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277908

Sigma-Aldrich

Ammonium molybdate

99.98% trace metals basis

Sinonimo/i:

Ammonium orthomolybdate, Diammonium molybdate

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About This Item

Formula condensata:
(NH4)2MoO4
Numero CAS:
13106-76-8
Peso molecolare:
196.01
Numero CE:
236-031-3
Numero MDL:
MFCD00011596
Codice UNSPSC:
12352302
ID PubChem:
24856791
NACRES:
NA.23

Saggio

99.98% trace metals basis

Forma fisica

solid

Impiego in reazioni chimiche

reagent type: catalyst
core: molybdenum

tecniche

electron microscopy: suitable

Impurezze

≤250.0 ppm Trace Metal Analysis

Solubilità

ethanol: insoluble(lit.)

Stringa SMILE

N.N.O[Mo](O)(=O)=O

InChI

1S/Mo.2H3N.2H2O.2O/h;2*1H3;2*1H2;;/q+2;;;;;;/p-2
LZRXBDCICLHKEN-UHFFFAOYSA-L

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Categorie correlate

Descrizione generale

Ammonium molybdate can be prepared by dissolving molybdenum trioxide in ammonia.

Applicazioni

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.2 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.
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.

Pittogrammi

Exclamation mark
GHS07

Avvertenze

Warning

Indicazioni di pericolo

H302

Classi di pericolo

Acute Tox. 4 Oral

Codice della classe di stoccaggio

13 - Non Combustible Solids

Classe di pericolosità dell'acqua (WGK)

WGK 1

Punto d’infiammabilità (°F)

Not applicable

Punto d’infiammabilità (°C)

Not applicable

Dispositivi di protezione individuale

dust mask type N95 (US), Eyeshields, Gloves

Certificati d'analisi (COA)

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Negative staining
Harris JR et al.
Electron Microscopy in Biology (1991)
Handbook of Non-Ferrous Metal Powders: Technologies and Applications null
S De Carlo et al.
Journal of structural biology, 138(3), 216-226 (2002-09-10)
Beam damage is the main resolution-limiting factor when biological particles are observed by cryoelectron microscopy in a thin vitrified solution film. Furthermore, the low contrast of the specimen frequently makes observation difficult and limits the possibility of image processing. Cryo-negative
Effect of the addition of ammonium molybdate on metakaolin-based geopolymer formation: Shrinkage and crystallization
Vidal L, et al.
Powder Technology, 275, 211-219 (2015)
M Adrian et al.
Micron (Oxford, England : 1993), 29(2-3), 145-160 (1998-07-31)
A procedure is presented for the preparation of thin layers of vitrified biological suspensions in the presence of ammonium molybdate, which we term cryo-negative staining. The direct blotting of sample plus stain solution on holey carbon supports produces thin aqueous
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