes of SOx and NOx. See also SULFATES and NITRATES.

Nitrosylsulfuric acid Upstream-Materialien And Downstream Produkte

Nitrosylschwefelsure Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

7782-78-7, Nitrosylsulfuric acid Verwandte Suche:

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