Overview
Tributyl Citrate (TBC) is a citrate ester synthesized from citric acid and n-butanol, primarily employed as a non-toxic plasticizer. It is favored in industries requiring low migration and high stability, such as food packaging and childcare products. TBC’s eco-friendly profile and compatibility with polymers like PVC have driven its adoption as a safer alternative to phthalates. As a biodegradable compound, TBC aligns with global regulatory trends restricting hazardous plasticizers. Its ester structure ensures minimal environmental impact, making it a sustainable choice for manufacturers targeting green certifications.
Physical and Chemical Properties
TBC is a clear, viscous liquid with a mild odor, stable under normal temperatures. Its low volatility (vapor pressure: <0.01 mmHg at 20°C) reduces emissions during processing, enhancing workplace safety. The ester’s hydrolytic stability prevents degradation in humid conditions, critical for long-term product performance. With a flash point of 185°C, TBC exhibits moderate flammability. Its solubility in alcohols, ethers, and ketones facilitates formulation flexibility, while insolubility in water simplifies handling. The density (1.042 g/cm³) and refractive index (1.443) are key for quality control in production.
Main Applications
TBC’s primary use is as a plasticizer in PVC films, cables, and synthetic leather, where it imparts flexibility without compromising durability. In food packaging, it complies with FDA 21 CFR regulations for indirect food contact, ensuring safety in cling films and bottle cap liners. The medical sector utilizes TBC in blood bags and tubing due to its non-toxicity and resistance to extraction by fluids. Additionally, it serves as a solvent in printing inks and a fixative in cosmetics, leveraging its low irritation potential.
Safety and Storage
TBC is classified as non-hazardous under GHS standards, with no carcinogenic or mutagenic effects reported. Standard PPE (gloves, goggles) is recommended during handling to prevent mild skin or eye irritation. Spills should be contained with inert absorbents and disposed of as non-hazardous waste. Storage requires airtight containers in well-ventilated areas, away from heat sources. Shelf life typically exceeds two years when stored below 30°C. Compatibility checks with storage materials (e.g., avoid polycarbonate) are advised to prevent container degradation.
B2B Procurement Guide
Bulk buyers should prioritize suppliers with ISO 9001 certification and batch-wise CoA (Certificate of Analysis) to ensure consistency in purity (≥99%) and acidity (≤0.1%). For food/medical grades, demand EU 10/2011 or USP-NF compliance documentation. Pricing varies by volume, with discounts common for orders exceeding 1 metric ton. Logistics considerations include drum (200kg) or IBC (1000kg) options; ensure temperature-controlled transport for prolonged shipments. Sample testing for viscosity (20-25 mPa·s at 25°C) and color (APHA ≤50) is recommended pre-purchase.
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