The Science Behind STEOIL’s Crystal Plus® Mineral Oil Products

An inside look at the chemical purity, stability, and performance that make Crystal Plus® a trusted name. In industries where purity, consistency, and performance are non-negotiable, STEOIL’s Crystal Plus® mineral oil products have earned their place as trusted solutions. But what makes these oils stand out in a competitive market filled with white oils and technical-grade lubricants? The answer lies in the science. Let’s explore the key chemical properties and processes that power the performance behind Crystal Plus® Food-Grade and Tech-Grade Mineral Oils—and why they matter for your application.

Exceptional Purity, Backed by Chemistry

At the core of Crystal Plus® is its ultra-refined base: a highly stable, saturated hydrocarbon mixture derived from select petroleum feedstocks. Through advanced hydroprocessing techniques—including severe hydrotreating and hydrogenation—impurities like sulfur, nitrogen, and aromatic hydrocarbons are effectively removed. The result? A clear, odorless, and tasteless mineral oil that meets or exceeds the rigorous purity standards set by:

US FDA 21 CFR 178.3620(a) and (b)
US Pharmacopeia (USP)
National Formulary (NF)
NSF H1 and 3H Certifications for incidental food contact

This high degree of refinement is crucial in applications where contamination, oxidation, or reactivity can pose serious risks—such as food processing, pharmaceuticals, cosmetics, and electronics.

Molecular Stability = Long-Term Performance

The chemical structure of Crystal Plus® mineral oils is dominated by branched and cyclic paraffinic hydrocarbons, which contribute to their excellent oxidative stability. This means they resist breakdown over time—even under heat, pressure, or exposure to light—making them ideal for long-term use in sensitive or high-performance environments.

Whether used as a lubricant in food machinery, a processing aid in plastics, or a dielectric coolant in electrical systems, the thermal and chemical stability of Crystal Plus® reduces the risk of varnish formation, residue buildup, and product degradation.

Low Volatility and High Flash Points

Another standout property is the low volatility of Crystal Plus® mineral oils, which minimizes evaporative loss and odor in end-use applications. Combined with a high flash point, these characteristics enhance safety, especially in operations involving heat, open systems, or extended exposure to air.

Consistency You Can Count On

Because Crystal Plus® oils are refined using a highly controlled, multi-step process, their chemical composition remains consistent from batch to batch. That’s a key differentiator for customers who rely on tight formulation standards and process repeatability.

In technical and food-grade applications alike, this kind of consistency translates into fewer process disruptions, improved quality control, and peace of mind.

Applications Backed by Chemistry

The science behind Crystal Plus® directly supports its performance across a wide range of industries:

Food & Beverage – As a release agent, lubricant, or defoamer where purity and non-toxicity are essential
Plastics & Polymers – As a plasticizer or carrier fluid compatible with various formulations
Cosmetics & Personal Care – As a base or emollient that won’t oxidize or react with active ingredients
Electronics & Industrial Equipment – As a stable, non-conductive coolant or insulator

The STEOIL Advantage

While the chemistry is key, STEOIL’s commitment to quality, technical support, and on-time delivery ensures that customers get more than just a product—they get a reliable partner.

Whether you’re formulating a new product or improving an existing process, Crystal Plus® mineral oils deliver scientifically engineered performance that meets the highest standards of purity, stability, and reliability.

Discover the Crystal Plus® difference.

Learn more or request a sample today at steoil.com.