Propylene Glycol (PG)

Royalchem supplies Propylene Glycol (PG / MPG), CAS 57-55-6, with assay ≥99.50%. This water-miscible diol is used as a raw material for unsaturated polyester resins, an industrial solvent and a component of heat transfer and antifreeze formulations. Send your application, quantity, packaging preference and destination for a quotation.

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Model:
PG, assay ≥99.50%
Brand:
Royalchem
Code:
57-55-6

Product Description

Product Name	Propylene Glycol (PG / MPG) Also known as 1,2-Propanediol and Monopropylene Glycol.
CAS No.	57-55-6
Molecular Formula & Weight	C₃H₈O₂ \| 76.09 g/mol
Chemical Structure
Product Overview	Propylene glycol is a clear, colorless, slightly viscous liquid. It is hygroscopic and miscible with water. Its two hydroxyl groups make it useful as a reactive raw material in resin production, while its solvent properties support a range of industrial formulations.
Specification	Assay: ≥99.50% Typical appearance: clear, colorless liquid. Confirm additional limits for water, color, acidity and impurities, together with test methods, in the agreed specification and batch Certificate of Analysis (COA).
Key Applications	Unsaturated polyester resins (UPR): Glycol raw material for resin synthesis. Coatings and industrial formulations: Solvent, coupling agent or alkyd resin raw material, depending on formulation. Heat transfer and antifreeze fluids: Base component for formulated fluids, with concentration, inhibitors and equipment compatibility selected for the operating conditions. Liquid detergents and agrochemical adjuvants: Solvent or carrier in suitable formulations.
Packaging & Storage	Specify your preferred packaging, net weight and container material when requesting a quotation. Final packing is confirmed with the order. Keep containers tightly closed in a cool, dry, well-ventilated area. Protect from moisture and contamination and follow the applicable Safety Data Sheet (SDS).

Request a Propylene Glycol Quotation

Royalchem supplies Propylene Glycol, CAS 57-55-6, assay ≥99.50%. Share your application, quality requirements, quantity and destination so we can review your sourcing request. Contact Royalchem for specifications and a quotation.

Propylene Glycol FAQ

Are PG and MPG the same product?	In this listing, PG and MPG both refer to propylene glycol, also called monopropylene glycol or 1,2-propanediol, CAS 57-55-6. Always use the CAS number when matching procurement specifications.
What purity does Royalchem offer on this page?	The stated assay is ≥99.50%. For purchasing approval, request the proposed specification and batch COA and confirm your limits for water, color, acidity and other relevant impurities.
Does ≥99.50% assay establish food or pharmaceutical grade?	No. Assay alone does not establish USP/EP or food-grade compliance. Such applications require the appropriate grade, impurity controls and supporting documentation for the intended use and destination market. This listing makes no USP/EP or food-grade claim.
Can this PG be used directly as a finished antifreeze?	PG is a formulation raw material. A finished heat transfer or antifreeze fluid requires the appropriate dilution, inhibitor system and compatibility assessment. Validate performance for your equipment and operating temperature range.
How can buyers in Europe, North America or South America request a quotation?	Provide the application, required quantity, delivery schedule, packaging preference and destination country or port. Include any quality, documentation or import requirements. Price, minimum order quantity, availability and delivery terms are confirmed in the quotation.
How should propylene glycol be stored?	PG can absorb moisture from the air. Keep containers tightly sealed and protect the material from water ingress and contamination. Consult the applicable SDS and batch-specific storage guidance before handling.