Acetylacetone CAS 123-54-6
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- Appearance: Yellow liquid
- Purity: 99. 0%min
- Stock: In stock
- Sample: Available
- Zhishang Chemical: Acetylacetone Supplier & Manufacturer
Acetylacetone: The Complete Guide
Acetylacetone for Sale
Basic Info of Acetylacetone
2,4-Pentanedione; Acetyl 2-propanone; Acetyl-2-propanon
Feed additives; Pharmaceutical, pesticide, dye intermediates; Organic raw materials
What is Acetylacetone?
Acetylacetone is a β- Diketone, which is pentane, in which the hydrogen at settings 2 and also 4 is substituted by an oxo group. It is a conjugated acid of acetylacetone. Pentane-2,4-dione is colorless or yellow fluid. Less thick than water. Vapor is larger than air. Made use of as a solvent for paints and also varnishes.
Acetylacetone, additionally known as diacetylmethane as well as pentanedione, is a by-product of acetone, with molecular formula ch3coch2coch3. It is a colorless to light yellow transparent fluid. It is typically a mix of two tautomers of enol type as well as keto kind. Both are in vibrant stability. The enol type isomers form hydrogen bonds within the particle. In the mix, the keto kind accounts for around 18% and also the enol kind accounts for 82%. The oil ether remedy of the mixture is cooled to – 78 ℃, as well as the enol type is sped up as a solid to divide both; When the enol kind recuperates to area temperature, it is immediately in the above-mentioned balance state.
Acetylacetone has a pleasurable odor. Flammable. The family member molecular weight is 100.13. Loved one density 0.9721 (25 ℃). Melting point: – 23.5 ℃. Boiling point: 140.5 ℃, 139 ℃ (99.458) × 103Pa)。 Flash point: 41 ℃. The refractive index is 1.4494. Vapor stress: 0.800 × 103Pa(20 ℃)。 Liquified in water (16.9 at 20 ℃, 34 at 80 ℃), ethanol, benzene, chloroform, ether, acetone, ethyl acetate and antarctic acetic acid. It is easily decayed into acetic acid and also acetone by water. The molecular structure of acetylacetone is a saturated binary ketone in which a methylene team connects 2 hydroxyl teams. This type is typically called β Diketone. Acetylacetone is also the simplest saturation β Diketone is a derivative of acetone. It is chemically active as well as reacts with ferric chloride liquid service, showing a crimson shade. This item can react with almost all steel hydroxides, carbonates or acetate to develop a complex. The general formula of the complex is (c5h7o2) · m, where m is a steel and also N is a compound of the steel. Most of these substances are steady and several are soluble in organic solvents. This item can respond with chlorine under light. Only the hydrogen in the methyl groups at both ends can be changed by chlorine. This product responds with sodium to release hydrogen gas to create sodium acetylacetone. Acetylacetone has an anesthetic impact, aggravating the skin and mucosa, and it can be utilized at high focus (100 × Above 10-6), it is very easy to generate queasiness, migraine, wooziness as well as various other poisoning signs. Rat dental ld50970mg/ kg.
- Pentanedione, likewise referred to as acetylacetone, is an intermediate of the fungicides methyl pyraclostrobin, azoxystrobin and also the herbicide rimsulfuron.
- Acetylacetone is an intermediate in natural synthesis, and it creates amino-4,6-dimethylpyrimidine with guanidine, which is a vital pharmaceutical resources. It can be made use of as a solvent for cellulose acetate, an additive for gasoline and also lubes, a desiccant for paint and also varnish, a fungicide, as well as an insecticide.
- Acetylacetone can likewise be used as a driver for petroleum cracking, hydrogenation as well as carbonylation reactions, and also an oxidation accelerator for oxygen. It can be used to eliminate steel oxides in permeable solids and also to deal with polypropylene drivers. In European and American nations, more than 50% are utilized in livestock antidiarrheal drugs as well as feed additives.
- Along with the regular properties of alcohols as well as ketones, it also shows a deep red color with ferric chloride as well as kinds chelates with numerous steel salts. By acetic anhydride or acetyl chloride and also acetone condensation, or by the response of acetone as well as ketene acquired. It is used as steel extractant to different trivalent and tetravalent ions, paint as well as ink desiccant, chemicals, chemicals, fungicides, solvents for high polymers, reagents for the determination of thallium, iron, fluorine, and natural synthesis intermediates, etc.
- An indication for iron(III) complexometric titrations. Used to change guanidine groups in healthy proteins and also amino teams in healthy proteins.
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Application of Acetylacetone
Acetylacetone is a vital natural synthesis intermediate, extensively used in pharmaceutical, fragrance, pesticide as well as various other sectors; it is also utilized as a solvent for cellulose acetate, a desiccant for paints as well as varnishes, and an essential analytical reagent; because of the existence of the enol type, Acetylacetone can communicate with metals such as cobalt (II), cobalt (III), beryllium, light weight aluminum, chromium, iron (II), copper, nickel, palladium, zinc, indium, tin, zirconium, magnesium, manganese, scandium and also thorium. Steel ions create chelates, which can be made use of as additives for fuel oil as well as lubricating oil;
Using its chelating effect with metals, it can be made use of as a cleaner for steels in micropores; as catalysts, material cross-linking agents, resin treating accelerators; resin and also rubber ingredients; Framework response, synthesis of low-molecular-weight unsaturated ketones, polymerization as well as copolymerization of low-carbon olefins, etc; utilized as natural solvent for cellulose acetate, ink, as well as pigment; resources for preparing pesticides as well as fungicides, livestock antidiarrheals and feed ingredients; Creating agent for infrared reflective glass, transparent conductive film (indium salt), superconducting thin film (indium salt); acetylacetone metal complex has unique shades (copper salt environment-friendly, iron salt red, chromium salt purple) and also is insoluble in water.
Synthesis of Acetylacetone
Acetylacetone is a commercial bulk chemical with many applications. However, the traditional manufacturing methods have many disadvantages, such as many steps, harsh conditions, low yield, environmental problems and so on, which hinder the further application of petrochemical acetylacetone. Compared with traditional chemical methods, biosynthetic methods have the advantages of environmental friendliness, mild conditions, high selectivity and low potential cost. There is an urgent need to develop a biosynthetic route for acetylacetone to avoid the current problems. Traditionally, acetylacetone is produced by chemical route using acetone and vinyl ketone. Vinyl ketone is produced by pyrolysis of acetone or acetic acid at 700-800 ° C. the by-products are carbon monoxide, methane and hydrogen. Specifically, in the presence of a strong acid catalyst, the esterification reaction of ketene and acetone forms isopropyl acetate (IPA). Then, using metal molybdenum as catalyst, IPA was converted to acetylacetone at 500-600 ° C, with a yield of only about 45%. In a word, this chemical route has many disadvantages, such as many steps, harsh conditions, low yield and environmental problems, which hinder the further application of acetyl acetylacetone. In order to solve this problem, it is necessary to develop new methods for preparing acetylacetone. Compared with traditional chemical methods, biosynthesis is expected to have the advantages of environmental friendliness and mild conditions. IPA is converted to acetylacetone with metal molybdenum as catalyst at 500-600 ° C, and the yield is only about 45%. In a word, this chemical route has many disadvantages, such as many steps, harsh conditions, low yield and environmental problems, which hinder the further application of acetyl acetylacetone. In order to solve this problem, it is necessary to develop new methods for preparing acetylacetone. Compared with traditional chemical methods, biosynthesis is expected to have the advantages of environmental friendliness and mild conditions. IPA is converted to acetylacetone with metal molybdenum as catalyst at 500-600 ° C, and the yield is only about 45%. In a word, this chemical route has many disadvantages, such as many steps, harsh conditions, low yield and environmental problems, which hinder the further application of acetyl acetylacetone. In order to solve this problem, it is necessary to develop new methods for preparing acetylacetone. Compared with traditional chemical methods, biosynthesis is expected to have the advantages of environmental friendliness and mild conditions. In order to solve this problem, it is necessary to develop new methods for preparing acetylacetone. Compared with traditional chemical methods, biosynthesis is expected to have the advantages of environmental friendliness and mild conditions. In order to solve this problem, it is necessary to develop new methods for preparing acetylacetone. Compared with traditional chemical methods, biosynthesis is expected to have the advantages of environmental friendliness and mild conditions.
The biosynthesis pathway of acetylacetone was constructed by reversing its biodegradation pathway, and acetylacetone was successfully produced by overexpressing acetylacetone lyase (Dke1) of Acinetobacter yoelii in E. coli. Based on sequence alignment and structural analysis, several promising amino acid residues were selected for enzyme improvement, and the yield of acetylacetone was increased by site directed mutagenesis of Dke1. The acetylacetone production capacity of double mutant (k15q / a60d) was the highest, 3.6 times that of wild-type protein. Finally, the strain accumulated 556.3 ± 15.2 mg / L acetylacetone in batch fed fermentation under anaerobic conditions.
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