In the competitive landscape of chemical manufacturing, understanding the intrinsic properties and advantages of a product is key to its successful application and market adoption. Dioctyl Terephthalate (DOTP), a non-phthalate plasticizer with CAS number 6422-86-2, exemplifies this principle. Its unique chemical structure and resulting properties make it a highly sought-after additive, particularly as industries move away from regulated phthalates. NINGBO INNO PHARMCHEM CO.,LTD., a prominent chemical supplier, highlights the fundamental attributes that define DOTP's value.

Chemical Structure and Synthesis of DOTP

DOTP is the diester of terephthalic acid and 2-ethylhexanol. Its molecular formula is C24H38O4. The synthesis typically involves the esterification of terephthalic acid with 2-ethylhexanol. This process results in a molecule with a more symmetrical and stable structure compared to ortho-phthalates. This structural difference is the root cause of many of its superior properties, including higher thermal stability and a better toxicological profile.

Key Chemical and Physical Properties of DOTP

Understanding DOTP's key properties is essential for formulation scientists and engineers:

  • Appearance: A clear, colorless, viscous liquid. This visual characteristic is important for applications where clarity and aesthetics are paramount.
  • Molecular Weight: Approximately 390.56 g/mol. This contributes to its low volatility.
  • Density: Typically around 0.986 g/mL at 25°C. This is a standard parameter for material calculations and handling.
  • Boiling Point: Around 400°C (lit.). This high boiling point signifies its thermal stability.
  • Flash Point: Generally above 210°C (closed cup). A high flash point indicates reduced flammability and greater safety during handling and processing.
  • Melting Point: Reported values vary, but it remains liquid at typical room temperatures, with some sources citing around -48°C, indicating good low-temperature performance.
  • Solubility: It is insoluble in water but soluble in many organic solvents, a common characteristic for plasticizers.
  • Acidity: Low acidity levels (e.g., <0.02% calculated as phthalic acid) are indicative of product purity and stability.
  • Volume Resistivity: High volume resistivity is a critical property for electrical insulation applications.

Distinct Advantages of DOTP as a Plasticizer

These properties translate into tangible advantages for users:

  • Non-Phthalate Status: The most significant advantage is its absence of phthalates, making it compliant with stringent regulations and preferred for sensitive applications. This directly addresses concerns about health and environmental impact.
  • High Thermal Stability: DOTP can withstand higher processing temperatures than many conventional plasticizers without significant degradation, ensuring product integrity during manufacturing and in end-use.
  • Low Volatility: Its low vapor pressure means it is less likely to evaporate from the plastic matrix, leading to more permanent plasticization, extended product life, and reduced emissions.
  • Good Electrical Properties: Its high volume resistivity makes it an excellent choice for electrical insulation, a key factor in the wire and cable industry.
  • Excellent Plasticizing Efficiency: DOTP effectively softens PVC and other polymers, often requiring lower loading levels to achieve the desired flexibility, which can translate to cost savings.

Sourcing High-Quality DOTP from NINGBO INNO PHARMCHEM CO.,LTD.

For businesses seeking to leverage these advantages, sourcing high-quality DOTP is paramount. NINGBO INNO PHARMCHEM CO.,LTD. stands as a reliable DOTP supplier in China. We offer premium-grade Dioctyl Terephthalate, ensuring purity and consistency for all your formulation needs. As a dedicated DOTP manufacturer, we are committed to providing competitive DOTP plasticizer prices and a stable supply chain. If you are looking to buy DOTP and benefit from its superior chemical properties, contact us today.

Our team is ready to provide you with detailed technical data, safety information, and a competitive quote. Partner with us for your chemical sourcing needs and experience the difference that quality and reliability make.