Lyophilisation (Freeze-Drying) of Peptides, Explained
Lyophilisation (Freeze-Drying) of Peptides, Explained is supplied for laboratory research only. Key facts are below; stored as lyophilised powder.
Last verified 12 Oct 2026.
A CoA for every lot; each vial carries a printed lot number that matches it. Ask with the lot number and we send it.
The short answer
Lyophilisation freezes a peptide solution and removes the ice by sublimation under vacuum. The result is a dry, porous cake with low residual moisture, which is why research peptides are supplied in this form.
Research use only. Sable Peptides supplies laboratory reagents for in vitro and laboratory research by qualified people. Not a medicine. Not for human or veterinary use.
The short answer
Lyophilisation freezes a peptide solution and removes the ice by sublimation under vacuum. The result is a dry, porous cake with low residual moisture, which is why research peptides are supplied in this form.The three stages
1. Freezing: water crystallises and the peptide (and any excipient) concentrates between the ice crystals. 2. Primary drying: under vacuum and controlled shelf temperature, the ice sublimes. The product must stay below its collapse temperature (Tang & Pikal, 2004). 3. Secondary drying: bound water desorbs at a higher temperature, bringing residual moisture down.Excipients
Some peptides are lyophilised neat. Others use bulking agents such as mannitol or stabilisers such as sugars. Mannitol may crystallise in different forms depending on concentration and freezing (Kim et al., 1998). A blank COA field for excipients usually means none were added, but ask if it matters for your assay.Reading the cake
| Appearance | What it suggests | |---|---| | White, uniform, porous | A normal cake | | Shrunken or pulled away from the wall | Minor shrinkage, common and usually cosmetic | | Glassy or collapsed | Drying exceeded the collapse temperature; worth querying | | A powder film instead of a cake | Small fill amounts often look like this |After freeze-drying
Moisture uptake undoes the advantage of drying, so keep vials sealed and cold, and let them warm before opening (Manning et al., 2010).Quick reference
This page is the broader explainer. The condensed reference card with cited facts is at /ref/lyophilisation.Related on Sable
- /ref/lyophilisation - /learn/peptide-storage-guide - /learn/vials-and-packaging - /glossarySources
1. Tang X et al.. Design of freeze-drying processes for pharmaceuticals: practical advice. *Pharm Res* 2004;21:191-200. PMID 15032301. doi:10.1023/b:pham.0000016234.73023.75 2. Kim AI et al.. The physical state of mannitol after freeze-drying: effects of mannitol concentration, freezing rate, and a noncrystallizing cosolute. *J Pharm Sci* 1998;87:931-5. PMID 9687336. doi:10.1021/js980001d 3. Manning MC et al.. Stability of protein pharmaceuticals: an update. *Pharm Res* 2010;27:544-75. PMID 20143256. doi:10.1007/s11095-009-0045-6*Last reviewed: 2026-10-10. Original Sable content; sources verified via PubMed E-utilities / Crossref / live HTTP checks on 2026-10-10.*
Last reviewed: 2026-10-10
How much does Lyophilisation (Freeze-Drying) of Peptides, Explained cost in the UK?
Frequently asked questions
What is lyophilisation?
Freeze-drying: the solution is frozen, then the ice is removed by sublimation under vacuum, leaving a dry, porous solid.
Why are peptides supplied lyophilised?
Removing water slows the hydrolysis, deamidation and other reactions that limit shelf life in solution.
What is cake collapse?
A loss of the porous structure during drying, when the product temperature goes above its collapse temperature. It looks shrunken or glassy.
Why might mannitol be present?
Mannitol is a common bulking agent that gives the cake structure. Its crystalline form depends on how it was frozen.
Does the powder's appearance prove quality?
No. Appearance is a first check; identity and purity need HPLC and MS.