The shelf life of e-liquid is usually 1 to 2 years (unopened). It is recommended to use it up within 1 to 3 months after opening. The specific duration is affected by storage conditions, formula and ingredients.
The shelf life of unopened e-liquid
The regular shelf life: Most brands mark it as 1 to 2 years. In fact, under ideal conditions (sealed, away from light, cool and dry), it can be stored for a longer time.
Component stability: Basic components such as propylene glycol (PG) and vegetable glycerin (VG) have stable chemical properties, but flavorings and nicotine may volatilize or oxidize over time.
2. The service life of the e-liquid after opening
Recommended usage time limit: Use up within 1 to 3 months after opening to ensure taste and safety.
Influencing factors:
High temperature, humidity or direct sunlight can accelerate spoilage, leading to a decline in taste or the development of off-flavors.
Ingredients: E-liquids with a high VG ratio tend to thicken more easily at low temperatures and should be brought back to room temperature before use.
3. Methods for extending the shelf life
Storage conditions:
Temperature: 10℃ to 30℃ is ideal. Avoid extreme high or low temperatures.
Humidity: Relative humidity 40% to 60% to prevent the e-liquid from absorbing water or drying out.
Light exposure: Store completely away from light to prevent ultraviolet rays from damaging the components.
Container selection: It is preferred to use sealed glass bottles for storage to avoid prolonged contact between plastic bottles and e-liquid.
4. Determine whether the e-liquid has deteriorated
Observe the color: A change from colorless to light red, light brown, etc. may indicate normal oxidation, but sudden color changes should be taken seriously.
Smell the odor: A slight aging reaction is normal, but if there is a sour or pungent smell, it should be discarded.
Try the taste: If the taste becomes significantly lighter, bitter or has an odd smell, it indicates that the e-liquid has gone bad.
5. Special Circumstances Explanation
Low-temperature storage: Unopened e-liquid can be frozen for storage, but it is necessary to ensure a good seal to prevent condensation water from entering.
Long-term storage: If the e-liquid formula is mature and the storage conditions are appropriate, it can still be safely used after the marked expiration date, but the taste may decline.
Suggestion: Use it as soon as possible after opening to avoid long-term storage. Regularly check the condition of the e-liquid. Discard it immediately if any deterioration is found. Choose products from regular brands to ensure the safety of the formula and ingredients.