Agricultural urea N46 46% Properties of urea Urea, also known as carbamide, carbamide and urea. Pure urea is white, tasteless, odorless, needle shaped or prismatic crystal, with a melting point of 132.7 â?? under normal pressure. It is hygroscopic, deliquescent, hydrolyzable, and weakly alkaline. It is made into compound fertilizer with acid fertilizer. Urea is an organic compound composed of carbon, nitrogen, oxygen and hydrogen. It is a white crystal. Urea is one of the simplest organic compounds. The most important use of urea is as fertilizer. Its nitrogen content is more than 46%. After being converted into ammonium carbonate in soil, urea is hydrolyzed and absorbed by plants. It is the nitrogen fertilizer with the highest nitrogen content at present. Molecular formula of urea: CO (NH2) 2, molecular weight 60.06, density 1.335g/cm �³ï¼? The melting point is 132.7 â??. Soluble in water and alcohol, insoluble in ether and chloroform. It is slightly alkaline. It can react with acid to form salt. It has hydrolysis. Condensation reaction can be carried out at high temperature to produce biuret, triuret and cyanuric acid. Heat to 160 â?? and decompose to generate ammonia gas and turn into cyanic acid at the same time. Urea can be hydrolyzed into ammonia and carbon dioxide under the action of acid, alkali and enzyme (acid and alkali need to be heated). Unstable to heat, heat to 150 â??ï½? 160 â?? to deamination to biuret. Urea is easily soluble in water, 105g can be dissolved in 100ml water at 20 â??, and the aqueous solution shows neutral reaction. There are two kinds of urea products: crystalline urea is white acicular or prismatic crystal with strong hygroscopicity; Granular urea is a translucent particle with a particle size of 1~2mm, which has a smooth appearance and improved moisture absorption. Urea is a physiologically neutral fertilizer, which does not leave any harmful substances in the soil and has no adverse effects after long-term application. However, a small amount of biuret, also known as biuret, will be produced when the temperature is too high during granulation, which has an inhibitory effect on crops. Urea is molecular before conversion and cannot be adsorbed by soil, so it should be prevented from being lost with water; The ammonia formed after conversion is also volatile, so urea should also be deeply covered with soil. Urea is the first synthetic organic substance and widely exists in nature, such as 0.4% urea in fresh human feces. The new version of national standard GB/T2440-2017 for urea has been officially implemented since July 1, 2018. Compared with the replaced 2001 standard, certain adjustments have been made. New standard GB/T2440-2017
CASå?·:57-13-6 Urea for vehicles, agricultural urea, urea N46ï¼? When the temperature of urea is below 20 â?? and the relative humidity is below 70%, it will not only not absorb moisture, but also evaporate water and reduce its water content; When the temperature exceeds 20 â?? and the relative humidity is higher than 80%, it starts to absorb moisture, and becomes paste when it is serious. When the air is dried again, it will re agglomerate, which is only inferior to ammonium nitrate. When the urea aqueous solution is at 80 â??, hydrolysis and decomposition reactions will occur, forming ammonium carbamate, ammonia gas and carbon dioxide respectively. Under acid and alkaline conditions, urea will decompose faster when it is heated. Urea is easy to combine with straight chain carbohydrates to form crystalline additional compounds; It forms a variety of double salts with various inorganic compounds, such as Ca (NO3) 2 �· 4CO (NH2) 2, NH4Cl �· CO (NH2) 2, CaChemicalbookSO4 �· 4CO (NH2) 2, MgSO4 �· 4CO (NH2) 2 �· 3H2O, Mg (NO3) �· 4CO (NH2) 2 �· 2H2O, etc; It is easy to form urea phosphate, dicalcium phosphate and water with monocalcium phosphate, namely Ca (H2PO4) 2 �· H2O+CO (NH2) 2 â?? H3PO4 �· CO (NH2) 2+CaHPO4+H2O; With nitric acid, it is easy to form urea nitrate, CO (NH2) 2+HNO3 â?? CO (NH2) 2 �· HNO3, which combines and relaxes the two; It can combine with formaldehyde to form urea formaldehyde compounds (uric acid rubber shrinks), in which the higher proportion of formaldehyde is urea resin, and the lower proportion is slow-release (effective) urea.
Product name Tetramethylurea CAS NO.: 632-22-4 MF: C5H12N2O Structural type: Properties: Colorless transparent liquid. Slightly pleasant smell. It can be miscible with water, petroleum ether and most commonly used organic solvents. Product specification:ï¼?Q/CFH 14-2019ï¼? Items Specification Appearance Colorless Transparent Liquid Mass fraction of tetramethylurea, % â?¥ 99.5 water content,% â?¤ 0.5 Use: It is mainly used as an intermediate of insecticide; Advanced solvent, used in dye and other industries; As an intermediate of surfactant. Packaging, storage and transportation: Galvanized iron drum packaging, 180kg / barrel.
Our company sells the products produced by Chongqing Changfeng Chemical Industry Co., Ltd., the world's largest benzophenone manufacturer; First class quality This product can be used in perfumery to produce perfume fixative. UV absorbers for polymers, photosensitizers for film coatings, and pigments. It can also be used to synthesize antihistamines, bacteriostatic agents, etc. Project Index Melting point 47.5 49.0 Benzophenone purity 99.80 Benzene content 0.030 Benzoic acid content 0.0020 4-methylbenzophenone content 0.030 4-chlorobenzophenone content 0.030 Chroma number APHA 50 Our company provides Benzophenoneï¼?Uv Absorber, Ultraviolet Absorbent, Hindered Amine Light Stabilizer, Light Stabilizer, Uv Absorber, Antioxidant, Optical Brightener, Photoinitiator
Use: It is used as an intermediate in the production of pesticides, ceftiofur and organic chemicals. It is mainly used in the synthesis of sulfadiazine drugs and the production of pesticides, fungicides and herbicides. It is also used in the production of new pesticides, such as dicofone, dicofone, kecaojin, etc .
For pharmaceutical intermediates 2-Cyanophenol Product name 2-Cyanophenol CAS NO.: 611-20-1 MF: C7H5NO Structural type: Properties: Grayish white to light brown powder.Items Specification Appearance White or off white powder Salicylnitrile content, % 98.0 Salicylamide content,% 0.5 water content,% 0.5
1. Chopped basalt fiber Basalt fiber is a kind of inorganic fiber material. Chopped basalt fiber is an inorganic mineral fiber with a length of less than 50mm and can be evenly dispersed in cement concrete. 2. Characteristics of chopped basalt fibers (1) The naturalness of raw materials. Because the raw material for producing continuous basalt fiber depends on the natural volcanic extrusive rock, there are no ingredients harmful to human health except that it is inherently high in chemical stability and thermal stability. (2) Comprehensive performance. Basalt fiber is acid resistant and alkali resistant. It is both low temperature and high temperature resistant. It is insulated and insulated by heat and electricity. Its tensile strength is higher than that of large tow carbon fiber. Its elongation at break is even better than that of small tow carbon fibers. It has high compressive strength, shear strength and adaptability to aging, and has good comprehensive properties in harsh environment. (3) Low cost. The price of basalt fiber used in cement concrete is significantly lower than that of steel fiber and polyester fiber. (4) Natural compatibility. Basalt fiber is a typical silicate fiber, which is easy to disperse when mixed with asphalt concrete, cement concrete and mortar. The newly mixed basalt fiber concrete has stable volume, good workability and durability, and has superior high temperature resistance, anti-seepage, crack resistance and impact resistance.
1. Basalt short fiber - a new material to replace steel fiber. Basalt short fiber is an inorganic mineral fiber with a length of less than 50mm, which can be evenly dispersed in cement concrete. 2. Characteristics of basalt short fiber (1) the specific gravity of steel fiber is 7.8 and that of cement concrete is 2.5. After mixing, the specific gravity of steel fiber is higher than that of cement, and the cement will sink and have poor dispersion. The specific gravity of basalt short fiber is 2.6, which is basically equivalent to that of cement concrete. After mixing, it does not sink, has good dispersion, is degradable, and is green. The road surface will not be as hard as steel fiber, resulting in car driving noise.. (2) Basalt staple fiber is a real "multifunctional" fiber. Acid and alkali resistance (especially alkali resistance, fully applicable to cement concrete), low and high temperature resistance, insulation and sound insulation. The tensile strength is three times that of steel fiber. The corrosion resistance of basalt fiber is better than that of steel fiber. The compressive strength is 20% higher than that of steel fiber, which is suitable for harsh environment. It has excellent comprehensive performance. (3) Low cost. The price of basalt fiber used in cement concrete is significantly lower than that of 50% steel fiber. (4) Natural compatibility. Basalt fiber is a typical silicate fiber, which is easy to disperse when mixed with cement concrete and mortar. Fresh basalt fiber concrete has stable volume, good workability and durability, and has excellent high temperature resistance, impermeability, crack resistance and impact resistance.
Basalt Fiber Series Fabric 1. Production: basalt fiber fabric is made of continuous basalt fiber textile yarn through warping, weaving and coating. 2. Weaving methods according to requirements: unidirectional cloth, plain cloth, twill cloth and grid cloth. 2. Application: reinforced mesh cloth, fireproof cloth, fishing rod cloth, luggage decoration cloth, electrical insulation cloth, bulletproof cloth, etc. 3. Packaging: 100M / roll (or customized as required). 4. Performance: high strength, high temperature resistance, good electrical insulation, non hygroscopic, acid and alkali corrosion resistance.High temperature resistance 1000 �° C 5. Specification and model: bfw16 * 20-100 (120) BFW: basalt fiber fabric;Completely replace carbon fiber sheet building reinforcement 16 * 20: the warp and weft density of yarn is 16 and 20 pieces / cm respectively; 100: the width of the fabric is 100 cm; (120): the mass per unit area of fabric is 120 g / m2. BFNP5*5-200(160) BFNP: basalt fiber mesh cloth (coated and shaped); 5 * 5: the longitude and latitude mesh size of the cloth surface is 5 and 5mm; 200: the width of the grid is 200 cm; (160): the weight of grid cloth per unit area is 160g / m2.
Produced by Chongqing Hesheng Longgang Technology Co., Ltd. (manufacturer) Basalt fiber reinforcement (new material to replace reinforcement) Product Description: basalt fiber reinforced bar (BFRP) is a new composite material formed by pultrusion process. It is made of basalt fiber as reinforcement, resin, filler and curing agent. Now it has been widely used in construction, highway and bridge constructionã?? Basalt fiber reinforcement can completely replace ordinary steel reinforcement and deformed steel; Compared with ordinary reinforcement, it has strong advantages: (see Annex for technical parameters) 1. The cost is the same as that of ordinary reinforcement; 2. The strength is 200% of the ordinary reinforcement with the same specification and diameter; The tensile strength reaches 1100mpap; The reinforcement is only 450MPa, 3. Basalt fiber reinforcement, especially with high acid, alkali and corrosion resistance, is a kind of electrical insulator that will never rust. 4. Basalt fiber reinforced bar, which is non-magnetic. It has high tolerance to the moisture concentration in cement mortar and the penetration and diffusion of carbon dioxide, and can prevent the corrosion of concrete structure in harsh environment, so as to improve the durability of buildings and bridges. 5. The specific gravity of basalt fiber reinforcement is 2.1g/cm3; The specific gravity of steel and reinforcement is 7.85/cm3; The diameter weight of the same specification is 370% lighter than that of steel reinforcement, and the strength is 200% of that of steel reinforcement. 6. The physical properties of basalt fiber reinforcement are higher than that of steel reinforcement, and the cost is the same as that of steel reinforcement, which is of epoch-making significance to replace steel reinforcementã??
The basalt fiber roving of our company adopts the new tank kiln method and 2400 hole large leakage plate to form basalt roving products With a series of advantages such as high strength, large modulus, good temperature resistance, good chemical corrosion resistance and good electrical insulation, basalt is produced with homogenized basalt raw materials, with excellent performance, stable quality and small dispersion coefficient. Basalt fiber roving is a new material to replace glass fiber and carbon fiber
Nitrocellulose nitrocellulose chips, nitrocellulose solution.
Nitrocellulose, nitrocellulose solution, nitrocellulose chips and nitrocellulose bonds.
Nitrocellulose, nitrocellulose chips, nitrocellulose solution, ceppa, dcpp.
Nitrocellulose, nitrocellulose chips, nitrocellulose solution, pigment solution.
Nitrocellulose lacquer.
Sebacic acid has a wide range of uses, mainly used to prepare sebacic acid esters, such as dibutyl sebacate, dioctyl sebacate and Diisooctyl sebacate. These esters can be used as plasticizers for plastics, cold resistant rubber, polyamide, polyurethane, alkyd resin, synthetic lubricating oil, lubricating oil additives, spices, coatings, cosmetics, etc. It can also be used as raw material for the production of nylon 1010, nylon 910, nylon 810, nylon 610 and nylon 9, and as raw material for high temperature resistant lubricating oil diethylhexyl ester. It is also the raw material for the production of plasticizer, softener and solvent for alkyd resin (used as surface coating, plasticized nitrocellulose coating and urea resin varnish) and polyurethane rubber, cellulose resin, vinyl resin and synthetic rubber. Hot selling Sebacic acid Decanedioic Acid with new batch CAS 111-20-6
Laxogenin is a plant based steroid. It can be found in small quantities of green (plant based) foods. It is derived from a certain plant (smilax sieboldii) and promotes anabolic activity within the body.But no side effects or potential health risks is found yet. More information of Isophorone CAS:78-59-1 1)Used as an intermediate in manufacturing mainly polyurethane field compounds such as isophorone Diamine, isophorone Diisocyanate, Trimethylcyclohexanone used for Light stable weather resistant urethane coating. 2)It is used as a solvent for resin, lacquers,inks & PVC. 3)It is used in formulating Pesticides, Herbicides. 4)It is used in vinyl chloride/acetate-based coating systems for metal cans, other metal paints,nitrocellulose, and printing inks for plastics.
Size 1 litre 5 litres 10 litres 25 litres 200 litres DD thinner for all isocyanate-curing polyurethane resin paints. Ideal for all reactive 1- and 2-component polyurethane resin paints. Also suitable for nitrocellulose paints. With medium evaporation Weight n/a Size 1l, 5l, 10l, 25l, 200l
Flame retardant-ceppa, nitrocellulose, nitrocellulose chips, nitrocellulose solution.
