Phosphotungstic Acid In Vapi

MOQ25 Kilograms/Kilograms

FormPowder

Melting Point89 i?1/2C

Molecular FormulaH3PW12O40

Density960 Kilogram per cubic meter (kg/m3)

GradeOther Bio-Tech Grade

UsageFor Laboratory and Industrial

MOQ10

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

StorageRoom Temperature

CAS No1343-93-7

Physical FormPowder

ShapeCrystal

GradeExtra Pure

MOQ20 Kilograms/Kilograms

Molecular FormulaH3PO4

ClassificationInorganic Acids

Inorganic Acid TypesPhosphoric Acid

Purity99%

Appearanceliquid

CAS No7664-38-2

MOQ25 Kilograms/Kilograms

Physical FormPowder

Purity99%

GradeReagent

Molecular Weight2880.2 Milligram (mg)

Molecular FormulaH3PW12O40

StorageRoom Temperature

Purity99.9%

FormPowder

PackagingWide-mouth jar

CAS Number12027-38-2

Molecular Weight2879.84 g/mol

SolubilitySoluble in water

Purity99%

AppearanceBrown

PackagingAmber glass bottle

SolubilityWater soluble

Molecular weight2880 g/mol

CAS number12027-38-4

GradeReagent Grade

ApplicationAnalytical Chemistry

Purity99.9%

UsageCatalyst

StorageCool & Dry Place

AppearanceYellowish

MOQ25 Kilograms/Kilograms

Properties25

GradeIndustrial Grade

ApplicationDyeing agent

PurityHigh Purity

UsageTextile industry

StorageCool & Dry place

AppearanceWhite or Cream

GradeReagent grade

ApplicationAnalytical chemistry

Purity99% min

UsageCatalyst

StorageCool

AppearanceYellow powder

Purity99%

FormPowder

SolubilityOrganic solvents

StorageDry cool

CAS NumberVariable

Packaging1g 5g

Purity99.9%

Concentration1M

PH2-3

Packaging1L bottle

StorageCool dark place

Expiry2 years

Purity99.9%

PH2.5-3.5

Concentration0.1M

Packaging500ml bottle

StorageCool dry place

Shelf Life12 months

Product TypeChemical Acid

Specific Gravity1.15-1.18

PH1.0

Boiling Point108C

Melting Point<-36C

Vapor Density1.97

MOQ500 Kilograms/Kilograms

TasteAcidic

Refractive Rate1.433 at 20C

Molecular FormulaH3PO4

HS Code28092010

Structural FormulaO=P(OH)3

Boiling point158C