What Is Paraffin Wax? Understanding the Most Common Candle Wax

If you've ever picked up a commercially made candle, chances are it was made with paraffin wax.

In fact, paraffin has been the most widely used candle wax for decades because it's affordable, readily available, and holds both fragrance and color exceptionally well.

But as consumers become more interested in ingredient transparency, many are beginning to ask a simple question:

Where Does Paraffin Wax Come From?

Paraffin wax is a byproduct of the petroleum refining process. During crude oil refinement, heavier oil fractions are separated and further processed to produce paraffin wax, which is then purified for commercial use.

Crude oil is a complex mixture of thousands of hydrocarbons. At a petroleum refinery, it's heated and separated into different fractions based on boiling point in a process called fractional distillation.

Some fractions become:

• gasoline

• diesel fuel

• jet fuel

• lubricating oils

• asphalt

• wax-containing lubricating oil fractions

  
  

Paraffin wax comes from these heavier lubricating oil fractions—not directly from crude oil itself.

Step 2: Wax Is Separated

The lubricating oil fraction contains both oil and wax crystals. As the mixture is cooled, the wax crystallizes.

Refineries then separate the wax from the oil using processes such as:

• chilling

• filtration

• centrifugation

• solvent dewaxing (often using solvents like methyl ethyl ketone (MEK) and toluene during processing)

  
  

At this point, the material is called slack wax, which still contains a significant amount of oil.

Step 3: Refining (Purification)

Slack wax undergoes additional refining to remove:

• residual oils

• color compounds

• sulfur compounds

• nitrogen-containing compounds

• aromatic hydrocarbons

• odor-causing impurities

  
  

Purification methods can include:

• sweating (controlled melting to separate higher-quality wax)

• solvent treatment

• hydrofinishing or hydrotreating (using hydrogen under pressure with catalysts to remove impurities)

• clay filtration or adsorption

  
  

The goal is to produce a cleaner, whiter, more odorless wax.

Step 4: Fully Refined Paraffin Wax

The finished paraffin wax used in candles is typically:

• white

• nearly odorless

• food-grade in some applications

• highly refined

• composed primarily of straight-chain saturated hydrocarbons (alkanes)

It's also used in:

• food packaging

• cheese coatings

• cosmetics

• pharmaceutical tablets

• crayons

• ski wax

• polishes

  
  

So, paraffin wax itself is not "dirty crude oil." It is a highly refined petroleum-derived material.

Then Why Is It Still Controversial?

The debate is less about the purified wax sitting on a shelf and more about what happens when it's burned.

When a candle burns, combustion can produce:

• carbon dioxide

• water vapor

• particulate matter (soot)

• VOCs (Volatile Organic Compounds)

• carbon monoxide (especially with incomplete combustion)

• trace combustion byproducts

  
  

The exact emissions depend on the entire candle—not just the wax. Factors include:

• wick design

• fragrance ingredients

• dyes

• additives

• burn conditions

• ventilation

  
  

Why Has Paraffin Been So Popular?

Paraffin isn't used because manufacturers are trying to hide anything—it's used because it offers several practical benefits.

It:

• Holds fragrance well

• Produces vibrant colors

• Burns consistently when formulated correctly

• Is widely available

• Is generally less expensive than many natural waxes

  
  

For these reasons, paraffin has remained a common choice in the candle industry.

Why Are Some Consumers Choosing Alternatives?

In recent years, many people have started paying closer attention to the ingredients in the products they use every day.

As part of that shift, some consumers have chosen to explore waxes derived from renewable sources, including beeswax, coconut wax, and soy wax.

One reason is that researchers have studied emissions released during candle burning, including particulate matter (PM), volatile organic compounds (VOCs), and other combustion byproducts.

Why Olive & Ember Chose a Different Path

When I started Olive & Ember, I wasn't trying to create the "perfect" home fragrance product.

I simply wanted to create products using ingredients I felt good about bringing into my own home. It was about making intentional choices and being transparent about the ingredients we use.

That led me to choose a blend of organic beeswax, organic coconut oil, and phthalate-free fragrance oils.

The Bottom Line

Paraffin wax has been the most popular material in candle making for generations, and it continues to be used in millions of products worldwide.

At the same time, today's consumers are asking more questions than ever before.

They're reading labels.

They're researching ingredients.

They're looking for products that align with their values.

Whether you choose paraffin, beeswax, coconut wax, or another option, understanding what's inside the products you bring into your home is the first step toward making an informed decision.

Sources & Research

This article is intended for educational purposes only and is based on publicly available scientific literature and government resources.

Referenced Sources

• U.S. Energy Information Administration (EIA) – Petroleum Refining Basics

• U.S. Environmental Protection Agency (EPA) – Indoor Air Quality

• U.S. EPA. Profile of the Petroleum Refining Industry

• U.S. EPA Chemical Registry: Slack Wax (Petroleum)

• National Institutes of Health (NIH) – Research on Indoor Air Pollutants

• PubMed – Human Health Risk Evaluation of VOC and Particulate Emissions from Scented Candles

• National Candle Association – Information on Candle Ingredients and Manufacturing

• Krendlinger, E. J., & Wolfmeier, U. Petroleum and Related Crude Oil-Based Waxes. In Natural and Synthetic Waxes (2022)

Research Note: This article is based on peer-reviewed literature, government publications, and industry reference texts. Where scientific evidence is evolving or where studies have reached different conclusions, we've noted that so readers can make informed decisions.