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Electronic cigarette e-liquid flash point test and safety appraisal certificate
According to Chapter 32 of Part 3 of the "Recommendations on the Transport of Dangerous Goods - Manual of Tests and Standards" specifically developed by the United Nations for the transport of dangerous goods, liquids with a flash point higher than 60 ° C in a closed cup test may not be considered flammable. The flash point is the lowest temperature at which a material or product ignites and immediately burns when it comes into contact with a mixture of air and flame, indicating the material or product's tendency to evaporate and its stability after heating. It is one of the important parameters for the transportation, storage, operation, and safety management of e-liquid products.
The flash point test of electronic cigarette e-liquid is an important step in evaluating its flammability and transportation safety. According to Chapter 32 of Part 3 of the UN Manual of Tests and Criteria on the Transport of Dangerous Goods, the flash point is a key parameter for determining whether e-liquid is flammable. The following is a detailed explanation about the flash point test and safety appraisal certificate of electronic cigarette e-liquid:
Definition of flash point
Flash point refers to the lowest temperature at which a material or product can ignite and immediately burn when in contact with a flame under specific conditions. The high or low flash point directly reflects the flammability and volatility of e-liquid:
Flash point ≤ 60 ° C: It is a flammable liquid and should be transported and stored as a hazardous material.
Flash point>60 ° C: It is generally not considered a flammable liquid and has fewer transportation and storage restrictions.
Flash point testing method
The flash point test of e-liquid usually uses the Closed Cup Method, and commonly used testing standards include:
ASTM D93: Use the Pensky Martens closed cup tester.
ISO 2719: Use the Pensky Martens closed cup tester.
ASTM D3828: Use Setaflash closed cup tester.
Test steps
Sample preparation: Take an appropriate amount of e-liquid sample to ensure that the sample is free from contamination.
Instrument calibration: Calibrate the closed cup tester according to the testing standards.
Heating the sample: Slowly heat the e-liquid sample and regularly test for flash fire using an ignition source.
Record flash point: Record the lowest temperature at which flash fire occurs.
Repeated testing: Typically, multiple tests are required to ensure the accuracy of the results.
The significance of flash point testing
Transportation classification:
Flash point ≤ 60 ° C: e-liquid is a hazardous material and must be packaged, labeled, and transported in accordance with UN standards.
Flash point>60 ° C: e-liquid is usually not considered a hazardous material and has fewer transportation restrictions.
Storage safety:
Flash point data helps determine the storage conditions for e-liquid, such as temperature control, ventilation requirements, etc.
Operational safety:
Flash point data can be used to develop safety operating procedures for the production, filling, and use of e-liquids.
Safety appraisal certificate
Based on the flash point test results, the certification body can issue a safety appraisal certificate to prove whether the flash point of e-liquid meets the relevant transportation and storage requirements. A safety appraisal certificate usually includes the following contents:
Product information: Name, ingredients, batch number, etc. of e-liquid.
Testing method: The flash point testing standards and methods used.
Test result: Specific value of flash point.
Conclusion: Determine whether e-liquid is a flammable liquid and whether it meets transportation and storage requirements.
Validity period: The validity period of the safety appraisal certificate is usually 1 year and needs to be updated regularly.
Applicable regulations and standards
The United Nations Recommendations on the Transport of Dangerous Goods Manual of Tests and Standards:
Chapter 32 of Part 3 specifies the methods and criteria for flash point testing.
International Air Transport Association (IATA) Dangerous Goods Regulations:
Specific requirements have been put forward for the transportation of liquids such as e-liquid.
National regulations:
Such as the CLP regulations (Classification, Labeling and Packaging) of the European Union and the OSHA standards of the United States.
The particularity of flash point testing for electronic cigarette e-liquids
Component complexity:
E-liquid is usually composed of propylene glycol (PG), vegetable glycerin (VG), flavorings, and nicotine, among others, and different components may affect the flash point.
volatility:
The spices and nicotine in e-liquid may have high volatility, and special attention should be paid to testing conditions.
Batch differences:
Different batches of e-liquid may have different flash points due to varying composition ratios, and testing is required for each batch.
summary
The flash point test of electronic cigarette e-liquid is an important step to ensure its transportation, storage, and operational safety. By using the closed cup test method to determine the flash point of e-liquid, it is possible to determine whether it is a flammable liquid and develop corresponding safety management measures accordingly. The safety appraisal certificate is an important document that proves that e-liquid complies with relevant regulations and standards, which helps the product enter the market smoothly and ensures user safety.
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