12 Hydroxy Stearic Acid

MOQ1 Kilograms/Kilograms

StorageRoom Temperature

ColorWhite

CAS No106-14-9

TypePharmaceutical Intermediates

GradeMedicine Grade

UsageIndustrial

MOQ50 Kilograms/Kilograms

StorageRoom Temperature

Molecular Formula‎C18H36O3

Molecular Weight‎300.5 g/mol

Density‎0.9+-0.1 g/cm 3

FormPowder

Purity98%

MOQ100 Kilograms/Kilograms

Purity99%

Shelf Life12 Months

StorageRoom Temperature

ResistanceAcid Resistance

TypeReactive Dye

GradeIndustrial Grade

AppearanceViscous liquid

ColorLight yellow

Purity98%+

Melting Point70-72 °C

Acid Value198-202 mg KOH/g

Hydroxyl Value170-180 mg KOH/g

MOQ1 , Kilograms/Kilograms

Molecular FormulaC21H27N3O5

Molecular Weight401.5 Grams (g)

Melting Point212 to 214 deg F (NTP, 1992)

Appearancewhite crystals or powder

Chemical NameOther, Pyrilamine maleate

MOQ50

Shelf Life24 Months

Packaging Size25 kg, 50 kg bags

ApplicationGreases, Cosmetics, Pharmaceuticals, Lubricants

GradeIndustrial Grade

UsageIndustrial

Refined TypeFractionated

MOQ500 Piece/Pieces

StorageOther, Store in cool, dry, and well-ventilated place

SmellOther, Odorless

Molecular Weight300.48 g/mol

Boiling pointNot readily available; decomposes

Density0.95 Gram per cubic centimeter(g/cm3)

Puritya%0Y=98%

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

Product DescriptionTesting product Testing product Testing product Testing product Testing product Testing product Testing product

MOQ50 Kilograms/Kilograms

SolubilitySoluble in ethanol, ether, and organic solvents

Melting Point70-75 Degree Celsius

StorageRoom Temperature

Purity99%

Molecular FormulaC18H36O3

HS Code29169990

MOQ100 Kilograms/Kilograms

ClassificationOrganic Acids

GradeIndustrial Grade

Purity99%

UsageIndustrial

Solubilityin Water

MOQ50 Kilograms/Kilograms

Physical FormSolid

ApplicationIndustrial

Other Names12 HSA

GradeIndustrial Grade

Chemical NameOther, 12 Hydroxy Stearic Acid

CAS No106-14-9