12 Hydroxy Stearic Acid In Hyderabad

GradeIndustrial Grade

ApplicationLubricants

Purity99%

UsageWidely Used

StorageCool

AppearanceWhite Flakes

MOQ1-3 Metric Ton/Metric Tons

Molecular FormulaC7H6O3

ApplicationIndustrial

StorageRoom Temperature

Melting Point158.6 deg C

Physical FormPowder

Purity99.9%

MOQ10 Bottle/Bottles

Physical FormPowder

Shapeother Powder

GradeIndustrial Grade

ApplicationIndustrial

Type12 Hydroxy Steraic Acid Powder Other

MOQ10 Box/Boxes

GradeMedicine Grade

Solubility100%

Shelf Life1 Years

StorageRoom Temperature

MOQ50 Bottle/Bottles

Physical FormLiquid

GradeIndustrial Grade

TypeOther Hydrochloric Acid

Inorganic Acid TypesHydrochloric Acid

Purity32%

ApplicationIndustrial

UseLabs

ApplicationLaboratories

MOQ10 Kilograms/Kilograms

ApplicationLubricants

GradeInduatrial

Purity99%

StorageRoom Temperature

CAS No106-14-9

Physical FormLiquid

MOQ1 Kilograms/Kilograms

ColorWhite

StorageRoom Temperature

CAS No106-14-9

TypePharmaceutical Intermediates

GradeMedicine Grade

UsageIndustrial

AppearanceViscous liquid

ColorLight yellow

Purity98%+

Melting Point70-72 °C

Acid Value198-202 mg KOH/g

Hydroxyl Value170-180 mg KOH/g

MOQ20 Ton/Tons

Supply Ability100 Per Week

Delivery Time1 Week

Main Domestic MarketAll India

FeaturesBiodegradable Non-toxic Emulsifier Lubricant Thickener Water-resistant Stable Versatile

MOQ25 Kilograms/Kilograms

PropertiesPhosphotungstic acid can be prepared by the reaction of sodium tungstate Na2WO4.2H2O with phosphoric acid H3PO4 acidified with hydrochloric acid HCl.[2]Phosphotungstic acid solutions decompose as the pH is increased. A step-wise decomposition has been determined and the approximate compositions at various pH values are as follows:[8]pH principal components1.0 [PW12O40]3a^'2.2 [PW12O40]3a^' [P2W21O71]6a^' [PW11O39]7a^'3.5 [PW12O40]3a^' [P2W21O71]6a^' [PW11O39]7a^' [P2W18O62]6a^' [P2W19O67]10a^'5.4 [P2W21O71]6a^' [PW11O39]7a^' [P2W18O62]6a^'7.3 [PW9O34]9a^'8.3 PO43a^' WO42a^'The species [PW11O39]7a^' is a lacunary or defective Keggin ion. The [P2W18O62]6a^' has a Dawson structure. At pH less than 8 the presence of ethanol or acetone stabilises the anion [PW12O40]3a^' reducing decomposition.[8]Tungstophosphoric acid is thermally stable up to 400 AdegC and is more stable than the analogous silicotungstic acid H4SiW12O40.[9]Large quantities of polar molecules such as pyridine are absorbed into the bulk phase and not simply on the surface. Solid state NMR studies of ethanol absorbed in the bulk phase show that both protonated dimers ((C2H5OH)2H+) and monomers (C2H5OH2+) are present.Phosphotungstic acid is less sensitive to reduction than phosphomolybdic acid. Reduction with uric acid or iron(II) sulfate produces a brown coloured compound. the related silicotungstic acid when reduced forms a similar brown compound where one of the four W3 units in the Keggin structure becomes a metal-metal bonded cluster of three edge shared W(IV) octahedra.[10]Phosphotungstic acid is the strongest of heteropolyacids. Its conjugate base is the PW12O403a^' anion.[11] Its acidity in acetic acid has been investigated and shows that the three protons dissociate independently rather than sequentially and the acid sites are of the same strength.[12] One estimate of the acidity is that the solid has an acidity stronger than H0 =a^'13.16[9] which would qualify the compound as a superacid. This acidic strength means that even at low pH the acid is fully dissociated.

CAS No1343-93-7

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

Molecular Weight2880.2 g/mol Kilograms (kg)

Shelf Life5 Years