Chemical Identity and Physical Properties

Propylene glycol monomethyl ether acetate (PMA, also commonly designated PGMEA) carries the CAS registry number 108-65-6. It is the acetic acid ester of propylene glycol monomethyl ether and belongs to the glycol ether acetate family of solvents. The molecule contains both an ether linkage and an ester group, endowing it with broad solvency across polar and moderately nonpolar solutes.

Key physical characteristics include a colorless, clear liquid appearance with a mild, fruity–ester odor. Its relatively high boiling point (reported in literature as approximately 146 °C at atmospheric pressure) and moderate vapor pressure contribute to a slow evaporation rate that is advantageous in applications requiring extended open time, such as spray coatings and photoresist spin-coating. The flash point is typically reported in the range of 42–47 °C (closed cup), classifying PMA as a flammable liquid under standard regulatory frameworks.

PMA is miscible with a broad range of organic solvents including alcohols, ketones, esters, aromatic hydrocarbons, and aliphatic hydrocarbons. Its water miscibility is limited, which distinguishes it from its parent ether (propylene glycol monomethyl ether, PM) and makes it favorable in formulations where moisture sensitivity is a concern.

Review note: Specific boiling point, flash point, density, and refractive index values for the Aladdin P1522454 lot specification should be confirmed from the product certificate of analysis before publication.

Applications in Research and Industry

Semiconductor and Microelectronics Processing: PMA (PGMEA) is one of the most widely used solvents in photolithography. It is the primary solvent and rinse agent for positive and negative photoresists used in integrated circuit fabrication, flat-panel display manufacturing, and printed circuit board production. Its slow evaporation rate allows uniform film formation during spin-coating, while its excellent solvency for resin-based resist formulations ensures complete dissolution and consistent film thickness.

Coatings, Inks, and Adhesives: In the coatings industry, PMA serves as a high-boiling coalescing solvent and diluent for alkyd, polyurethane, epoxy, and acrylic resin systems. It improves flow, leveling, and film formation. In gravure and flexographic printing inks, PMA contributes to viscosity control and drying profile adjustment. Adhesive formulators use it to dissolve polymeric binders and control tack and open time.

Cleaning and Surface Preparation: PMA is employed as a precision cleaning agent for removal of flux residues, photoresist residues, and organic contaminants from electronic components and optical substrates. Its combination of solvency power and controlled evaporation makes it suitable for both immersion and vapor-degreasing-style cleaning protocols.

Laboratory Research: As a research reagent supplied by Aladdin Scientific (SKU P1522454), PMA is used as a reaction solvent, formulation vehicle, and reference standard in studies involving polymer science, materials science, and organic synthesis where a high-boiling, relatively low-toxicity ester–ether solvent is required.

Safety, Handling, and Regulatory Considerations

Toxicology Profile: PMA is generally regarded as having a more favorable toxicological profile compared to ethylene glycol ethers. It is not classified as a reproductive toxicant in the manner that ethylene glycol monomethyl ether is. However, as with all organic solvents, prolonged or repeated dermal contact, inhalation of vapors above occupational exposure limits, and ingestion must be avoided. Users should consult the current Safety Data Sheet (SDS) for detailed hazard classification, exposure limits, and first-aid measures before use.

Flammability: PMA is classified as a flammable liquid (flash point approximately 42–47 °C, closed cup). It must be stored away from ignition sources, in tightly sealed containers in a cool, well-ventilated area compliant with flammable solvent storage regulations. Grounding and bonding procedures should be followed when transferring bulk quantities.

Personal Protective Equipment (PPE): Chemical-resistant gloves (nitrile or equivalent), safety goggles, and lab coat are recommended during handling. Where vapor concentrations may exceed occupational exposure limits, appropriate respiratory protection should be used. Work should be performed in a fume hood or adequately ventilated enclosure.

Waste Disposal: PMA-containing waste must be disposed of in accordance with applicable local, national, and international regulations for flammable organic solvent waste. Do not pour down drains or into the environment.

Review note: Specific regulatory classifications (GHS/CLP pictograms, H and P statements, OSHA PEL, ACGIH TLV) should be verified against the current Aladdin SDS for P1522454 prior to publication.

Purity, Grades, and Aladdin Product Specification

Research-grade PMA supplied by Aladdin Scientific (SKU: P1522454) is intended for laboratory and research use. Purity and specification details—including assay percentage, water content, acidity, and specific gravity—are documented in the product's Certificate of Analysis (CoA) and should be consulted to confirm suitability for a given application.

Common purity grades available commercially for PMA range from technical grade (suitable for industrial formulations) to high-purity electronic/semiconductor grade (meeting stringent metal ion and particle specifications required for photolithography). Buyers involved in semiconductor processing or photoresist formulation should confirm that the supplied grade meets applicable SEMI or equivalent standards for trace metal and particle contamination.

For procurement inquiries, custom packaging, bulk quantities, or specific purity requirements for P1522454, researchers and lab managers are encouraged to contact Aladdin Scientific's technical sales team directly.

Review note: Exact assay value (e.g., ≥99.0%), specific gravity, refractive index, and other lot-specific parameters for P1522454 must be sourced from the actual product listing or CoA and inserted here before publication. SEMI grade compliance should be verified if claimed.