Tungstic Acid In Mumbai

MOQ200 Kilograms/Kilograms

Density4.5 Gram per millilitre (g/mL)

Molecular FormulaH4[SiW12O40]

FormPowder

Melting Point25AdegC

Molecular Weight2878.2 GSM (gm/2)

StorageRoom Temperature

MOQ50 Kilograms/Kilograms

Supply Ability1 Per Week

Delivery Time1 Week

MOQ10 , Kilograms/Kilograms

Ph LevelHigh

Density5.59 Gram per cubic centimeter(g/cm3)

SolubilityWater

Molecular FormulaH2WO4

StorageRoom Temperature

Purity99%

MOQ50 Kilograms/Kilograms

Product DescriptionSilico Tungstic Acid

MOQ100 Kilograms/Kilograms

GradeMultigrade

TypeIndustrial Lab Chemicals

AppearanceLiquid / Powder

Purity(%)100%

MOQ25 Kilograms/Kilograms

Molecular Weight224 Grams (g)

Physical FormPowder

SolubilityInsoluble Matters in water: Less than 0.20% / Screening Test

CAS No84-87-7

Molecular FormulaC10H7NaO4S

AppearanceWhite Powder

MOQ25 Kilograms/Kilograms

Structural FormulaH3PW12O40

UsageCatalystIn common with the other heteropolyacids phosphotungstic acid is a catalyst and its high acidity and thermal stability make it a catalyst of choice according to some researchers.[13] It is in solution as a homogeneous catalyst, and as a heterogeneous catalyst "supported" on a substrate e.g. alumina, silica. Some acid catalysed reactions include:the homogeneous catalysis of the hydrolysis of propene to give 2-propanolthe homogeneous catalysis of the Prins reactionthe heterogeneous catalysis of the dehydration of 2-propanol to propene and methanol to hydrocarbons.Dyeing and pigmentsPhosphotungstic acid has been used to precipitate different types of dyes as "lakes".[14] Examples are basic dyes and triphenylmethane dyes, e.g. pararosaniline derivatives.HistologyPhosphotungstic acid is used in histology for staining specimens, as a component of phosphotungstic acid haematoxylin, PTAH, and aEURoetrichromeaEUR reagents, and as a negative stain for imaging by a transmission electron microscope.Phosphotungstic acid haematoxylin (PTAH)Mallory described the reagent now generally known as PTAH in 1897.[16] PTAH stains tissues either reddish brown or blue depending on their type. This property of simultaneously staining two different colours is different from other haematoxylin reagents e.g. alum-haematoxylin. The role of phosphotungstic acid and the mechanism of staining is not fully understood. Interestingly the active component of haematoxylin is the oxidised form, haematin, although this rarely acknowledged in the literature which refer to haematoxylin staining. Phosphotungstic acid forms a lake with haematin.[17] The make aEUR"up of the reagent is uncertain, examination of a year old sample showed there to be three coloured components, blue, red and yellow.[18] These were not identified. Some investigations of aEURoemodelaEUR systems, reacting various compounds such as amino acids, purines, pyrimidines and amines with PTAH show that they give rise to different colours.Trichrome reagentsIn these reagents two or three basic dyes are used with phosphotungstic acid, in either a one step or multi-stage procedure. These reagents colour different tissue types different colours. Again the mechanism of staining is not fully understood. Some explanations include the proposal that phosphotungstic acid acts as a mordant to bind the dye to the tissue[20] or that alternatively it binds to tissue blocking it to dye molecules.Negative stainingAdsorption onto tissue or the surface of viruses and its electron density are the bases of phosphotungstic acids action as a negative stain. This electron density arises from the presence of the 12 tungsten atoms which each have an atomic number of 74. The mechanism of the adsorption onto tissue has been proposed as being electrostatic rather than involving hydrogen bonding, as adsorption is not affected by pH.AnalysisThe potassium salt is only slightly soluble, unlike most other phosphotungstate salts, and has been proposed as a method for the gravimetric analysis of potassium.Precipitation of proteinsIn a number of analytical procedures one of the roles of phosphotungstic acid is to precipitate out proteins. It has been termed a "universal" precipitant for polar proteins.[23] Further studies showed that no precipitation occurred with I+--amino groups but did occur with guanidino, Iu-amino and imidazole groups.MedicinalVery little work appears to have been carried out in this area. One example relates to liver necrosis in rats.Composite proton exchange membranesThe heteropoly acids, including phosphotungstic acid, are being investigated as materials in composite proton exchange membranes, such as Nafion. The interest lies in the potential of these composite materials in the manufacture of fuel cells as they have improved operating characteristics

ShapeCrystal

Molecular FormulaH3PW12O40

Solubilitywater soluble

Purity99%min

MOQ25 Kilograms/Kilograms

Purity99%

Physical FormPowder

Molecular FormulaH3PW12O40

Molecular Weight2,880.2 Milligram (mg)

GradeReagent

StorageRoom Temperature

Product DescriptionTUNGSTIC ACID

MOQ1000 Kilograms/Kilograms

Physical FormPowder

Product DescriptionUses :- Production of Tungsten Metal and its derivatives, Fire proofing fabrics and cellulose, Reagent for Uric acid, Alkaloids, Plasma Proteins, Blood sugar, Clinical analysis of blood, Textile (mordant, color resist) plastics, To form metal by reduction, Alloys, Preparation of tungstate for X-ray

MOQ1 Kilograms/Kilograms

CAS No7783-03-1

TypeSchool Lab Chemicals

Purity(%)99%