Monobutyl phthalate

Monobutylphthalate Structural Formula

Monobutyl phthalate (MBP) is a chemical compound that belongs to the group of phthalates, which are esters of phthalic acid. It is primarily used as a plasticizer in the production of plastics and rubber products to increase their flexibility. MBP is produced through the esterification of butanol with phthalic anhydride.

Properties

Monobutyl phthalate is a colorless, oily liquid that is soluble in organic solvents but has limited solubility in water. It has a molecular formula of C₁₂H₁₄O₄ and a molecular weight of 222.24 g/mol. The compound exhibits low volatility and has a boiling point of approximately 340°C.

Uses

The primary use of MBP is as a plasticizer in the manufacture of flexible PVC (polyvinyl chloride) products such as cables, hoses, and soft toys. It is also used in the production of adhesives, sealants, and as a solvent in the synthesis of other chemical compounds.

Health and Environmental Concerns

Monobutyl phthalate has been the subject of health and environmental concerns due to its classification as an endocrine disruptor. Studies have shown that exposure to MBP can lead to reproductive and developmental issues in both humans and wildlife. It can enter the human body through ingestion, inhalation, or dermal contact with products containing MBP.

Due to these concerns, the use of MBP in consumer products, especially those that come into direct contact with food or are intended for use by children, has been restricted in several countries. Regulatory agencies such as the European Chemicals Agency (ECHA) and the United States Environmental Protection Agency (EPA) have set guidelines and regulations to limit the exposure and release of MBP into the environment.

Regulation

In the European Union, MBP is subject to restrictions under the Registration, Evaluation, Authorisation, and Restriction of Chemicals (REACH) regulation. In the United States, the Consumer Product Safety Improvement Act (CPSIA) restricts the use of certain phthalates, including MBP, in children's toys and child care articles.

See Also

• Phthalates
• Plasticizer
• Endocrine disruptor
• Polyvinyl chloride (PVC)