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Sigma-Aldrich

Ammonium molybdate

99.98% trace metals basis

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Synonym(s):
Ammonium orthomolybdate, Diammonium molybdate
Linear Formula:
(NH4)2MoO4
CAS Number:
13106-76-8
Molecular Weight:
196.01
EC Number:
236-031-3
MDL number:
MFCD00011596
PubChem Substance ID:
24856791
NACRES:
NA.23

Quality Level

100

Assay

99.98% trace metals basis

form

solid

reaction suitability

reagent type: catalyst
core: molybdenum

technique(s)

electron microscopy: suitable

impurities

≤250.0 ppm Trace Metal Analysis

solubility

ethanol: insoluble(lit.)

SMILES string

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

InChI

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

InChI key

LZRXBDCICLHKEN-UHFFFAOYSA-L

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General description

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

Application

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.

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H302

Precautionary Statements

P264 - P270 - P301 + P312 - P501

Hazard Classifications

Acute Tox. 4 Oral

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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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
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)
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
Leandro Silva Costa et al.
Marine drugs, 9(6), 952-966 (2011-07-13)
Fucan is a term used to denominate a type of polysaccharide which contains substantial percentages of l-fucose and sulfate ester groups. We obtained five heterofucans from Sargassum filipendula by proteolytic digestion followed by sequential acetone precipitation. These heterofucans are composed
Principles of micro Sequential Injection Analysis in the Lab-on-Valve format and its Introduction into a Teaching Laboratory
Decuir MS, et al.
Journal of Flow Injection Analysis, 24(2), 103-103 (2007)
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