Ammoniummolybdat(VI)

Bezeichnung:Ammoniummolybdat(VI)

CAS-Nr13106-76-8

Englisch Name:Ammonium molybdate

CBNumberCB5309999

SummenformelH4MoNO4-

Molgewicht177.99

MOL-Datei13106-76-8.mol

Synonyma

Ammoniummolybdat(VI)

Ammoniummolybdat(VI) physikalisch-chemischer Eigenschaften

Dichte	2.498
storage temp.	Inert atmosphere,Room Temperature
Löslichkeit	ethanol: insoluble(lit.)
Aggregatzustand	Powder
Farbe	White
Wasserlöslichkeit	Soluble in water, acid and alkali, but insoluble in alcohol.
Expositionsgrenzwerte	ACGIH: TWA 0.5 mg/m3 NIOSH: IDLH 1000 mg/m3
CAS Datenbank	13106-76-8(CAS DataBase Reference)
EPA chemische Informationen	Molybdate (MoO42-), ammonium (1:2), (T-4)- (13106-76-8)

Sicherheit

Kennzeichnung gefährlicher	Xi
R-Sätze:	36/37/38
S-Sätze:	26-36
WGK Germany	1
RTECS-Nr.	QA4900000
TSCA	Yes
HS Code	28417010
Toxizität	LD50 orl-rat: 333 mg/kg 28ZLA8 -,214,61

Gefahreninformationscode (GHS)

Ammonium molybdate Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
Chemische Eigenschaften
Ammonium molybdate is a colorless, white or slightly greenish-yellow powder. It is used in chemical analysis for the determination of phosphorus. From a nitric acid solution it precipitates phosphorus in the form of ammonium phosphomolybdate having the formula (NH4)3PO4-12MoO3 after drying at 110 °C(230°F). Some of the phosphomolybdic acids are used as reagents for the alkaloids and in the analysis and separation of the alkali metals.
Verwenden
Ammonium molybdate has been used to prepare phosphomolybdates. (NH4)2MoO4 was used as an analytical reagent for quantitative analysis of phosphates, silicates, arsenates and lead in their aqueous solutions. At saturated concentration, (NH4)2MoO4 was used to perform cryo-negative staining and as a negative stain in biological electron microscopy. Ammonium molybdate was used in study of crystallisation of cell-free-expressed membrane proteins.
Vorbereitung Methode
Pure molybdic oxide (99.95% MoO3) is prepared by sublimation of technical oxide or by calcining ammonium molybdate. Metallic molybdenum powder is prepared commercially by hydrogen reduction of either pure molybdic oxide or ammonium molybdate in a two-step process.
Definition
ChEBI: Ammonium molybdate is an ammonium salt composed of ammonium and molybdate ions in a 2:1 ratio. It has a role as a poison. It contains a molybdate.
Allgemeine Beschreibung
Ammonium molybdate can be prepared by dissolving molybdenum trioxide in ammonia.
Flammability and Explosibility
Not classified
Sicherheitsprofil
Poison by ingestion and intraperitoneal routes. Moderately toxic by other routes. An irritant. See also MOLYBDENUM COMPOUNDS. When heated to decomposition it emits toxic fumes of NH3 and NOx.
mögliche Exposition
It is used as an analytical reagent, in pigments and in the production of molybdenum metal and ceramics.
Versand/Shipping
There are no known UN/DOT restrictions.
läuterung methode
Crystallise the salt from water (2.5mL/g) by partial evaporation in a desiccator. [Sturdivant J Am Chem Soc 59 630 1937, Grüttner & Jauder in Handbook of Preparative Inorganic Chem (Ed. Brauer) Academic Press Vol II p 1711 1965.]
Inkompatibilitäten
Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides; chemically active metals (such as potassium, sodium, magnesium and zinc) may cause a violent reaction.

Ammonium molybdate Upstream-Materialien And Downstream Produkte

Ammoniummolybdat(VI) Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

13106-76-8, Ammonium molybdate Verwandte Suche:

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