Nanjing Chemical Material Corp.

  Features of Methyl Iodide Product Name: Methyl iodide   Chemical Formula: CH3I   CAS  74-88-4   Dangerous Grade: 6.1   Technical Data of Methyl Iodide   Package and Storage of Methyl Iodide 100kg/drum or 200kg/drum   Store in a cool, dry place. Keep container closed when not in use   Application /Application Industries: Pharmaceuticals   Catalyst   M ethyl iodide cas no .74-88-4 is a halogenated hydrocarbon, and its molecular formula is CH3I, MeI, which is an iodine substitute for methane. It is a volatile liquid with high density at room temperature, dipole moment 1.59D, refractive index 1.5304 (20 ° C, D), 1.5293 (21 ° C, D). Methyl iodide is miscible with common organic solvents. Pure color is colorless. When exposed to sunlight, it will decompose iodine and be purple. It can be removed by adding metallic copper. Methyl iodide is present in small amounts in rice fields. Methyl iodide is a methylation reagent commonly used in or...

  Features of L-Hydroxyproline Product Name: L-Hydroxyproline Chemical Formula: Chemical Formula: C5H9NO3 CAS  51-35-4 Dangerous Grade: None Technical Data of L-Hydroxyproline   Package and Storage: 25kg/drum Store in a cool, dry place. Store in a tightly closed container Application /Application Industries: Flavors&Fragrance: flavoring agent, nutrient supplements Pharmaceuticals: for the synthesis of antibiotics/anti-hypertension drug   If you want to know more about monoammonium glycyrrhizinate , please visit our website.      

  Features of IsopropylEther Product Name: Isopropyl Ether Chemical Formula: C6H14O CAS No.: 108-20-3 Dangerous Grade: 3 Technical Data of Isopropyl Ether   Package and Storage: 140kg/drum Store in a cool, dry place. Keep container closed when not in use Application /Application Industries: Reagent Pharmaceuticals Coating   Isopropyl ether is a good solvent for animal, plant and mineral oils. It can be used to extract nicotine from tobacco. It is also a good solvent for paraffin and resin. Industrially, diisopropyl ether and other solvents are often used in paraffin-based oils. Dewaxing process. As a solvent, it is also used in pharmaceuticals, smokeless gunpowder, paints and paint cleaning. Diisopropyl ether has high octane and antifreeze properties and can be used as a gasoline blending agent. This product is easy to form peroxide, which will explode when shaken, often adding benzylaminophenol as a stabilizer. The anesthetic effect of diisopropyl ether is lighter than e...

  Polyester polyol , which are organic substances, are usually formed by condensation (or transesterification) of an organic dicarboxylic acid (anhydride or ester) with a polyol (including a diol) or by polymerization of a lactone with a polyol. The dibasic acid is phthalic acid or phthalic anhydride or an ester thereof, adipic acid, halogenated phthalic acid or the like. The polyhydric alcohol is ethylene glycol, propylene glycol, diethylene glycol, trimethylolpropane, pentaerythritol or the like. Different types of polyester polyols have different properties due to different types or different preparation processes. Several indicators that are important for polyester polyols are hydroxyl number, acid value, moisture, viscosity, molecular weight, density, and color. Characteristics and uses of polyether polyol products : Polyester-based polyurethane contains a large number of polar groups such as ester groups and amino groups in the molecule, and has strong cohesive strength and a...

  Synthesis of DMC-based polyether polyol by a continuous method   A certain amount of DMC catalyst is taken and uniformly dispersed in a certain amount of small molecule initiator. Add 0.5 kg of the mixture of the initiator in the small test reactor. The vacuum was replaced 1-2 times with N2, and the N2 pressure was maintained at 0.1 MPa. After heating, stirring and raising the temperature to a certain temperature, the quantitative PO was introduced into the continuous autoclave with nitrogen gas for induction. When the induction is successful (the temperature in the kettle rises and the pressure drops), the PO is continuously passed to carry out the reaction. Open the outer loop and continue to pass the PO into the continuous kettle.   When the liquid in the reaction vessel is full, the PO, DMC catalyst and the initiator are continuously added to the kettle at a certain ratio and a certain speed through the power system. Continuous discharge is started when a certain pr...

  1. Preparation of Ethyl Bromide   from ethyl alcohol and hydrobromic acid Start with a 1-liter double neck round bottom flask with a drop funnel and wide bend. The bend is connected to a long and efficient condenser assembly and receiver for downward distillation. First, place 281ml (or 415 g) 48% hydrobromic acid in a flask, then add 65ml (or 120 g) of concentrated sulfuric acid in batches, while shaking. As it cools, a small quantity of 145ml (or 100 g) 95% ethanol is slowly added to the mixture of sulfuric acid and hydrobromic acid. Then 109ml (or 200g) of concentrated sulfuric acid is slowly added to the drop funnel, and the ethyl bromine obtained by slow distillation is collected in the cold receiver flask. The crude ethyl bromine was washed with equal volume of concentrated hydrochloric acid, then washed with water and a small amount of 5% sodium bicarbonate solution, then washed with water, and finally dried the ethyl bromine with anhydrous calcium chloride. The crude...