An electric spark replaces the open flame
For decades, the measurement of a liquid's ignition threshold has carried its own quiet irony: the test itself posed a fire risk. With the publication of ISO 24966, an international body has now codified a method that closes the chamber, replaces the open flame with an electric spark, and asks laboratories to work with just two milliliters of sample — a technical refinement that is also, in the oldest sense, a matter of prudence. The standard arrives not as a disruption but as a ratification, confirming what careful observation had already suggested: that safety and precision need not be traded against each other.
- Open-flame flash point testing has long carried a genuine hazard — volatile fumes escaping testing apparatus have created real fire risks in laboratories around the world.
- ISO 24966 formalizes the Modified Continuously Closed Cup method, sealing the chamber, shrinking the sample to 2mL, and replacing fire with an electric spark — eliminating the core danger at its source.
- The new standard doesn't ask laboratories to sacrifice data quality for safety; it delivers results equivalent to the entrenched ISO 2719 and ASTM D93 methods while processing samples faster and more repeatably.
- eralytics, which built its product line around this method before it was officially recognized, now finds its eraflash equipment positioned as the compliant instrument of record under the new global standard.
- Refineries, chemical manufacturers, fragrance producers, and hazardous materials handlers all face the same immediate question: not whether this method works, but how quickly they will move to adopt it.
A new international standard for measuring flash point — the temperature at which a liquid ignites — has been published, and it carries the potential to reshape laboratory practice across the petroleum, chemical, and fragrance industries. ISO 24966 codifies the Modified Continuously Closed Cup method, a fundamental departure from the open-flame procedures that have defined the field for generations.
The shift matters most because of what it removes. Traditional methods like ISO 2719 and ASTM D93 rely on an open flame to ignite vapors rising from a heated sample, a process that allows volatile fumes to escape and creates genuine fire risk. The new method seals the chamber, reduces the sample to just 2 milliliters, and uses an electric spark in place of an open flame. The hazard is not mitigated — it is structurally eliminated.
The closed-chamber design also improves the science. Because vapors cannot escape, measurements are more precise and more repeatable. Smaller samples and automated processes mean no cooling periods between tests, allowing laboratories to run significantly more analyses per day — a meaningful advantage for refineries conducting hundreds of quality-control checks each week or fragrance manufacturers iterating on new formulations.
For eralytics, the publication of ISO 24966 is a moment of institutional validation. The company had been developing and promoting the MCCCFP method for years before it carried the weight of international recognition. Their eraflash product line — including the eraflash X, the eraflash LT for low-temperature applications, and the eraflash S10 automated sampler — is now positioned as the compliant standard for this new era of testing.
The industries affected are broad: petroleum refineries certifying fuels and lubricants, chemical manufacturers testing solvents, transportation and waste management operations handling hazardous materials, and fragrance producers ensuring safety compliance. For all of them, ISO 24966 offers a clear, internationally recognized path to faster and safer testing. The method has been proven. The standards bodies have spoken. What remains is the pace of adoption.
A new international standard for measuring flash point—the temperature at which a liquid ignites—has just been published, and it promises to reshape how laboratories across the world test petroleum, chemicals, and fragrances. The standard, called ISO 24966, codifies a method known as the Modified Continuously Closed Cup, or MCCCFP. It represents a fundamental shift away from the open-flame testing procedures that have dominated the field for decades, replacing them with a closed-chamber approach that uses electric ignition instead.
The significance of this shift lies in what it eliminates: risk. Traditional flash point testing, conducted under standards like ISO 2719 and ASTM D93 (the Pensky-Martens method), relies on an open flame to ignite vapors rising from a heated liquid sample. The danger is real. Volatile fumes can escape the testing apparatus, creating conditions for laboratory fires. The new MCCCFP method sidesteps this hazard entirely. It uses only 2 milliliters of sample—a fraction of what older methods require—and performs the ignition test inside a continuously sealed chamber. An electric spark replaces the open flame. The result is a fundamentally safer procedure that delivers the same quality of data as the methods it's designed to replace.
Beyond safety, the closed-chamber design offers two other advantages that laboratories will find compelling. Because volatile components cannot escape into the air, the measurements are more precise and more repeatable. The method also moves faster. Smaller samples, automated processes, and no need for cooling periods between tests mean laboratories can process more samples in a single day. For a refinery running hundreds of quality-control tests weekly, or a fragrance manufacturer testing new formulations, this speed translates directly to operational efficiency.
The eralytics company, which manufactures flash point testing equipment, has been developing and promoting the MCCCFP method for years. With the publication of ISO 24966, their product line—including the eraflash X tester, the eraflash LT for low-temperature applications, and the eraflash S10 automated sampler—now carries the full weight of international standardization. The company framed the moment as validation of a technology they had championed before it was officially recognized. Their equipment is now positioned as the compliant way to conduct flash point testing under the new standard.
The industries that stand to benefit span a wide spectrum. Petroleum refineries, which must certify the flash points of fuels and lubricants before they leave the facility, can adopt the new method with regulatory confidence. Chemical manufacturers testing solvents and other flammable compounds face the same imperative. Transportation companies that handle hazardous materials, waste management operations processing industrial byproducts, and fragrance producers formulating new scents all rely on flash point data to ensure safety and compliance. For all of them, ISO 24966 offers a path to faster, safer testing without sacrificing accuracy.
The publication of this standard marks the moment when a safer method transitions from innovation to institutional norm. Laboratories that have been using traditional open-flame procedures for years now have a clear, internationally recognized alternative. The question is no longer whether the MCCCFP method works—it does, and now the world's standards bodies have said so. The question is how quickly the industry will move to adopt it.
Citas Notables
The official release of ISO 24966 is a global validation of the technology we have championed for years. Our eraflash series is ready to provide customers with a safer, faster, and fully compliant way to conduct critical quality control.— eralytics team
La Conversación del Hearth Otra perspectiva de la historia
Why does flash point testing matter enough to warrant an international standard?
Because flash point is the threshold between a liquid that's stable and one that's dangerous. If you're shipping fuel, or manufacturing solvents, or storing chemicals, you need to know exactly when those materials become flammable. Get it wrong and you have a fire. Get it right and you have safety and compliance.
And the old methods—they were actually dangerous to the people doing the testing?
Yes. Open-flame testing means you're literally holding a flame near volatile vapors in a lab. Those vapors can escape, accumulate, ignite. It's an inherent risk built into the procedure itself. The new method eliminates that by sealing everything and using an electric spark instead.
So this is really about protecting lab technicians.
It's about that, but also about the quality of the data. When vapors escape, you lose information. The closed chamber captures everything, so your measurements are more accurate. You're protecting people and improving science at the same time.
How long has this technology existed before the standard was published?
Eralytics and others have been developing and using the MCCCFP method for years. But without an international standard, laboratories couldn't rely on it for regulatory purposes. The standard is what gives it legitimacy and makes it usable everywhere.
What changes for a lab the day after this standard is published?
Technically, nothing has to change immediately. But now they have a choice. They can keep using the old methods, or they can transition to something faster, safer, and officially recognized. Over time, the pressure will build—from regulators, from customers, from efficiency demands. The standard makes the transition possible.