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79690

Sigma-Aldrich

Phosphotungstic acid hydrate

for microscopy

Synonym(s):

Tungstophosphoric acid

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About This Item

Linear Formula:
H3[P(W3O10)4] · xH2O
CAS Number:
12501-23-4
Molecular Weight:
2880.05 (anhydrous basis)
MDL number:
MFCD00149915
UNSPSC Code:
12171500
PubChem Substance ID:
329768557
NACRES:
MA.02

grade

for microscopy

Quality Level

200

form

powder or crystals

impurities

≤0.002% total nitrogen (N)

loss

≤15% loss on drying

pH

2 (20 °C)

mp

~95 °C (lit.)

solubility

water: 0.5 g/10 mL, clear, colorless

anion traces

chloride (Cl-): ≤50 mg/kg
sulfate (SO42-): ≤100 mg/kg

cation traces

Ca: ≤20 mg/kg
Cu: ≤5 mg/kg
Fe: ≤20 mg/kg
K: ≤50 mg/kg
Na: ≤50 mg/kg
Pb: ≤20 mg/kg
Zn: ≤5 mg/kg

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

SMILES string

O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.OP(O)(O)=O

InChI

1S/H3O4P.H2O.36O.12W/c1-5(2,3)4;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;/h(H3,1,2,3,4);1H2;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

InChI key

AVFBYUADVDVJQL-UHFFFAOYSA-N

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General description

Phosphotungstic acid hydrate is a heteropolyacid.It is a reagent suitable to detect alkaloids and nitrogenous bases. It is suitable for manufacturing organic pigments, and additives in the plating industry. It is known to impart water resistance to plastics, adhesives, and cement. It also is suitable as a catalyst for organic reactions.

Application

Phosphotungstic acid hydrate may be used as a staining agent for the transmission electron microscope (TEM) imaging of cetyltrimethylammonium bromide (CTAB) coated gold nanorods.It may be used in the preparation of:
  1. Phosphotungstic acid doped ormosil hybrid networks
  2. Niobia supported phosphotungstic acid (PTA) catalysts
  3. Titanium dioxide (TiO2) nanoparticles /phosphotungstic acid (HPW) films.

Other Notes

Review of the folin phenol method for the quantitative determination of proteins

Signal Word

Danger

Hazard Statements

H302,H314,H411

Hazard Classifications

Acute Tox. 4 Oral - Aquatic Chronic 2 - Eye Dam. 1 - Skin Corr. 1C

Storage Class Code

8B - Non-combustible corrosive hazardous materials

WGK

WGK 2

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

ISHL Indicated Name

Substances Subject to be Indicated Names

ISHL Notified Names

Substances Subject to be Notified Names

JAN Code

79690-500G:4548173962597
79690-25G:4548173962580
79690-100G:4548173962573
79690-BULK:
79690-VAR:

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Certificates of Analysis (COA)

Lot/Batch Number
BCCG2758
BCCF2973
BCCD9062
BCCB2065
BCBZ9224

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