Propylene glycol phenylate appears as a chemical compound formed by the reaction of propylene glycol and phenol, creating a molecule carrying both hydrophobic and hydrophilic properties. The formula is C9H12O2, reflecting its combined phenyl and glycol functionalities. In daily practice, raw materials such as phenol and propylene glycol undergo esterification, resulting in this commercial-grade intermediate. Many professionals in the field know it as a versatile compound that adapts to various application needs, especially when precise solubility and compatibility with polymers or resins matter.
The compound features one phenyl group linked to propylene glycol, giving it unique physical and chemical interactions compared to simple glycols or straight phenols. Its molecular weight stands at 152.19 g/mol. The structure supports both liquid and solid states under different temperatures. Propylene glycol phenylate commonly looks like white flakes, pearls, and sometimes appears as a powder or a semi-solid mass under lab conditions. In the liquid state, it offers clear or slightly hazy solutions. The dual polar-apolar structure enables it to dissolve in alcohols, esters, and sometimes in water, depending on concentration and form. Material density typically reaches between 1.07 g/cm³ and 1.11 g/cm³ at 20°C, providing a degree of reliability in blending operations or when calculating volumes per liter for large batches. Thermally, it resists breakdown at moderate temperatures used in most industrial applications.
Quality grades differ based on purity and form. High-grade material registers minimal impurities, usually guaranteed at 99% purity or higher, as confirmed by gas chromatography data in most certificates of analysis. Flake and solid forms deliver reliable results in applications where controlled melting points benefit processing. Pearls or beads allow easier handling, especially in automated systems feeding batch reactors. The powder form suits processes needing rapid dissolution or fine blending. Visual examination yields little color, and high-purity grades do not impart unwanted haze or residue to finished goods.
For transport and customs documentation, propylene glycol phenylate usually falls under the Harmonized System Code 290949, reserved for ether-alcohols and their derivatives. This categorization aligns with global trade requirements and helps streamline logistics or comply with regulatory audits. Safety remains a core issue in daily industrial use. Material safety data sheets describe this chemical as potentially irritating to the skin or eyes, especially when handled without gloves or goggles. Vapors rarely pose an acute risk under normal room conditions, but processes generating fine powders or mists call for local extraction and good room ventilation. It does not burn easily, which reduces fire risk during storage, though bulk handling still demands grounded containers and proper spill management. Chronic exposure could lead to mild respiratory complaints in sensitive individuals, and direct ingestion carries harmful effects. Companies instruct workers to avoid all oral contact and to wash thoroughly after exposure. While label requirements vary, shipments usually carry marks for mild hazardous potential, in line with GHS and UN classification systems.
This chemical slips into roles in plastics, resins, adhesives, and specialty surface coatings, delivering resonance and stability to product matrices. It’s prized as an intermediate, both as a raw material and as a reactive diluent. Polymer producers incorporate it to improve compatibility between otherwise immiscible ingredients. In adhesives, the blend assists with tackiness and flexibility, acting as a plasticizer or softener. The flavor and fragrance industry sometimes applies trace levels in synthesis steps, but never for direct consumption or formulation into food products due to toxicity in significant doses. Professionals working with solution chemistry rely on the predictable density and melt characteristics to map out formula adjustments, as outcomes stay stable across multiple production runs. Propylene glycol phenylate resists photolytic breakdown better than simple glycols, supporting longevity in exposed plastic applications.
Solid or powder forms demand dry, tightly sealed storage to prevent clumping or unwanted hydrolysis, as moisture reduces efficiency in end applications. Bulk liquid shipments arrive in lined drums or IBCs, providing protection against accidental cross-reactions. Effluent containing even low percentages should route through approved chemical treatment systems, given the harmful effect on aquatic life at high concentrations. Current data suggest biodegradation occurs slowly, so environmental releases stay tightly regulated in most jurisdictions. Safe handling, PPE, and strict adherence to local chemical storage codes help protect workers and minimize unforeseen incidents. Many facilities implement secondary containment for warehouses, ensuring bulk supplies pose no risk to soil or water tables in the event of a containment failure.
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