CAS NO 62-56-6 thiourea

CAS NO 62-56-6 thiourea

Production methods 1 with milk in the negative pressure, cooling under the absorption of hydrogen sulfide to generate calcium hydrogen sulfide solution. The thiocalcium and calcium cyanamide (lime nitrogen) 1: 5 molar ratio, at about 80 ° C for 3h, thiourea solution was obtained, filtered, concentrated, cooled and crystallized, filtered and dried to give the finished thiourea. In addition, ammonium thiocyanate method and diazomethane method can also be obtained. 2. Synthesis of barium sulfide and hydrochloric acid (or sulfuric acid) reaction with lime milk vacuum absorption, and then reacted with lime nitrogen, filtered, cooled crystallization, centrifugation, drying, prepared thiourea products. 3 with milk in the negative pressure, cooling under the absorption of hydrogen sulfide to generate calcium hydrogen sulfide solution, calcium hydrosulfide and calcium cyanamide reaction, which was thiourea solution. After filtration, concentration, cooling and crystallization, drying, pure thiourea. … Use This product is used to synthesize sulfathiazole, methionine and fat pigs and other drugs raw materials. For dyes and dyeing auxiliaries, resins and pressed powder raw materials. It is also used as a vulcanization accelerator for rubber, a flotation agent for metal minerals, a catalyst for phthalic anhydride and fumaric acid, and as a metal anticorrosion agent. As a photographic material, it can be used as a developer and a toner. Can also be used for electroplating industry. Thiourea is also used in diazo photosensitive paper, synthetic resin coatings, anion exchange resins, germination enhancers, fungicides and many others. Thiourea is also used as a fertilizer. Medically used as an intermediate for the manufacture of medicines. Rubber industry as a vulcanization accelerator. Mining industry as a flotation agent. Also used as fabric, paper processing agent, auxiliaries. Analysis reagents. For bismuth, osmium, rhodium, selenium, lead, tellurium, nitrite, etc. Determination. Determination of osmium complex indicator. For the preparation of epoxy curing agent fast. Also used as a toughening agent for melamine-formaldehyde resin adhesives. Pharmaceutical industry for the manufacture of sulfathiazole, methionine, pipemidic acid and anti-thyroid drugs. Organic synthesis for the manufacture of methyl thiourea, diethyl thiourea, diphenylthiourea, thiourea dioxide and other thiourea derivatives. Pesticide industry for the manufacture of pesticides. Also used as azo photosensitive paper reductant, metal rust inhibitor, nylon and polyester fiber processing aids, rubber vulcanization accelerator, mineral flotation agent, organic synthesis catalyst, plating additives. Hydrofluoric acid pickling inhibitor for pickling copper removal agent. In ammonia triacetin zinc, thiourea can be used as a brightener, but also improve the cathode polarization, the coating luster, crystal meticulous, to improve the coating of the ability. For organic synthesis, but also for drugs, rubber accelerator, gold-plated materials.

Product expansion
1> Cosmetic Raw Materials: Cosmetics is a variety of raw materials through a reasonable deployment of processing from the compound mixture. Cosmetics with a wide range of raw materials, different performance. According to the raw material properties and uses of cosmetics, can be divided into matrix materials and auxiliary raw materials in two categories. The former is a class of cosmetics in the main raw materials, cosmetics in the possession of a large proportion of the cosmetics play a major role in the role of the material. The latter is the formation of cosmetics, stability or to give color, smell and other characteristics of the role of these substances in the cosmetic formula is not used, but it is extremely important. Cosmetics are natural, synthetic or extracted from the role of different substances as raw materials, by heating, mixing and emulsification and other production processes processed from the chemical mixture.
2> Active Pharmaceutical Ingredients(API): API refers to the raw materials in the production of various types of preparations, which is the active ingredient in powder,crystal and paste for medicine use through chemical synthesis,plant extract, and preparations of biotechnology institute.It is one substance or mixture during the medicine making period, it can not be taken directly by patients.
3> Fragrance And Spices: Spice is a substance that can be scented by smelling or scented by taste, and is the raw material for the preparation of the fragrance. Spices are an important part of fine chemicals, it is composed of natural spices, synthetic spices and single fragrance.
4> Organic Raw Material: Intermediates are also known as organic intermediates. The use of coal tar or petroleum products as raw materials to produce dyes, pesticides, pharmaceuticals, resins, additives, and other intermediates.
5> Chemicals Used In Paints: Paint, the traditional Chinese name is paint. So-called coating is coated on the surface of the object that be protected or be adornment, and with the continuous film coating to form strong adhesion, usually in resin, or oil, or emulsion is given priority to, add or not add pigment, filler, add the corresponding additives, organic solvents or water preparation of viscous liquid.