Flash Point is the lowest temperature at which a liquid produces enough vapour to ignite when exposed to an ignition source such as an open flame or spark. One of the most commonly used methods for measuring Flash Point is the Closed Cup technique, as defined in ASTM D56. Flash Point is typically evaluated together with the Boiling Point to classify flammability for transportation of dangerous goods, SDS authoring, and GHS classification of hazardous materials.
How Flash Point Testing Works
In our laboratory, 55 mL of the liquid sample is placed in a closed metal cup and heated at a controlled rate of 1°C per minute. Every 30 seconds, a small test flame is passed over the vapour space. The Flash Point is recorded as the lowest temperature at which the vapours ignite.
General Flammability Classification
The following categories are often used, but always verify the exact criteria in your country’s regulations:
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Extremely flammable: Flash Point < 23°C and Initial Boiling Point ≤ 35°C
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Highly flammable: Flash Point < 23°C and Initial Boiling Point > 35°C
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Flammable liquid: Flash Point ≥ 23°C and ≤ 60°C
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Combustible liquid: Flash Point ≥ 60°C and ≤ 93°C
Note: Requirements may vary by jurisdiction. Consult local regulations or GHS standards for precise classification.
For pricing information, please refer to our Price List, or explore our testing services for GHS classification and SDS preparation on our website. For Flash Point testing or to discuss your project needs, please contact us by email. LCS Laboratory Inc. is committed to supporting your product safety and regulatory compliance ©
