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Carboxylate Esters
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Chemical properties
Methylcellulose occurs as a white, fibrous powder or granules. It is practically odorless and tasteless. It should be labeled to indicate its viscosity type (viscosity of a 1 in 50 solution).
Chemical properties
Methyl cellulose is a water soluble, gel-like substance with no odor and no taste.
The Uses of Methyl cellulose
Methyl cellulose is used as a thickener and an emulsifier in various food and cosmetic products; as a gel in advanced cookery and as a lubricant. It is also involved in the treatment of constipation. It acts as a buffer additive in capillary electrophoresis to control electoosmotic flow for improved separations. In paper and textile industries, it is used as a sizing, thereby protecting the fibers from water or oil.
The Uses of Methyl cellulose
Thickener for aqueous and non-aqueous systems, clear films with grease resistance, binders, lubricants, steric stabilizer and water retention aid.
The Uses of Methyl cellulose
As a substitute for water-soluble gums; to render paper greaseproof, in adhesives, as thickening agent in cosmetics, as protective colloid in emulsions, as binder and stabilizer in foods. As fat replacer in the formulation of dietetic foods. Pharmaceutic aid (suspending agent).
The Uses of Methyl cellulose
Methylcellulose is a gum composed of cellulose in which the meth- oxyl groups replace the hydroxyl groups. it is soluble in cold water but insoluble in hot water. solutions increase in viscosity upon heating, gel at 50–55°c, and liquefy upon cooling. it is used in baked goods for moisture retention, and in fruit pie fillings for the reduction of water absorption into the pie crust during baking. it is also used in breaded shrimp where it functions to form an oil barrier film.
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Methyl Cellulose
| Melting point: | 290-305 °C |
| Density | 1.01 g/cm3(Temp: 70 °C) |
| FEMA | 2696 | METHYL CELLULOSE |
| storage temp. | Room Temperature |
| solubility | Practically insoluble in hot water, in acetone, in anhydrous ethanol and in toluene. It dissolves in cold water giving a colloidal solution. |
| form | powder |
| color | White, yellow-white or grayish-white |
| Odor | odorless |
| Water Solubility | SOLUBLE IN COLD WATER |
| Merck | 14,6040 |
| Dielectric constant | 3.0（Ambient） |
| Stability: | Stable. Incompatible with strong oxidizing agents, bleach, perchloric acid, nitric acid, perchlorates, alkali nitrates, alkali nitrites, calcium oxide. |
| EPA Substance Registry System | Methylcellulose (9004-67-5) |
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N-Bromosuccinimide (NBS) is a reagent typically used in radical substitution and electrophilic addition reactions. In pure form it exists as a white solid but over time it will decompose to give off bromine which will give it a slight yellow/brown color.
The Uses of N-Bromosuccinimide
N-Bromosuccinimide is a brominated succinimide used as a chemical reagent in radical substitution and electrophilic addition reactions in organic synthesis.
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4-Bromobenzaldehyde is widely utilized as an intermediate for the preparation of agrochemicals, pharmaceuticals and other organic compounds. It is used as a precursor and reacts with sulfamethoxazole to prepare Schiff?s base, 4-[(4-Bromo-benzylidene)-amino]-N-(5-methyl-isoxazol-3-yl)-benzene sulfonamide, which can be used for the photo stability of polyvinyl chloride (PVC). It plays an important role in palladium-catalyzed mono- and bis-arylation of 3, 4-(ethylenedioxy)thiophenes. It is employed in a cross-coupling study with potassium vinyltrifluoroborate.
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Entacapone (E558500) impurity.
The Uses of 3-Nitro-4, 5-dihydroxybenzaldehyde3, 4-Dihydroxy-5-nitrobenzaldehyde (Entacapone EP Impurity C) is an Entacapone (E558500) impurity.
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1, 1'-Carbonyldiimidazole (CDI) is a highly efficient coupling reagent commonly used in peptide synthesis and organic chemistry. CDI can be used to activate carboxylic acids. These activated carboxylic acids react with nucleophiles to form products such as amides, esters, ureas, and carbamates. CDI reactions do not usually require a base because the released imidazole anion acts as the base. CDI is humidity sensitive and readily reacts with H2O to form CO2.
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Bis(chloromethyl)ketone is a crystalline solid.Molecular weight=127.02; Freezing/Melting point=45;Boiling point=173. Hazard Identification (based onNFPA-704 M Rating System): Health 3, Flammability 1, Reactivity 0. Soluble in water.
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m-CPBA is a peroxycarboxylic acid that is commonly used as an oxidizing agent. It is usually available in
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4-Bromo-2-methoxybenzaldehyde is used in the building block, synthesis of a nonacid degradable linker for solid-phase synthesis.
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Bis(pinacolato)diboron is typically used for making pinacol boronate esters. These boronates are generally used subsequently in palladium catalyzed Suzuki couplings. They are also sometimes used in other reactions such as oxidations to form phenols. Pinacol boronate esters are generally easier to handle than boronic acids.
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N-Boc-D-aspartic acid is an N-Boc-protected form of D-Aspartic acid (A790020). D-Aspartic acid is the unnatural isomer of L-Aspartic acid (A790024). D-Aspartic acid naturally occurs in human ovarian follicular fluid, and is thought to be linked to oocyte quality. It is also found in the white matter of human brains, more specifically in myelin proteins.
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Ethyl carbamate occurs as colourless or white columnar crystals or granular powder. It is very soluble in water. With heat, ethyl carbamate undergoes decomposition and emits toxic fumes of carbon monoxide, carbon dioxide, and nitrogen oxides. Ethyl carbamate is used as an intermediate in the synthesis of a number of chemical products, for example, pharmaceuticals, in biochemical research and medicine, and as a solubiliser and co-solvent for pesticides and fumigants. Prior to World War II, ethyl carbamate saw relatively heavy use in the treatment of multiple myeloma before it was found to be toxic, carcinogenic, and largely ineffective.
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Ethyltriphenylphosphonium iodide is involved in synthesis of diarylmethine derivatives, phosphonium salts, and bismuth(III) polynuclear halide complexes, asymmetric hydrogenation.Ethyltriphenylphosphonium iodide is used as a Wittig reagent and phase transfer catalyst in organic synthesis. It can also be used in asymmetric hydrogenation and to make Bismuth(III) polynuclear complexes.
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Methyl p-toluenesulfonate is used as a methylating agent in organic synthesis. It acts as a catalyst for alkyd resins. It is also employed in selective 1-substitution reaction of tetrazole. Further, it is used in the preparation of dyes.Methyl p-Toluenesulfonate can be used in the manufacture of dyes and organic synthesis, and also is the raw materials of methylation.
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LD 50 (Rat): > 5 g/kg .Hypromellose is considered low toxicity to non-toxic .Adverse events may include blurred vision and contact dermatitis . Hypersensitivity and intolerance reactions may occur (for example, eye burning, pain, increased lacrimation, a sensation of foreign body, conjunctival hyperemia, eyelid swelling, pruritus). The stickiness sensation of the eyelids, the decreased sense of smell, photosensitivity .
Chemical propertiesHypromellose is an odorless and tasteless, white or creamy-white fibrous or granular powder. This product is soluble in water (10 mg/ml). However, it is very important to thoroughly disperse the particles in water with agitation before they will dissolve. Otherwise, they will lump and form a gelatinous membrane around the internal particles, preventing them from wetting completely. There are four dispersion techniques commonly used to prepare solutions of hydroxypropylmethylcellulose: dispersion in hot water, dry blending, dispersion in non-solvent medium, and dispersion of surface-treated powders.
The Uses of Hydroxypropyl methyl celluloseHydroxypropyl Methylcellulose is a gum formed by the reaction of propylene oxide and methyl chloride with alkali cellulose. it will gel as the temperature is increased in heating and upon cooling will liquefy. the gel temperature ranges from 60°c to 90°c, forming semifirm to mushy gels. it is used in bakery goods, dressings, breaded foods, and salad dressing mix for syneresis control, texture, and to provide hot viscosity. usage level ranges from 0.05 to 1.0%
BackgroundHypromellose, or hydroxypropyl methylcellulose (HPMC) , is a semisynthetic, inert, and viscoelastic polymer that forms a colloid solution when dissolved in water. It acts as a thickening agent, coating polymer, bioadhesive, solubility enhancer in solid dispersions, and binder in the process of granulation and in modified release formulations . It is a commonly used as a delivery component in oral pharmaceutical products that provides the release of a drug in a controlled fashion, effectively increasing the duration of release of a drug to prolong its therapeutic effects . Hypromellose is also found in eye drops as a lubricant .
Production MethodsA purified form of cellulose, obtained from cotton linters or wood pulp, is reacted with sodium hydroxide solution to produce a swollen alkali cellulose that is chemically more reactive than untreated cellulose. The alkali cellulose is then treated with chloromethane and propylene oxide to produce methyl hydroxypropyl ethers of cellulose. The fibrous reaction product is then purified and ground to a fine, uniform powder or granules. Hypromellose can then be exposed to anhydrous hydrogen chloride to induce depolymerization, thus producing low viscosity grades.Hydroxypropyl methyl cellulose is used as an ophthalmic lubricant, an emulsifier and a thickening and suspending agent. It is widely used as an excipient in pharmaceutical formulations. It acts as a food additive. Its eye drops are known as artificial tears, which are used to relieve eye dryness and soreness. It finds applications in various fields as emulsifier, film former, protective colloid, stabilizer, suspending agent, or thickener in foods. Pharmaceutic aid (suspending agent; tablet excipient; demulcent; viscosity increasing agent); hydrophilic carrier in drug delivery systems. In adhesives, asphalt emulsions, caulking compounds, tile mortars, plastic mixes, cements, paints.
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Aripiprazole (A771000) intermediate.
The Uses of 1-(2, 3-Dichlorophenyl)piperazine hydrochlorideThis product is intended for forensic and research purposes and it is an aripiprazole intermediate.
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N-Bromosuccinimide (NBS) is a reagent typically used in radical substitution and electrophilic addition reactions. In pure form it exists as a white solid but over time it will decompose to give off bromine which will give it a slight yellow/brown color.
Felbinac Is the active metabolite of the non-steroidal antiinflammatory agent, fenbufen. Applied topically as a gel to joints, it is useful in the symptomatic relief of articular inflammation and pain.
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2-Methyl-5-bromobenzoic acid is used in organic synthesis and pharmaceutical intermediates. It is used in the synthesis of 5-bromo-2-methyl-N-(quinolin-8-yl)benzamide, (5-Bromo-2-methylphenyl)(thiophen-2-yl)-methanone and 2-(5-bromo-2-methylbenzyl)-5-(4-fluorophenyl)thiophene.
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Di-tert-butyl azodicarboxylate (DtBAD) is a common reagent used in Mitsunobu reactions. Similar azodicarboxyates include DEAD and DIAD. Azo-type reagents such as ADDP are also used for Mitsunobu reactions.
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Jones Reagent is mixture of chromium trioxide in sulfuric acid which is used for Jones oxidation, typically with acetone as the solvent. Jones oxidation reactions are not commonly used anymore due to the toxicity of chromium (VI) reagents.Jones Reagent (EDTA methidiumpropylamide) is mixture of chromium trioxide in sulfuric acid which is used for Jones oxidation, typically with acetone as the solvent. Jones oxidation reactions are not commonly used anymore due to the toxicity of chromium (VI) reagents.
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2-Acetylaminopropionic acid is used as a biomarker for prostate cancer.N-Acetyl-L-alanine has been used to study its effect on cytosolic and mitochondrial reduction-oxidation sensitive green fluorescent protein (roGFP)ChEBI: An N-acetyl-L-amino acid that is L-alanine in which one of the hydrogens attached to the nitrogen is replaced by an acetyl group.2-Acetylaminopropionic acid is White Cyrstalline Solid
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Diphenyl chlorophosphateis used to prepare cyclohexyl-amidophosphoric acid diphenyl ester by reacting with cyclohexylamine. It is also used in the synthesis of alfa-substituted beta-lactams, anhydrides, esters and thioesters. It is also employed in the conversion of aldoximes to nitriles. Further, it is used in the preparation and reaction of enol phosphates, guanosine-adenosine-5', 5'-triphosphate, guanosine-cytidine-5', 5'-triphosphate, guanosine-uridine-5', 5'-triphosphate, diguanosine-5', 5'-diphosphate and diguanosine-5', 5'-triphosphate
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Chloroacetone was used in the synthesis of double-chain nonionic surfactants with an acid decomposition function via acid-catalyzed condensation with fatty alcohols (octyl, decyl and dodecyl). It was also used in the synthesis of meso-tetramethyl tetrakis-(4-phenoxy acetone)calix[4]pyrrole. It can also be used to make dye couplers for color photography and used in the Feist-Benary synthesis of furans.
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Methyl methoxyacetate is used in the preparation of 4-hydroxy-2-mercapto-5-methoxypyrimidine (II).ChEBI: Methyl methoxyacetate is a methyl ester.CLEAR COLORLESS TO SLIGHTLY BROWN LIQUID
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Diethyl Bromomalonate is a chemical constituent of the asymmetric cyclopropanation of chalcones. Also used in the preparation of nanaplatforms for NIR imaging-guided photodynamic therapy of cancer cel ls.
The Uses of DIETHYL BROMOMALONATEDiethyl bromomalonate is used in perfumes. It is also used to synthesize other compounds such as barbiturates, artificial flavorings, vitamin B1, and vitamin B6.
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2-Methoxyethoxymethyl chloride, is used as selectively cleaved under aprotic conditions in the presence of a wide range of OH-protected reagents. It is used as an OH-protecting reagent. An examples of the target molecule MEM Chloride is the side chain of roxithromycin. It is also used in the protection of the OH groups in serine and threonine during peptide synthesis. Some of the other applications include have the ability to coordinate to metals, which is thought to accelerate the cleavage by Lewis acids. The chelating ability of the MEM ether also makes it useful as a stereodirecting group in organometallic reactions, first noted in the stereo controlled addition of ?-methoxyvinyllithium to a carbonyl in the synthesis of taxusin.
Phenethylbromide is an analytical reference material that is structurally categorized as an organobromide. It is used in the synthesis of a variety of compounds, including fentanyl. Phenethylbromide is combined with 4-piperidinone to produce N-phenethyl-4-piperidone, which, as a precursor in the synthesis of fentanyl (Item Nos.ISO6019714719), is scheduled as a List I chemical in the United States. Phenethylbromide may be found as in impurity in samples of fentanyl produced using this pathway
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Preparation of high refractive index polyacrylates.Benzyl acrylate is used in the preparation of heptanoic acid benzyl ester. It is used to prepare polybenzylacrylate using azobisisobutyronitrile as initiator.
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Diethyl ethoxymethylenemalonate is used for synthesis of pyrido[3, 2-e]pyrimido[1, 2-c]pyrimidines. Initially, it was used to monitor lysine decarboxylase activity. It is useful in the determination of amino acids by precolumn derivatization by using reversed-phase high-performance liquid chromatography (HPLC). It plays an important role in the Gould-Jacobs reaction to prepare quinolines. For example, anile reacts with this reagent to give 4-hydroxyquinoline. It acts as an intermediate in the production of flumequine, which is a fluoroquinolone antibiotic.
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Diethyl phosphite (DEPI) is a versatile reactive intermediate used in the production of various phosphorus based substances. It may be used to prepare the nickel chloride-diethyl phosphite system, efficient catalyst for the cross-coupling reaction between various functionalized arylzinc halides and aryl bromides, triflates and activated chlorides.
It may be used:
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5-Chloroacetyl-6-chloro-1, 3-dihydroindol-2H-indone-2-one (cas# 118307-04-3) is a compound useful in organic synthesis.
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Mr. Pawan D Mourya (Dopran Pharma Healthcare)
Gala No.5, 2nd Floor, Building No. 4, Manish Compound, Rehnal Village, Bhiwandi, Thane, Maharashtra - 421302
http://www.dopranpharma.co.in
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