If you import coconut charcoal briquettes by the container load, you already track moisture, ash, and fixed carbon on every Certificate of Analysis. But there is a fourth number on that COA that most procurement managers skim past: volatile matter. Skip it, and you could be buying briquettes that smoke unpredictably, ignite unevenly, and burn shorter than the spec sheet promises. Here is exactly what volatile matter means, why it matters more than most buyers realize, and how to read the number correctly.

What Is Volatile Matter? The Fourth Number in Proximate Analysis

Volatile matter (VM) is the percentage of a coconut charcoal briquette that converts to gas when heated to 900 degrees Celsius in an oxygen-free environment. It is one of four components in proximate analysis, alongside moisture, ash, and fixed carbon. Together, these four numbers always sum to approximately 100 percent.

The standard test method is ASTM D1762 Section 9: a dried briquette sample is placed in a covered crucible, heated at 900 plus or minus 10 degrees Celsius for exactly seven minutes, and the weight loss (minus the moisture percentage) is reported as volatile matter. What escapes during those seven minutes is a mix of tar residues, light hydrocarbons, carbon monoxide, carbon dioxide, and chemically bound water. Together, this is everything in the briquette that is not pure carbon, not mineral ash, and not free moisture.

In practical terms, VM is the fuel that vaporizes before the fixed carbon settles into a steady burn. It controls how a briquette lights, how much visible smoke it produces during the first three to five minutes, and whether the heat output ramps up smoothly or spikes unpredictably.

Why Your Supplier's VM Number Determines What Happens When You Light the Briquette

A coconut charcoal briquette with volatile matter below 12 percent lights slowly. The initial flame is weak, the briquette takes longer to reach cooking temperature, and the user (whether a BBQ pitmaster in Dubai or a shisha lounge operator in Riyadh) burns through kindling or starter fuel waiting for usable heat. In a commercial shisha setting where speed of service matters, that delay adds up across dozens of sessions per night.

At the other extreme, a briquette with VM above 20 percent ignites fast but burns dirty. The rapid gas release produces visible white smoke in the first few minutes, which is exactly what premium BBQ competitors and high-end shisha lounges cannot tolerate. Worse, high VM correlates with inconsistent burn temperature. The briquette spikes hot during the volatile release phase, then drops as the fixed carbon takes over, making temperature management harder for the end user.

The sweet spot for most coconut charcoal briquette applications sits between 12 and 18 percent VM. At this range, ignition is fast enough for commercial use, smoke output is minimal after the first 90 seconds, and the transition from volatile burn to fixed carbon burn is smooth, delivering the stable, predictable heat that professional users demand.

Coconut Charcoal vs Wood Charcoal: How Volatile Matter Benchmarks Differ

If you compare coconut charcoal briquettes against wood charcoal briquettes, the VM numbers tell a different story. Coconut shell charcoal typically produces briquettes with lower volatile matter than wood-based alternatives because coconut shells are denser and undergo more complete carbonization at standard production temperatures of 500 to 600 degrees Celsius.

Wood charcoal briquettes commonly carry VM in the 20 to 28 percent range, which is why they smoke more on ignition and produce a stronger aroma during burning. That aroma is sometimes desirable for BBQ but is a liability in shisha: hookah charcoal must be flavor-neutral, meaning volatile compounds that carry taste are a defect, not a feature.

For import buyers serving the GCC shisha market, this is the key specification: coconut charcoal briquettes with VM at or below 15 percent are effectively odorless during the session, while wood charcoal with VM above 22 percent imparts a detectable woody taste to the tobacco. When your end customer is paying premium prices for flavored molasses tobacco, they will notice the difference in the first five minutes.

VM and Smoke: The Specification That Matters Most for Shisha Importers

The relationship between volatile matter and smoke output is direct: every percentage point of VM above 18 percent translates to visibly more white smoke during the ignition phase. For shisha charcoal specifically, the premium-grade benchmark is 12 to 15 percent VM, low enough that the briquette lights clean within 30 to 60 seconds and produces no lingering odor.

Ask your supplier for the VM figure specifically broken out by production batch. A COA that lists only ash, moisture, and fixed carbon without volatile matter is incomplete. You are missing the number that predicts ignition behavior and smoke profile. Professional coconut charcoal briquette exporters serving the GCC and European markets should be able to provide a full four-parameter proximate analysis on every shipment, tested to ASTM D1762.

How Pylar Controls Volatile Matter Through Carbonization Precision

At Pylar's production facility in Sukabumi, West Java, volatile matter is not left to chance. The carbonization process, where raw coconut shells are heated in oxygen-controlled kilns is the single largest lever for VM control. Pylar maintains carbonization temperatures within a tight 500 to 550 degree Celsius range, with batch durations calibrated to shell density and ambient humidity.

Undercook the shells, and volatile matter stays high because incomplete carbonization leaves tars and hydrocarbons trapped in the char. Overcook them, and you sacrifice fixed carbon yield while pushing ash content up. The precision window is narrow, and it requires continuous monitoring rather than set-and-forget kiln operation.

Every Pylar production batch undergoes in-house proximate analysis before shipping. The VM specification for Pylar's SIGNATURE grade coconut charcoal briquettes is 12 to 15 percent, verified at an independent SGS-accredited laboratory in Jakarta. Buyers receive the full four-parameter COA with their shipment : moisture, ash, volatile matter, and fixed carbon, so there is no guessing what is inside the container.

What to Look for in a Certificate of Analysis: The VM Line Item

When your COA arrives, locate the volatile matter line. Check three things:

First, confirm the testing standard. It should reference ASTM D1762 or ISO 17225. A COA without a cited standard is a red flag; you cannot verify the methodology.

Second, verify the VM percentage falls within your contracted range. For premium coconut charcoal briquettes, acceptable VM is 12 to 18 percent depending on application. If your supplier promised 15 percent and the COA reads 21 percent, the batch was under-carbonized and will smoke more than expected.

Third, cross-check the math: fixed carbon should approximately equal 100 minus moisture minus ash minus volatile matter. If the numbers do not sum to roughly 100 percent, the lab may have used different methodologies for different parameters, or one of the numbers is estimated rather than measured.

A single VM reading from one batch tells you something. A consistent VM trend across six months of shipments tells you everything. It reveals whether your supplier's carbonization process is stable or drifting. Track it.

Importing coconut charcoal briquettes without understanding volatile matter is like buying steel without knowing the carbon content. The number is small, but it controls everything downstream: ignition speed, smoke output, burn consistency, and whether your customer reorders or calls to complain.

Ready to see a complete four-parameter COA for Pylar's SIGNATURE grade coconut charcoal briquettes? Scroll down to the contact section below and request your sample shipment. We include the full proximate analysis with every order, and we respond within 24 hours.