This is just great information from Debora Labs on how to care for peptides which HCG is a water based peptide.
Storage and Expiry Information for peptides
Peptides facts
The peptides are all produced using the same laboratory procedure (known as lyophilization). This means that the storage instructions for all three peptides is the same, and as follows.
How to store the peptides?
All vials should be stored in carefully sealed plastic containers or satchels. When refrigerated, the mixed and unmixed vials must be kept separate from food and beverages to avoid any cross contamination risk.
Freezing the peptides
Before vials have been reconstituted (so the vials still contain the powdered peptide), you can store them in the freezer. You should only freeze and thaw the peptides once, because doing this repeatedly causes damage to the peptide. It is only necessary to freeze the peptides if you don’t plan to use them within the next 18 months. Refrigeration will keep these peptides stable for one and a half years, so there is no need to freeze your peptides if you will be using them within this period.
Should you pre-load these peptides into syringes?
While from a technical perspective pre-loading the peptides in syringes will not harm the quality, if you freeze a pre-loaded syringe you may find that particles will form in the thawed peptide. These can cause pain and irritation when injected. Refrigerating pre-loaded syringes should not cause these problems.
*Expiration times for peptides
Room Temperature
When stored at room temperature (maximum 45 Celsius), unmixed peptides can be kept for 60 days, but reconstituted peptides must be used within 48 hours.
Refrigerated
When refrigerated between 2 and 8 degrees Celsius, unmixed peptides can be stored for 18 months, whereas mixed peptides must be used within two months.
Frozen
When frozen at -20 Celsius, unmixed vials of peptides can be kept for 24 months. Mixed peptides are not suitable for freezing as particles can form.*
Expired peptides
When peptides are stored longer than recommended, the peptide will start to degrade. This does not cause it to become harmful or dangerous, however may result in it being less effective. This means that if you use them, while no harm will occur, you may not get the results you would expect from unexpired peptides.