Solvents

Water

Water, especially purified water and water for injection (WFI), is the primary solvent used in pharmaceuticals due to its safety and broad compatibility. Purified water is suitable for oral and topical products, while WFI meets stringent microbial limits required for injectables.

Alcohols

Alcohols such as ethanol and isopropyl alcohol serve as effective solvents for hydrophobic or semi-polar active ingredients, playing an important role in both formulation and manufacturing. Ethanol is commonly used in oral solutions, tinctures, and topical preparations due to its strong solubilization ability and antimicrobial properties, while isopropyl alcohol is primarily reserved for external applications, disinfection, and processing steps.

Polyols

Polyols, including propylene glycol (PG), glycerin, and various grades of polyethylene glycol (PEG), are versatile pharmaceutical solvents valued for their low toxicity, strong solubilizing ability, and excellent safety record. These semi-polar solvents are widely used in oral liquids, injectables, topical gels, and suppositories, where they improve viscosity, stabilize sensitive APIs, and act as humectants.

Esters

Ester solvents such as ethyl acetate and butyl acetate are primarily processing solvents used in coating, crystallization, and purification. Their favorable solvency and rapid evaporation support efficient tablet-coating operations and help achieve desired crystal forms of APIs. Although not commonly used directly in finished dosage forms, they play an important role in manufacturing steps that influence product quality.

Hydrocarbons

Hydrocarbons like hexane, heptane, and mineral oil are applied in extraction, and specific formulation needs. Hexane and heptane assist in API purification and crystallization due to their low polarity, while mineral oil serves as both solvent and emollient in topical preparations. Strict residual limits apply, but hydrocarbons remain valuable in processes that require selective solvation or moisturizing functionality.

Ethers

Ethers such as propylene glycol monomethyl ether (PM) and diethylene glycol monoethyl ether provide strong solubilizing capability and excellent membrane penetration, making them suitable for transdermal, dermal, and some injectable applications. Their compatibility with various APIs and polymers supports improved bioavailability and flexible formulation design. Ethers are increasingly used in advanced dosage forms requiring efficient drug delivery through the skin or tissues.

At our company, we supply a comprehensive portfolio of high-purity pharmaceutical solvents designed to meet the most rigorous international standards. Our selection includes water-based solvents, alcohols, polyols, esters, ketones, and specialized penetration-enhancing solvents; all produced under strict quality control systems compliant with pharmacopeial requirements. With consistent quality, reliable supply, and technical expertise, we provide formulation-ready solvents that support oral, injectable, topical, and advanced drug-delivery applications. Our commitment to purity, safety, and innovation ensures that customers receive solvent excipients that meet both performance and regulatory expectations.

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