Alexei Volkov
Dibutyl phthalate (DBP) is a man-made chemical compound commonly used as a plasticizer due to its low toxicity and wide liquid range. It is added to plastics and other materials to enhance their flexibility and softness. DBP is produced by the reaction of n-butanol with phthalic anhydride and is an important plasticizer for engineering plastics such as PVC. While DBP has been widely used in various consumer products, there are also concerns about its potential health and environmental impacts, leading to restrictions and bans in certain applications, such as children's toys.
| Characteristics | Values |
|---|---|
| Chemical formula | C6H4(CO2C4H9)2 |
| State | Viscous liquid |
| Colour | Colourless, but commercial samples may be yellow |
| Dielectric constant | High |
| Producers in the EU | 3 |
| EU production (1998) | 26,000 tonnes |
| Primary uses | Softening and increasing flexibility of plastics, e.g. in shower curtains, raincoats, food wraps, and car interiors |
| Other uses | Elastomers, lacquers, explosives, printing inks, resin solvents, perfume oil solvents, paper coatings, adhesives, nail polish, solid rocket propellants, perfume fixative, textile lubricating agent, safety glass additive |
| Banned in | Cosmetics in the EU, children's toys |
| Specific gravity | 1.23 |
| Wallace plasticity | 30 |
| Mooney scorch time (MS 1+ 3) at 120°C | 18 minutes |
| Tensile strength | 135 kg/cm2 |
| Ultimate elongation | 560% |
| Modulus at 300% elongation | 90 kg/cm2 |
| Shore hardness | 70°A |
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What You'll Learn
Dibutyl phthalate (DBP) is an organic compound of phthalate
DBP is an important plasticizer that enhances the utility of some major engineering plastics, such as PVC. It is used to soften and increase the flexibility of plastics, for example, in shower curtains, raincoats, food wraps, and car interiors. It is also used in printing inks, adhesives, and other industrial applications.
DBP has been widely used in plumbing for carrying sewage and other corrosive materials. However, it is also considered an endocrine disruptor and is suspected of causing developmental effects. As a result, its use has been restricted, especially in products for children, such as toys.
In addition to its use as a plasticizer, DBP has been used in consumer products such as nail polish, cosmetics, perfumes, and insect repellents. It also has applications in laboratory research. However, due to safety concerns, its usage has declined since around 2006, and it is now subject to regulatory limits and bans in certain jurisdictions, such as the European Union and the United States.
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DBP is used as a plasticizer in polymers
Dibutyl phthalate (DBP) is a man-made chemical commonly used as a plasticizer in polymers. It is an organic compound of phthalate with a chemical formula of C6H4(CO2C4H9)2 or C16H22O4, depending on the source. DBP is produced by the reaction of n-butanol with phthalic anhydride or isobutanol, which are the co-products of 2-ethylhexanol manufacturing. It is a colourless oil, although commercial samples may appear yellow due to impurities.
According to 1997 data, around 75-76% of DBP is used as a plasticizer in polymers, with smaller amounts used in adhesives, printing inks, and miscellaneous applications. Its use in polymers has been declining since the 1990s, and it is now banned in certain products such as children's toys in the European Union and the United States due to health and environmental concerns.
Despite these restrictions, DBP is still found in many everyday products. In addition to its use as a plasticizer, DBP is also used in paints, lacquers, sealants, grouting agents, cosmetics, and other consumer products. However, there are ongoing efforts to find alternative plasticizers with similar effectiveness but lower environmental impact.
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It helps keep plastics soft and flexible
Dibutyl phthalate (DBP) is a man-made chemical commonly used as a plasticizer—a substance that keeps plastics soft and flexible. It is added to plastics and other materials to enhance their utility. DBP is an organic compound of phthalate, with a chemical formula of C6H4(CO2C4H9)2, and exists as a colorless oil.
As a plasticizer, DBP is particularly important for enhancing the utility of major engineering plastics such as PVC. This modified PVC is widely used in plumbing for carrying sewage and other corrosive materials. DBP is also used as a plasticizer in polymers, with over 75% of its production being utilized for this purpose.
The flexibility and softness that DBP imparts to plastics are advantageous for various applications. For example, it is used in shower curtains, raincoats, food wraps, and car interiors. The ability of DBP to maintain the softness and flexibility of plastics is attributed to its chemical structure and physical properties, such as its low vapour pressure, which prevents it from evaporating readily.
In addition to its plasticizing properties, DBP has a wide range of other uses. It is utilized in adhesives, printing inks, sealants, grouting agents, and construction materials. DBP also finds applications in consumer products, such as cosmetics, nail polish, perfume oil solvents, and paper coatings. However, due to potential health concerns, the use of DBP in certain consumer products, such as cosmetics and children's toys, has been restricted or banned in some regions.
While DBP has been a valuable plasticizer, there are ongoing efforts to find alternative plasticizers that offer similar benefits without the associated health and environmental concerns. This includes exploring biodegradable options that are less persistent in the environment.
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DBP is produced by the reaction of n-butanol with phthalic anhydride
Dibutyl phthalate (DBP) is an organic compound of phthalate commonly used as a plasticizer. It is produced by the reaction of n-butanol with phthalic anhydride. This reaction is catalysed by concentrated sulphuric acid, and the excess alcohol is recovered and recycled. The di-n-butyl phthalate is then purified by vacuum distillation and/or activated charcoal.
DBP is a colourless oil, although commercial samples often appear yellow due to impurities. It has a low vapour pressure of 2.67 x 10^-3 Pa, which means it does not evaporate easily. This property makes it useful as a plasticizer. DBP also has a high dielectric constant and a wide liquid range.
As a plasticizer, DBP is incorporated into plastics to increase their workability and distendability. It is particularly useful for enhancing the utility of major engineering plastics like PVC. Modified PVC with DBP is widely used in plumbing to carry sewage and other corrosive materials.
DBP is also used in a variety of other applications, including adhesives, printing inks, sealants, grouting agents, coatings, explosives, lacquers, resins, perfumes, paper, and cosmetics. It has been found in consumer products like nail polish, but its use has declined since around 2006 due to health concerns. DBP is considered an endocrine disruptor and is banned in the European Union for use in cosmetics and children's toys.
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It is regarded as an endocrine disruptor
Dibutyl phthalate (DBP) is a man-made chemical commonly added to plastics and other materials. It is used as a plasticizer, helping to keep plastics soft and flexible. DBP is produced by the reaction of n-butanol with phthalic anhydride and has a chemical formula of C6H4(CO2C4H9)2.
DBP is regarded as an endocrine disruptor, which means it can interfere with the normal functioning of the endocrine system. The endocrine system is responsible for producing and regulating hormones, which are crucial for various bodily functions, including reproduction, metabolism, and growth and development. Endocrine disruptors, like DBP, can mimic or block hormones, altering the normal balance and leading to potential health issues.
Research has shown that DBP may affect reproductive health, particularly in males. Studies in animals, such as rodents and zebrafish, have found that exposure to DBP can impact reproductive-related outcomes. It has been associated with decreased reproductive organ weight, affecting the testis and seminal vesicle, and impaired spermatogenesis. These effects have also been observed in humans, with studies finding DBP and its metabolite, monobutyl phthalate (MBP), present in urine samples of adult populations.
The impact of DBP on the endocrine system has raised health concerns, especially for children. Children are more vulnerable to the effects of endocrine disruptors due to their developing bodies and sensitive growth stages. As a result, many countries have implemented restrictions on the use of DBP in products that may come into contact with children, such as banning its use in children's toys and limiting its presence in consumer products like nail polish.
While the precise role of DBP in the reproductive system and its overall endocrine-disrupting effects are still being studied, the potential risks have led to a decline in its use in various industries. The scientific community and the public are increasingly concerned about the presence of DBP in the environment, particularly in food, water, and ecological systems.
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Frequently asked questions
It is an organic compound of phthalate commonly used as a plasticizer because of its low toxicity and wide liquid range.
Dibutyl phthalate is added to plastics to act as a plasticizer, helping to keep them soft and flexible.
Dibutyl phthalate is used in polymers such as PVC, adhesives, printing inks, sealants, grouting agents, cosmetics, and consumer products such as nail polish. It is also used in shower curtains, raincoats, food wraps, and car interiors.
Dibutyl phthalate is considered to have low toxicity. However, it is listed as a suspected teratogen and endocrine disruptor. It is banned in the European Union for use in cosmetics and children's toys.
