Isononanoic Acid, 26896-18-4, Tert-Nonanoic Acid, 7-Methyloctanoic Acid, 3302-10-1

📌 Isononanoic Acid

1. Identity

• English Name: Isononanoic Acid

• Turkish Name: İsononanoik Asit

• CAS Numbers: 26896-18-4 / 3302-10-1

• EC Number: 248-092-3

• Molecular Formula: C9H18O2

• Molecular Weight: 158.24 g/mol

• Synonyms:

  • 7-Methyloctanoic acid

  • 3,5,5-Trimethylhexanoic acid

  • tert-Nonanoic acid

  • Iso-nonanoic acid

  • INA / IN Acid (commercial abbreviations)

  • Isononansäure (DE), Acide Isononanoïque (FR), Ácido Isononanoico (ES)

2. Physical & Chemical Properties

• Appearance: Colorless to pale yellow liquid

• Odor: Mild characteristic

• Density: ~0.89 g/cm³ (20 °C)

• Boiling Point: ~250 °C

• pKa: ~4.9 (moderate carboxylic acid strength)

• Solubility: Limited in water, soluble in organic solvents

• Thermal Stability: Stable above 200 °C in polymer systems

• Production Route: Oxidation of isononyl aldehyde

3. Functional Characteristics

• Branched-chain structure → low yellowing tendency

• Enhances stability and performance in alkyd resins

• Provides thermal oxidative resistance in polyolester lubricants

• Acts as emulsifier/stabilizer in cosmetic formulations

• Improves flexibility and processability in plastics and coatings

4. Applications in Product Manufacturing

• Polyolester Synthetic Lubricants → compressor oils, motor oils, heat transfer fluids (mandatory)

• Alkyd Resins → industrial paints, stoving enamels, automotive coatings (mandatory)

• Metal Soaps (Driers) → calcium, zinc, cobalt salts for paints and varnishes (mandatory)

• Cosmetic Emulsions → creams, lotions (optional)

• Plastic Additives → plasticizers, polymer modifiers (optional)

5. Sectoral Compatibility

6. Market & Supply Information

• Packaging: 200 kg drums, 1000 kg IBCs, bulk tankers

• MOQ: 200 kg (drum)

• Storage: Cool, dry, well-ventilated area; avoid direct sunlight

• Logistics: Not classified under ADR → easier transport

• Market Trends: Stable demand in Europe/US/Japan; rapid growth in China

7. Safety & Regulatory

• MSDS: Skin/eye irritation risk → PPE required

• Hazard Class: Low hazard profile

• REACH compliant

• FDA accepted for cosmetic applications

• Sustainability: Low VOC contribution, suitable for eco-friendly formulations

🔬 Alternatives to Isononanoic Acid

1. Branched-Chain Carboxylic Acids

• Isovaleric Acid (C5) → Used in flavorings, coatings, and specialty esters.

• Pentanoic Acid (Valeric Acid) → Applied in lubricants and plasticizers.

• Straight-Chain Nonanoic Acid → Similar chain length but less stable; higher yellowing tendency compared to branched isononanoic acid.

2. Esters of Isononanoic Acid

• Isononyl Isononanoate → Cosmetic emollient ester, provides soft non-greasy feel, improves skin hydration.

• Other Isononyl Esters → Used in lubricants and coatings for flexibility and stability.

3. Functional Alternatives in Applications

• Lubricants:

  • Alternatives include adipic acid esters, sebacic acid esters, and phthalates (though less eco-friendly).

• Coatings:

  • Alternatives are straight-chain fatty acids (nonanoic, decanoic), but they cause more yellowing.

• Cosmetics:

  • Alternatives include esters like isopropyl myristate, caprylic/capric triglycerides, and volatile silicones.

📊 Comparison Table