Shaanxi BLOOM Tech Co., Ltd. is one of the most experienced manufacturers and suppliers of diethylhexyl phthalate cas 117-81-7 in China. Welcome to wholesale bulk high quality diethylhexyl phthalate cas 117-81-7 for sale here from our factory. Good service and reasonable price are available.
Diethylhexyl phthalate generally refers to (DEMP), also known as di (2-ethylhexyl) phthalate, which is an organic compound with CAS 117-81-7 and chemical formula C24H38O4 and CAS 117-81-7. Colorless or light yellow viscous liquid with a special odor. It can be miscible with organic solvents such as mineral oil and hexane, but is almost insoluble in water. It has good compatibility with most industrial resins. It is partially soluble in cellulose acetate and polyvinyl acetate. It is often used as a plasticizer for plastic products such as polyvinyl chloride (PVC). It can increase the elasticity and toughness of plastics and is widely used in the plastic industry. But its impact on the human body and environment is controversial. Some studies suggest that it may have negative impacts on human health, including disruptions to the endocrine and reproductive systems. May have potential impacts on human health, therefore there is a potential occupational carcinogenic risk. The Occupational Safety and Health Administration (OSHA) and the National Institute of Occupational Safety and Health (NIOSH) have established exposure limits.
|
Chemical Formula |
C24H38O4 |
|
Exact Mass |
390 |
|
Molecular Weight |
391 |
|
m/z |
390 (100.0%), 391 (26.0%), 392 (2.7%) |
|
Elemental Analysis |
C, 73.81; H, 9.81; O, 16.39 |
|
|
|
Melting point - 50 ° C, Boiling point 386 ° C (lit.), Density 0.985 g / ml at 20 ° C (lit.), Vapor density > 16 (vs air), Vapor pressure 1.2 mm Hg (93 ° C), Refractive index N20 / D 1.488, Flashpoint 405 ° f, Storage condition 2-8 ° C, Solubility with mineral oil and hexane (U.S. EPA, 1985), Form liquid, Color APHA: ≤ 10, Odor very light, characteristic, Water-soluble negligible, Freezing point < - 60 ℃, BRN 1890696, Henry's Law Constant(x 10-5 atm?m3/mol): 1.1 at 25 °C (calculated, Howard, 1989), Potential occupational carcinogen NIOSH REL: TWA 5, STEL 10, IDLH 5,000; OSHA PEL: TWA 5; ACGIH TLV: TWA 5 (adopted).
Di (2-ethylhexyl) phthalate (DEHP), as an important phthalate ester compound, has been widely used in various fields such as industry, medicine, and daily life. However, it is also strictly regulated due to its potential health and environmental risks.
Plastic plasticizer:
Main application: DEHP is the most commonly used plasticizer for polyvinyl chloride (PVC) plastic products, which can significantly enhance the elasticity and toughness of plastics. The addition amount in PVC products is usually 1% to 40%, depending on the product performance requirements.
Application scope: Widely used in industries such as rolled film, synthetic leather, wire and cable, flooring manufacturing, automotive production, etc. For example, DEHP can make the PVC cable sheath soft and resistant to bending, extending its service life.
Advantages: Good compatibility with PVC, high plasticizing efficiency, low volatility, excellent weather resistance and water resistance, and low cost.
Other industrial uses:
Hydraulic oil: Diethylhexyl phthalate can serve as a lubricating medium for hydraulic systems, providing stable lubrication performance.
Capacitor dielectric: Used as an insulating medium in capacitors to improve their electrical performance.
Fluorescent rod solvent: As a solvent in fluorescent rods, it helps to evenly disperse fluorescent substances and stabilize luminescence.
Coatings and adhesives: used to improve the flexibility and adhesion of coatings and adhesives.
Medical device manufacturing:
Main applications: DEHP is commonly used in the manufacturing of medical devices related to human health, such as blood bags, jet injectors, artificial heart membranes, uterine contraceptives, etc.
Function: By plasticizing, PVC medical devices are made soft and easy to process, while maintaining a certain mechanical strength.
Risk: DEHP may migrate from medical devices to medication or blood, posing potential risks to patient health. Therefore, many countries and regions have imposed strict restrictions on the use of DEHP in medical devices.
Alternative development:
Background: Due to the potential health risks of DEHP, the medical industry is actively seeking alternatives.
Substitutes: including other phthalates (such as DINP, DIDP) and non phthalates (such as DINCH, citrate) plasticizers. These alternatives have lower safety risks while maintaining similar industrial performance.
Daily supplies:
Clothing: DEHP is often found in flexible PVC materials such as raincoats, rain boots, gloves, etc., providing a soft and comfortable wearing experience.
Toys and child care products: Many plastic parts of toys and child care products also use DEHP as a plasticizer. However, due to the high sensitivity of children to chemicals, many countries and regions have imposed strict limits on the content of DEHP in children's products.
Food contact materials:
Application: Although the use of DEHP in food contact materials is strictly limited, it may still be used in certain situations. For example, as a plasticizer for food packaging materials or as a lubricant for food processing equipment.
Risk: DEHP may migrate from food contact materials to food, posing potential risks to human health. Therefore, many countries and regions have established strict regulations to limit the content and migration of DEHP in food contact materials.
Regulations: For example, China stipulates that the specific migration amount of DEHP in food contact materials shall not exceed 1.5mg/kg; The EU limits the content of DEHP in children's products to no more than 0.1%; The United States prohibits the use of DEHP in infant and toddler products.
Solvent and diluent:
Application: DEHP can be used as a solvent or diluent in certain chemical reactions or industrial processes.
Advantages: It has good solubility and stability, and can meet specific process requirements.
Environmental governance and restoration:
Application: Although DEHP itself is an environmental pollutant, researchers are exploring ways to use microbial degradation of DEHP to reduce its environmental impact.
Research progress: For example, a study by Tianjin University has found that marine bacteria Microbacterium esternomaticum DEHP -1 can degrade DEHP through monooxygenase, providing a new approach for environmental remediation.
We are the supplier of Diethylhexyl phthalate.
Remark: BLOOM TECH(Since 2008), ACHIEVE CHEM-TECH is the subsidiary of us.
The synthesis of di (2-ethylhexyl) phthalate mainly adopts the method of esterification, usually by reacting phthalic anhydride with 2-ethylhexyl alcohol under high temperature and catalyst conditions. The following are the detailed steps of this method and its corresponding chemical equations:
Preparation of raw materials: Firstly, prepare the required raw materials: phthalic anhydride, 2-ethylhexanol, and catalysts (such as sulfuric acid, phosphoric acid, or acidic ion exchange resin). Purify and dry phthalic anhydride and 2-ethylhexanol separately to ensure the quality of the raw materials.
Mixed raw materials: Mix the purified phthalic anhydride and 2-ethylhexanol in a certain proportion and add the catalyst. The function of the catalyst is to promote the esterification reaction and increase the reaction rate.
Heating reaction: Heat the mixture to a high temperature, usually between 150 ° C and 250 ° C. During the heating process, phthalic anhydride undergoes esterification reaction with 2-ethylhexanol to produce di (2-ethylhexyl) phthalate. Meanwhile, water will be produced as a byproduct.
Removing by-products: During the reaction process, it is necessary to promptly remove the by-product water to promote the reaction. Water can be removed by adding water absorbent or performing water separation operations.
Cooling and crystallization: When the reaction is approaching completion, cool the mixture to a lower temperature to allow the crystallization of di (2-ethylhexyl) phthalate to precipitate.
Filtration and drying: Separate the crystals of di (2-ethylhexyl) phthalate from the reaction mixture through filtration and perform drying treatment.
Purification: In order to obtain high-purity di (2-ethylhexyl) phthalate, purification operations such as recrystallization or distillation can be performed. The purified product needs to undergo quality testing to ensure compliance with relevant standards.
Chemical equation:
(C6H4)2CO + 2C8H18O → (C6H4COOCH2CH3)2 + 2H2O
This chemical equation represents the esterification reaction between phthalic anhydride and 2-ethylhexanol under the action of a catalyst, resulting in the formation of di (2-ethylhexyl) phthalate and water. The reaction is reversible, therefore it is necessary to remove water to promote the reaction in the direction of generating the target product.
Di (2-ethylhexyl) phthalate (DEHP) is a common plasticizer widely used in the manufacturing of plastics and rubber products. However, DEHP has relatively low stability in water and may undergo hydrolysis reactions.
The specific steps are as follows:
Prepare reagents and equipment: Prepare relevant reagents and equipment such as DEHP, water, pH meter, constant temperature water bath, separation funnel, etc.
Preparation of DEHP solution: Dissolve an appropriate amount of DEHP in water to prepare a certain concentration of DEHP solution.
Temperature control: Set the constant temperature water bath at a certain temperature, such as 40 ° C, to simulate temperature conditions in natural environments.
Monitoring pH: During the reaction process, use a pH meter to monitor changes in the pH of the solution.
Observation of hydrolysis phenomenon: Over time, DEHP undergoes hydrolysis reaction, producing DEMP. It can be observed that the solution gradually becomes turbid, as the generated DEMP dissolves in water.
Separation of products: The hydrolysis reaction solution is separated through a separating funnel, with a clear water layer on the upper layer and a DEMP oil layer on the lower layer.
Collection product: Collect the lower oil layer, which is the generated DEMP.
Purification product: In order to obtain high-purity Bis (2-ethylhexyl) phthalate, purification operations such as recrystallization or distillation can be performed on the product.
Chemical equation:
DEHP + H2O → C24H38O4 + other byproducts
This chemical equation represents the hydrolysis reaction of DEHP in water, generating DEMP and other byproducts. It should be noted that the reaction is reversible, so in practical operation, it is necessary to control the reaction conditions, such as temperature, pH value, etc., to promote the reaction towards the direction of generating the target product. Meanwhile, as the hydrolysis reaction is an equilibrium reaction, it is necessary to timely separate the generated DEMPE to break the equilibrium and promote the reaction to continue.
The invention provides two kinds of artificial immunogens of Diethylhexyl Phthalate and their preparation. The structural formula of the DEHP BSA is: the preparation method of the DEHP BSA is by coupling the DEHP hapten with the protein molecule BSA.
The preparation method of the immunogen has the advantages of simple preparation method, good stability, low cost and easy industrial production. The artificial immunogen DEHP-BSA of di (2-ethyl) hexyl phthalate was used to immunize animals to prepare specific antibodies, which laid the foundation for the establishment of avidin biotinylated enzyme-linked immunosorbent assay.
Hot Tags: diethylhexyl phthalate cas 117-81-7, suppliers, manufacturers, factory, wholesale, buy, price, bulk, for sale