Tri-n-butyl citrate (CAS 77-94-1), with molecular formula C ₁₈ H ₃₂ O ₇ and molecular weight 360.45 g/mol, has emerged as a multifunctional organic compound with broad industrial applications. This high-performance additive demonstrates exceptional properties that enhance product formulations across multiple sectors.

• Polymer Plasticizer: Tri-n-butyl citrate significantly improves the flexibility, ductility, and processability of polymer materials. By lowering the glass transition temperature, it maintains material elasticity across wider temperature ranges, making it valuable for plastic products, films, and wire/cable applications.
• Coatings and Inks Additive: In coating and ink formulations, it serves as an effective leveling and dispersing agent, promoting uniform pigment distribution while enhancing surface gloss and smoothness. Its excellent compatibility allows integration with various resin systems.
• Nitrocellulose Lacquer Enhancement: The compound substantially improves the flexibility, adhesion, and weather resistance of nitrocellulose lacquers, facilitating their use in wood coatings and leather finishing applications.
• Foam Control Agent: With outstanding defoaming properties, tri-n-butyl citrate effectively suppresses and eliminates process-generated foam in textile, paper, and food processing industries, ensuring production efficiency and product quality.
• Industrial Processing Aid: The chemical functions as a lubricant or release agent in various manufacturing processes to optimize production efficiency and output quality.
• Biopolymer Modification: When incorporated into zein (corn protein) films, tri-n-butyl citrate enhances mechanical properties, demonstrating potential for developing novel bio-based materials with improved processability.

Tri-n-butyl citrate exhibits several critical properties that contribute to its performance:

• High Purity: ≥99% purity ensures formulation stability and reliability
• Low Melting Point: -20°C maintains liquid state at low temperatures
• Density: 1.04 g/mL facilitates accurate measurement and blending
• High Boiling Point: 325°C prevents volatilization during high-temperature processing
• Flash Point: 157°C (315°F) ensures safe handling and storage
• Low Odor: Minimal scent impact on final products
• Refractive Index: 1.444 potentially relevant for optical applications
• Water Insolubility: Advantageous for waterproof coatings and sealants

The compound demonstrates incompatibility with strong oxidizing agents. Recommended storage at ambient temperature preserves optimal performance characteristics.