What Is Volatile Matter?
Volatile matter refers to the gases and organic compounds released when charcoal is heated, excluding moisture and fixed carbon. These substances include hydrocarbons, tars, and other vapors that are driven off during the early stages of combustion or thermal decomposition.
In charcoal production, volatile matter is a key indicator of carbonization quality. Lower volatile content generally means a cleaner, hotter, and more stable burn, which is essential for shisha charcoal, culinary applications, and industrial-grade briquettes.
Why Volatile Matter Matters in Charcoal
Affects Smoke and Odor
High volatile matter can cause excessive smoke, smell, and sparking, which negatively impacts the user experience, especially in indoor or enclosed settings.
Influences Burn Cleanliness
Charcoal with low volatile content burns more uniformly and efficiently, producing less residue and fewer emissions.
Indicator of Carbonization Level
A low percentage of volatile matter (typically below 15%) indicates that the charcoal has undergone complete pyrolysis, transforming it into nearly pure carbon.
Impacts Ignition Behavior
Charcoal with higher volatile content may ignite faster but at the cost of producing more smoke and an unstable burn.
Volatile Matter Levels by Product Type
Premium Coconut Shell Briquettes
Volatile matter: 8%–12%
Ensures clean ignition, long burn time, and odor-free performance—ideal for shisha and premium grilling.
Hardwood Lump Charcoal
Volatile matter: 10%–20%
Varies depending on species and carbonization method; may produce more visible smoke during ignition.
Quick-Light Charcoal Tablets
Volatile matter: High (often 25%+)
Contains added ignition agents, leading to faster start but smokier combustion and possible odor.
Read: Instant Light Charcoal
How Volatile Matter Is Measured
Gravimetric Analysis (ASTM D3175)
In lab conditions, a sample is heated in an inert atmosphere (usually at 950°C) to isolate and weigh the volatile components released.
Routine Batch Testing
Manufacturers perform regular testing to ensure volatile matter remains within quality specifications for each product line.
Customer-Specific Specs
Export buyers—especially in Europe and the Middle East—often set volatile matter limits in contracts to ensure clean-burning performance.
Production Techniques to Control Volatile Matter
Extended Carbonization
Charcoal is heated for longer periods or at higher temperatures in retort kilns to drive off more volatiles.
Slow Cooling and Proper Venting
Gradual cooling prevents condensation of tars and resins, further lowering volatile content.
Double Carbonization (Optional)
For ultra-low volatile applications, some manufacturers may reprocess charcoal to reach levels as low as 5%.
Did You Know?
Premium-grade coconut shell charcoal briquettes with volatile matter below 10% are preferred by luxury shisha lounges and eco-conscious retailers because they provide smoke-free sessions, neutral flavor, and minimal emissions.