Tripropylene Glycol CAS 24800-44-0

Tripropylene Glycol (TPG) is a colorless, water-soluble, medium-viscosity liquid glycol. It is a mixture of isomers produced by the hydration of propylene oxide. TPG is distinguished by its low volatility, low toxicity, and excellent solvent power for a wide range of organic compounds.

Compared to lower molecular weight glycols (like MPG or DPG), TPG offers a higher boiling point and greater hydrophobicity. It is extensively used as a chemical intermediate for the synthesis of acrylates (TPGDA) in the radiation-curing industry and as a functional solvent in inks and lubricants.

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Our TPG is manufactured via a continuous process that ensures extremely low color and minimal aldehyde content, ensuring stability in UV-sensitive formulations.

Physicochemical Properties (Technical Data)

The following specifications represent our Standard Industrial/UV Grade, tailored for high-end synthesis and solvent applications.

Applications

Tripropylene Glycol is a versatile component in modern chemical formulations:

1. UV-Curing Industry (Primary Application):

• TPGDA Synthesis: TPG is the primary reactant used to produce Tripropylene Glycol Diacrylate (TPGDA), a reactive diluent used widely in UV-curable overprint varnishes, wood coatings, and inks due to its low viscosity and high reactivity.

2. Printing Inks & Paints:

• Solvent: Acts as a high-boiling solvent and coupling agent in printing inks (especially screen printing) to control drying time and improve flow.
• Latex Paints: Used as a coalescing aid to ensure smooth film formation.

3. Functional Fluids & Lubricants:

• Hydraulic Fluids: Serves as a base component or additive in hydraulic brake fluids.
• Metalworking: Used in cutting oils and grinding fluids due to its lubricity and stability.

4. Textile & Leather:

• Processing Aids: Used in the formulation of textile soaps and lubricants to reduce static and improve fiber handling.

Quality Assurance (QA/QC)

purity is paramount. Our TPG production is monitored under ISO 9001:2015 standards.

• Purity Verification: We utilize Gas Chromatography (GC) for every batch to ensure the purity exceeds 99.5% and to monitor the isomer distribution.
• Moisture Control: Since TPG is hygroscopic, we strictly control water content using Karl Fischer titration. Low moisture is critical for customers using TPG for esterification (TPGDA production) to prevent side reactions.
• Color Stability: We monitor the APHA color value to ensure the product is crystal clear ($\le 10$≤10 APHA), preventing discoloration in final clear-coat applications.

For lower-molecular-weight glycol supply, see Propylene Glycol.

Storage, Handling & Safety

Storage Conditions:

• Hygroscopic Nature: TPG readily absorbs moisture from the air. Tanks and drums must be kept tightly sealed.
• Inert Atmosphere: For long-term bulk storage, nitrogen blanketing is recommended to prevent oxidation (which can form aldehydes and increase acidity).
• Temperature: Store in a cool, dry place. The product is stable and does not freeze easily, but viscosity increases at low temperatures.

Safety Precautions (HSE):

• Toxicity: TPG is considered to have low acute toxicity, making it safer than Ethylene Glycol series products.
• Flammability: It has a high flash point (>140°C) but constitutes a Class IIIB combustible liquid. Keep away from open flames.
• PPE Recommendations:
  • Eyes: Wear safety glasses with side shields.
  • Skin: Wear chemical-resistant gloves (Nitrile/Neoprene) during transfer operations.
  • Ventilation: Ensure general ventilation is adequate.

Secure your supply of high-purity Tripropylene Glycol.

Whether for UV monomer synthesis or high-performance inks, we deliver global standards.

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