What are the reasons for e-liquid discoloration?

E-liquid discoloration is a common phenomenon experienced by electronic cigarette users, where the e-liquid gradually changes from clear and transparent to light white or light brown, which can be confusing.

So, what are the reasons for e-liquid discoloration?

Firstly, e-liquid discoloration is a normal phenomenon caused by the contact and oxidation of propylene glycol in the e-liquid with oxygen in the air. When e-liquid is exposed to air, oxygen reacts with its components, causing the color of the e-liquid to change. This reaction is normal and does not produce harmful substances, so there is no need to worry about the harm of e-liquid discoloration to the body.

Secondly, e-liquid can undergo three changes after being opened, including discoloration, change in taste, and degradation. Among them, discoloration is the most common occurrence. Generally, it is normal for e-liquid to change from colorless to light white or light brown after being stored for 1 to 3 months, and the discoloration may fluctuate. If the e-liquid continues to change significantly in color after being stored for half a year, it may have degraded.

Finally, prolonged storage of e-liquid can result in changes in taste. Just like wine, slight changes in taste are normal reactions and do not affect the use of e-liquid. E-liquid degradation is less common and is usually caused by unreasonable formulation and overly complex ratio of e-liquid ingredients. In this case, the most accurate way to determine if the e-liquid can still be used is to directly take a puff and see if there is a noticeable change in taste.

In conclusion, e-liquid discoloration is a normal phenomenon and does not pose harm to the body. However, in order to ensure the quality and taste of e-liquid, consumers should pay attention to storage conditions, avoid exposure to sunlight or high temperatures, to prevent e-liquid from deteriorating. If there are obvious signs of e-liquid degradation, it is best to replace it with new e-liquid in a timely manner.

What is the shelf life of e-cigarette e-liquid?

The composition of e-cigarette e-liquid is relatively stable, so it can be stored for a long time. Although the shelf life is usually labeled as one to two years, in reality, it can still be used for over three years. However, if there are doubts about e-liquid that has been stored for a long time, it is better not to use it.

Determining whether e-liquid has spoiled depends on multiple factors, such as the quality of propylene glycol (PG), vegetable glycerin (VG), nicotine, and flavorings, the ratio in which they are mixed together, and the storage conditions of the e-liquid. These factors can all affect the shelf life of e-liquid.

How long should a cartridge last?

Different atomizers have different cartridge capacities, commonly ranging from 1.8ml, 2ml, 3ml, 3.5ml, etc. Therefore, when choosing a cartridge capacity, you need to consider your own smoking frequency and habits. It is generally recommended to finish a cartridge within 3 days, as keeping it for too long may result in the e-liquid being contaminated by carbon buildup on the atomizer coil and may also lead to leakage. If you find that a bottle of e-liquid is too large to finish, you can choose a smaller cartridge capacity.

It should be noted that although e-liquid can still be used after it changes color, it is best not to store e-liquid for too long.