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Arsenic acid

Arsenic acid Struktur
1327-52-2
CAS-Nr.
1327-52-2
Englisch Name:
Arsenic acid
Synonyma:
ARSENIC ACID
CBNumber:
CB62130237
Summenformel:
AsH3O4
Molgewicht:
141.94
MOL-Datei:
1327-52-2.mol

Arsenic acid Eigenschaften

PH
3.08(1 mM solution);2.31(10 mM solution);1.7(100 mM solution)

Sicherheit

RIDADR  UN 1553 6.1/PG I (ARSENIC ACID, LIQUID)
RIDADR  UN 1554 6.1/PG II (ARSENIC ACID, SOLID)
HazardClass  6.1
PackingGroup  I
PackingGroup  II
Toxizit?t chicken,LDLo,oral,125mg/kg (125mg/kg),"Ueber die Wirkung Verschiedener Gifte Auf Vogel, Dissertation," Forchheimer, L., Pharmakologischen Institut der Universitat Wurzburg, Fed. Rep. Ger., 1931Vol. -, Pg. -, 1931.

Arsenic acid Chemische Eigenschaften,Einsatz,Produktion Methoden

Beschreibung

Arsenic acid has the molecular formula H3AsO4. More descriptively written as AsO(OH)3, this colorless acid is the arsenic analog of phosphoric acid. Arsenate and phosphate salts behave very similarly. Arsenic acid as such has not been isolated, but only found in solution where it is largely ionized. Its hemihydrate form (H3AsO4·1/2H2O) does form stable crystals. Crystalline samples dehydrate with condensation at 100 °C.
Arsenic acid is a tetrahedral species of idealized symmetry C3v with As—O bonds lengths ranging from 1.66 to 1.71 . Being a triprotic acid, its acidity is described by three equilibria:
H3AsO4 H2AsO4- + H+ (pk1 =10-2.19)
H2AsO4 5HasO4 2- + H+ (pk2 = 10-6.94)
HasO4 2 5AsO4 3- + H+ (pk3 = 10-11.5)

synthetische

Arsenic acid is prepared by treating arsenic trioxide with concentrated nitric acid or by combination of arsenic acid with water. The latter reaction is very slow. It is also formed when metaarsenic or pyroarsenic acid is treated with cold water.

Arsenic acid Upstream-Materialien And Downstream Produkte

Upstream-Materialien

Downstream Produkte


Arsenic acid Anbieter Lieferant Produzent Hersteller Vertrieb H?ndler.

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  • ARSENIC ACID
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