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Diisodecyl Phthalate, Bisisodecyl Phthalate, DIDP, 26761-40-0

Diisodecyl Phthalate, Bisisodecyl Phthalate, DIDP, 26761-40-0

Diisodecyl Phthalate (DIDP) is a commonly used plasticizer in the polymer industry. DIDP is a mixture of compounds obtained by esterifying phthalic acid with isomeric decyl alcohols. It is used to increase the flexibility of plastics and plastic coatings.

Properties:

  • Chemical Formula: C28H46O4

  • Molecular Weight: 446.672 g/mol

  • Density: 0.96-0.97 g/cm³ (at 20°C)

  • Melting Point: -50°C

  • Boiling Point: 250-257°C (at 0.5 kPa)

Applications:

  • Coatings: Furniture, kitchenware, pharmaceutical tablets, food packaging

  • Automotive: Interior upholstery, cables, and wires

  • PVC Products: Flexible PVC products, sealants, mastic applications

DIDP is preferred in applications requiring resistance to high temperatures and low fogging. It is also known for its low volatility and good insulation properties.

Diisodecyl Phthalate (DIDP) is also known by several other names:

  • Bis(8-methylnonyl) benzene-1,2-dicarboxylate

  • Bis(8-methylnonyl) phthalate

  • Bis(isodecyl) phthalate

  • DIDP

  • 26761-40-0 (CAS number)

These names are used interchangeably in various industries and applications

In everyday language, Diisodecyl Phthalate (DIDP) is often referred to as a "plastic softener" or "plasticizer." These terms are used to describe chemicals that make plastics more flexible and durable. DIDP is commonly used in products like flexible PVC, car interiors, and various coatings to enhance their flexibility and longevity.

 

Comparison of Five Phthalates

Property DMP (Dimethyl) DEP (Diethyl) DBP (Dibutyl) DOP/DEHP (Dioctyl) DIDP (Diisodecyl)
Formula C10H10O4 C12H14O4 C16H22O4 C24H38O4 C28H46O4
Molecular Weight ~194 g/mol ~222 g/mol ~278 g/mol ~390 g/mol ~446 g/mol
Boiling Point ~282 °C ~298 °C ~340 °C ~385 °C >400 °C
Volatility High Medium Low Very low Very low
Solubility Slightly soluble in water Low solubility in water Insoluble in water Insoluble in water Insoluble in water
Main Applications Insect repellents, specialty polymers Cosmetics, perfumes, cellulose acetate plastics PVC, adhesives, rubber PVC, vinyl flooring, cable insulation Automotive parts, high-temp cables, durable PVC
Toxicological Profile Relatively low Low Endocrine disruptor risk Environmental concerns, restricted in EU Safer profile, low migration
Usage Share (out of 100 units) 🔵 8% 🔵 12% 🔵 15% 🔵 40% 🔵 25%

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