Nowfel Insights
Toluene: Properties, Uses, Production, Price, Safety & Suppliers
From the paint on your walls to the fuel in your car, toluene is a versatile chemical that plays an important role in everyday life. It is widely used in paints, coatings, adhesives, and nail products, while also serving as a valuable component in gasoline and a key feedstock for the production of various chemicals. Its widespread use makes toluene an important compound across the chemical, petrochemical, and manufacturing industries.
What Is Toluene?
Toluene is a clear, colorless aromatic hydrocarbon with the molecular formula C₇H₈. Its structure consists of a benzene ring bonded to a methyl group (–CH₃), making it a methyl-substituted benzene. Toluene belongs to the aromatic hydrocarbon family, a group of compounds characterized by a stable aromatic ring structure.
We have prepared a table of the physical and chemical properties of toluene for you below.
| Property | Value |
|---|---|
| Chemical name | Toluene |
| Another name | Methylbenzene |
| Chemical formula | C₇H₈ |
| Molar mass | 92.14 g/mol |
| Appearance | Clear, colorless liquid |
| Odor | Sweet, characteristic aromatic odor |
| Density | 0.87 g/cm³ at 20°C |
| Melting point | −95°C |
| Boiling point | 110.6°C |
| Flash point | 4.4°C |
| Solubility in water | Slightly soluble |
| Vapor pressure | ~28.4 mmHg at 25°C |
| Autoignition temperature | ~480°C |
| Chemical family | Aromatic hydrocarbon |
| CAS number | 108-88-3 |
history
Toluene was first isolated in 1837 by Pierre Joseph Pelletier and Filip Neriusz Walter through the distillation of pine oil, and they named it rétinnaphte. In 1841, Henri Étienne Sainte-Claire Deville isolated a similar hydrocarbon from Tolu balsam and initially called it benzoène. The name toluin was proposed by Jöns Jacob Berzelius in 1843, while the name toluène was later given by French chemist Auguste Cahours, who identified the compound in a wood distillate in 1850.
Toluene Feedstocks and Sources
- Crude oil
- Naphtha
- Reformate
- Pyrolysis gasoline
- BTX-rich streams
- Petroleum refining streams
How Is Toluene Produced?
Toluene is mainly produced from petroleum-derived streams and is typically recovered or generated during refinery and petrochemical processes. To better understand the role of each of these facilities in the production chain, you can also refer to an article we published some time ago titled What Is the Difference Between a Refinery and a Petrochemical Plant?
So, stay with us as we go on to introduce the most common methods of toluene production.
Toluene Production from Petroleum
Toluene is ultimately derived from crude oil through the processing of petroleum fractions. Crude oil is separated into different streams in a refinery, and aromatic-rich fractions can then be processed to produce or recover toluene along with other BTX aromatics, particularly benzene and xylene.
Toluene Production in Refineries
In refineries, toluene is commonly obtained from reformate streams generated during the processing of naphtha. The aromatic-rich reformate contains toluene, benzene, and xylene, which can be separated through processes such as extraction and distillation. The recovered toluene can then be further purified to meet specific product specifications.
Catalytic Reforming and Toluene
Catalytic reforming is one of the most important processes for producing toluene. In this process, naphtha is converted over a catalyst at elevated temperatures, causing hydrocarbons to undergo reactions that increase the concentration of aromatic compounds. The resulting reformate is rich in BTX aromatics and serves as a major source of toluene.
Toluene Recovery from Pyrolysis Gasoline
Pyrolysis gasoline, a by-product of steam cracking, contains significant amounts of aromatic hydrocarbons, including benzene, toluene, and xylene. After suitable treatment to remove impurities and reactive compounds, the aromatic fraction can be separated and toluene recovered through extraction and distillation. This route is particularly important in petrochemical complexes where pyrolysis gasoline is available as a feedstock.
Top 5 Uses of Toluene
Now, let’s explore What is toluene used for? across five significant applications.
1. Toluene as an Industrial Solvent
Toluene is widely used as an organic solvent because it can dissolve many substances that do not readily dissolve in water. It is commonly used in paints, coatings, adhesives, inks, and cleaning formulations, where it helps dissolve ingredients and control product consistency.
2. Toluene in Paints, Coatings, and Adhesives
Toluene is used in the formulation of paints, lacquers, varnishes, and adhesives. Its ability to dissolve resins and other organic compounds makes it useful for producing smooth coatings and adhesive formulations. It also evaporates relatively quickly, allowing the solvent to leave the applied product during drying.
3. Toluene in Chemical Production
Beyond its role as a solvent, toluene is an important feedstock for producing a range of chemical intermediates. It can be converted into compounds such as toluene diisocyanate (TDI), benzoic acid, and other derivatives used in the chemical and manufacturing industries.
4. Toluene in Fuels and Gasoline
Toluene is also present in gasoline and other fuel streams. Because of its high octane value, it can contribute to the octane rating of gasoline and is therefore an important aromatic component in fuel blending. Its use in fuels is closely associated with refinery and petrochemical processes.
5. Toluene in Everyday Products
Although toluene is primarily an industrial chemical, people can encounter it in certain consumer products. It has historically been used in products such as nail products, paints, paint thinners, adhesives, and some cleaning formulations. Its presence and permitted concentration vary depending on the product and applicable regulations.
Toluene in the Petrochemical Industry
Toluene is an important part of the petrochemical value chain and is one of the three major aromatic hydrocarbons in the BTX group, alongside benzene and xylene. It is commonly obtained from aromatic-rich refinery and petrochemical streams and can be further processed or converted into higher-value chemicals.
Through different conversion routes, toluene can serve as a feedstock for producing chemical intermediates and derivatives that are used in a wide range of downstream industries. Key toluene derivatives and products include:
- Toluene Diisocyanate(TDI): A major derivative of toluene used primarily in the production of polyurethane foams, coatings, adhesives, and elastomers.
- Benzene and Xylene: Toluene can be converted into benzene and xylene through processes such as hydrodealkylation and disproportionation, allowing it to be used as a source of other valuable BTX aromatics.
- Benzoic Acid: Produced through the oxidation of toluene, benzoic acid is an important chemical intermediate used in various industrial and manufacturing applications.
- Other Toluene Derivatives: Toluene can also be converted into a variety of other chemical intermediates, expanding its role as a feedstock within the petrochemical value chain.
Toluene Market and Major Producers
In 2024, global toluene production was estimated at around 14 million tonnes, with China accounting for approximately 30% of total global output and ranking as the world’s largest producer of this chemical. Major toluene producers are concentrated in Asia, North America, and other regions with large and integrated refining and petrochemical industries.
In addition to Southeast Asian countries, Middle Eastern countries also play an important role in toluene production and trade. According to UN Comtrade trade data, Iran exported around 80,000 tonnes of toluene in 2024, accounting for approximately 68% of total toluene exports from the Middle East, making it the region’s largest exporter. The value of these exports was reported at around $82 million.
| Company | Country / Region | Role in Toluene Production |
|---|---|---|
| Sinopec Group | China | Major integrated refining and petrochemical producer with significant aromatic production |
| PetroChina / CNPC | China | Major producer of aromatics through its extensive refinery and petrochemical network |
| Hengli Petrochemical | China | Large integrated refinery and petrochemical producer with significant aromatics capacity |
| CNOOC | China | Major refining and petrochemical company with toluene and other aromatic production |
| ExxonMobil | United States | Integrated energy and petrochemical producer with aromatic production across its refining network |
| Lotte Chemical | South Korea | Major producer of aromatics and petrochemical products |
| GS Caltex | South Korea | Integrated refinery and major aromatics producer |
| SK Innovation / SK Energy | South Korea | Major refining and petrochemical producer with aromatic production |
| Reliance Industries | India | Large integrated refining and petrochemical producer with aromatic production |
| Formosa Chemicals & Fibre | Taiwan | Major producer of aromatics and petrochemical products |
| Bandar Imam Petrochemical Company | Iran | Major Iranian producer of aromatic products, including benzene, toluene, and xylene |
Toluene vs Benzene vs Xylene
As mentioned above, toluene is an aromatic hydrocarbon with the formula C₇H₈, consisting of a benzene ring with a methyl group (–CH₃) attached to it. This structure gives toluene a higher boiling point and lower volatility than benzene, while retaining the characteristic properties of aromatic hydrocarbons. It is produced mainly from petroleum-derived streams, particularly through catalytic reforming and recovery from aromatic-rich streams, and is used as a solvent, fuel component, and feedstock for producing derivatives such as TDI. In terms of toxicity, toluene can affect the nervous system at high or prolonged exposure, but its toxicological profile differs from that of benzene.
On the other hand,Benzene is the simplest of these three aromatic hydrocarbons, with the formula C₆H₆ and a six-membered aromatic ring containing no additional substituent. It is more volatile than toluene and xylene, with a much lower boiling point, and is an important chemical feedstock for producing materials such as ethylbenzene, styrene, and cyclohexane. Benzene is primarily obtained from petroleum refining and petrochemical processes, including catalytic reforming and steam-cracker streams. Unlike toluene and xylene, benzene is a well-established human carcinogen, making its toxicity and occupational exposure limits a particularly important concern.
Xylene refers to a group of three aromatic isomers—o-xylene, m-xylene, and p-xylene—with the formula C₈H₁₀. Its structure consists of a benzene ring with two methyl groups, giving it a higher molecular mass and generally higher boiling points than benzene, while its physical properties vary somewhat among the three isomers. Xylene is produced mainly from catalytic reformate and other aromatic-rich petroleum streams and is widely used as a solvent and as a feedstock for products such as terephthalic acid and phthalic anhydride. Its toxicity is generally associated with effects on the central nervous system and irritation at sufficiently high exposure levels.
| Property | Toluene | Benzene | Xylene |
|---|---|---|---|
| Chemical formula | C₇H₈ | C₆H₆ | C₈H₁₀ |
| Structure | Benzene ring + one methyl group (–CH₃) | Six-membered aromatic ring | Benzene ring + two methyl groups (–CH₃) |
| Number of isomers | One main structural form | One structural form | Three: o-xylene, m-xylene, p-xylene |
| Molar mass | 92.14 g/mol | 78.11 g/mol | 106.17 g/mol |
| Boiling point | 110.6°C | 80.1°C | ~138–144°C, depending on isomer |
| Melting point | −95°C | 5.5°C | ~−47 to +13°C, depending on isomer |
| Density at 20°C | ~0.87 g/cm³ | ~0.88 g/cm³ | ~0.86–0.88 g/cm³, depending on isomer |
| Volatility | Lower than benzene | Highest of the three | Generally lower than benzene and toluene |
| Carbon atoms | 7 | 6 | 8 |
| Hydrogen atoms | 8 | 6 | 10 |
| Chemical family | Aromatic hydrocarbon | Aromatic hydrocarbon | Aromatic hydrocarbon |
| Main production sources | Catalytic reforming, refinery streams, pyrolysis gasoline | Catalytic reforming, pyrolysis gasoline, other refinery streams | Catalytic reforming, refinery streams, pyrolysis gasoline |
| Key uses | Solvents, fuel blending, chemical feedstock | Chemical feedstock and intermediate production | Solvents and production of chemical intermediates |
| Important derivatives | TDI, benzoic acid, benzene and xylene | Ethylbenzene, styrene, cyclohexane | Terephthalic acid, phthalic anhydride and other intermediates |
| Toxicity | Harmful at high or prolonged exposure; affects the nervous system | Known human carcinogen; prolonged exposure can cause serious health effects | Can cause irritation and central nervous system effects at high exposure |
| Key structural difference | One methyl group attached to the aromatic ring | No methyl substituent | Two methyl groups attached to the aromatic ring |
is acetone the same as toluene?
No, acetone and toluene are different chemical compounds. Acetone is a ketone with the formula C₃H₆O, while As mentioned above, toluene is an aromatic hydrocarbon with the formula C₇H₈. Both can be used as organic solvents, but they differ significantly in chemical structure, physical properties, and industrial applications.
Toluene Purchase
If you are looking to purchase toluene for industrial or commercial requirements, Nowfel FZC can supply this product directly through established relationships with major toluene producers. We source the material directly from manufacturers and can arrange supply according to the required grade, volume, and destination, helping customers access a reliable supply chain for their toluene requirements.
Toluene Price
The price of toluene is influenced by crude oil and feedstock costs, regional supply and demand, refinery operating conditions, and logistics. As a result, market prices can change over time and may vary depending on origin, grade, order volume, and delivery destination.
What Affects Toluene Price?
- Crude Oil Prices: Changes in crude oil prices can influence the cost of petroleum-derived feedstocks used to produce toluene.
- Supply and Demand: Strong demand or limited availability can push toluene prices higher, while weaker demand may put downward pressure on prices.
- Refinery Operating Rates: Changes in refinery utilization can affect the availability of aromatic streams and consequently influence toluene supply.
- Feedstock Costs: The price and availability of naphtha and other refinery feedstocks can directly affect production economics.
- Regional Market Conditions: Prices can differ between regions depending on local supply, inventories, trade flows, and market conditions.
- Transportation Costs: Freight, insurance, port charges, and the delivery route can have a noticeable effect on the final delivered price.
- Order Volume and Specifications: Purchase quantity, product specifications, packaging, and required delivery terms can all influence the quotation offered to a buyer.
Need a dependable source for your toluene requirements? Nowfel company works with established producers to arrange supply for customers across international markets. Share your required specification, volume, and destination with our sales team to receive a tailored quotation.
Proforma Invoice for Toluene
Before purchasing imported chemical products, buyers often require a proforma invoice to review the commercial terms of the transaction. This preliminary document provides key information such as the product specification, required quantity, unit price, payment terms, delivery conditions, and other relevant details. It allows the buyer to evaluate the proposed transaction before placing the final order and may also be required for procedures such as import approvals, banking processes, and customs clearance.
If you need a proforma invoice for toluene, Nowfel FZC can prepare the required commercial documentation based on your purchasing requirements. Simply provide details such as the desired quantity, specification, destination, and preferred delivery terms, and our sales team can assist with preparing a quotation and proforma invoice for your order.
Why Choose Us as Your Toluene Supplier?
- Direct Producer Sourcing: We source toluene directly from established manufacturers, helping create a more reliable supply chain.
- International Supply: Our trading network enables us to serve customers across different markets and destinations.
- Flexible Order Quantities: We can discuss supply options based on your required volume and purchasing requirements.
- Product Specifications: We can provide relevant technical and commercial information so buyers can assess the product before ordering.
- Competitive Quotations: Our sourcing model allows us to evaluate producer offers and provide commercially competitive quotations.
- End-to-End Support: From initial inquiry and quotation to documentation and shipment coordination, our team supports the purchasing process.
- Responsive Sales Team: Our specialists can review your requirements and recommend a suitable supply option based on your destination and specifications.
For more information or to purchase toluene, feel free to contact us by email. Our sales and support team will get back to you as soon as possible and assist you with your requirements.
Toluene Safety and Health Effects
Toluene is a volatile and highly flammable aromatic hydrocarbon, so proper handling, ventilation, storage, and exposure control are important when it is used in industrial or commercial settings. Health risks depend largely on the concentration, duration, and route of exposure, with inhalation being a particularly important exposure pathway.
Toxicology and Metabolism
One of the questions that has been on most people’s minds is Is Toluene Toxic? Yes, toluene can be harmful to human health, particularly when exposure is high or prolonged. After entering the body, it is rapidly absorbed and metabolized, mainly in the liver, where it is converted primarily into benzoic acid and subsequently conjugated to form hippuric acid, which is excreted in urine. The extent of toxicity depends on factors such as exposure level, duration, and individual susceptibility.
What Does Toluene Do to the Human Body?
Exposure to high concentrations of toluene primarily affects the central nervous system and may cause symptoms such as headache, dizziness, fatigue, confusion, and impaired coordination. More severe exposure can lead to loss of consciousness and other serious neurological effects. Repeated or prolonged exposure may also affect the liver, kidneys, and nervous system.
What Happens to Toluene in the Environment?
Once released into the environment, toluene is relatively volatile and can readily move from water or soil into the air. In the atmosphere, it is broken down mainly through reactions with hydroxyl radicals, while microorganisms can also degrade it in soil and water. Because of its volatility and biodegradability, toluene generally does not persist in the environment for very long compared with less volatile organic pollutants.
Toluene Safety and Storage
As mentioned above, Toluene is a highly flammable liquid and should be stored in a cool, dry, and well-ventilated area away from heat, sparks, open flames, and other ignition sources. It should be kept in tightly closed, properly labeled containers made of compatible materials, with adequate measures in place to prevent leaks and vapor accumulation.
During handling, appropriate personal protective equipment such as chemical-resistant gloves and safety goggles should be used, and exposure to its vapors should be minimized through effective ventilation and appropriate engineering controls.