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Lyophilized form helps protect peptide quality. Peptides are supplied as a dry powder, which may look like a compact "puck" or a lighter powder inside the vial.
Because the peptide is dry, it does not require refrigerated shipping during normal transit, including warm seasonal conditions. For longer storage, follow the storage guidance in the product description.
Appearance can vary. The stated peptide content is checked through third-party analysis.
Read more in the product description.
Solution not bundled
Peptides are delivered as lyophilized powder. This dry form helps preserve peptide quality during storage and transport and does not require refrigerated shipping during normal transit.
To prepare a solution, use a solvent such as Bacteriostatic water. It is sold separately, so add it only when you need it for peptide preparation.
Read more in the product description.
Neuroregulatory peptide
DSIP
In stock
DSIP is a peptide made of nine amino acids. Published studies look at brain signals, metabolism, low-oxygen models, and receptor-related measurements.
MassQuantity
55,50 €55,50 €
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DSIP · 1 vial155,50 €55,50 €
DSIP
55,50 €
Delta sleep-inducing peptide for neuropeptide, circadian, and stress-pathway studies.
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Research overview
DSIP
DSIP means delta sleep-inducing peptide and refers to a defined nine-amino-acid sequence. Its short sequence supports controlled identity and signalling studies.
Studies include brain recordings, pain-model endpoints, metabolism, low-oxygen conditions, and cell growth. Each report applies only to its own laboratory system.
Brain-signal and receptor studies
Studies examine EEG-related observations and opioid- and GABA-related signalling. They also measure behaviour and brain chemistry in controlled models.
The original study explains what was measured and what its limits are.
Metabolic and cellular models
Other work covers low-oxygen, metabolic, muscle, and cell-growth models. Exact sequence, controls, and test conditions are important when comparing these different studies.
Compound information
Specifications
Molecular profile
Sequence
Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu
Molecular mass
848.82 g/mol
CAS number
62568-57-4
Molecular formula
C35H48N10O15
Material record
Physical appearance
White to off-white lyophilized powder
Solubility
Soluble in bacteriostatic water and suitable aqueous laboratory solvents.
Product note
Delta sleep-inducing peptide; supplied strictly for research use only.
Laboratory care
Handling
Peptides in transport
Peptides in lyophilized form are supplied in glass vials by standard shipping methods and do not require refrigeration. Short-term temperature fluctuations during transport will not reduce their quality and efficacy. Even at high summer temperatures, the peptides in lyophilized form are stable for several weeks.
Storage of lyophilized peptides
Lyophilized peptides should be stored in a dry place, protected from light and moisture. The following storage conditions are generally recommended:
Room temperature (15–25 °C): Up to 3 months
Refrigerated (2–8 °C): Up to 6 months
Frozen (-20 °C or below): 3–5 years (recommended for long-term storage)
Allow the vial to reach room temperature after taking it out of the refrigerator or freezer.
Storage of reconstituted peptides
Once reconstituted, peptide solutions are generally less stable than their lyophilized form and should be stored under refrigerated conditions whenever possible.
The following storage conditions are generally recommended:
Room temperature (15–25 °C): Avoid prolonged storage
Refrigerated (2–8 °C): Typically 4–8 weeks
Frozen (-20 °C or below): Up to 3–4 months
To preserve peptide integrity, avoid repeated freeze–thaw cycles, as these may accelerate peptide degradation.
Important: Most manufacturers recommend discarding reconstituted peptides within 4 weeks when stored at 2–8 °C. This recommendation is intentionally conservative and may not reflect the actual chemical stability of every peptide. In our own stability studies, many peptides reconstituted in bacteriostatic water showed no detectable degradation after 12 weeks of refrigerated storage. As peptide stability is highly sequence- and formulation-dependent, this result should not be extrapolated to all peptides without supporting stability data.
Analytical documentation
Latest test results
Latest published result
Liquilabs s.r.o.Signed Certificate of Analysis · 10mg
99.7%Purity by HPLC
Batch number
2028399
Tested
2026-09-08
Recorded QC panel
AssayPeptide Screening 0.1% TFA
14.13 mg (± 0.07 mg)
PurityPeptide Screening 0.1% TFA
99.7%
Identity (FTIR)Peptide Screening 0.1% TFA
983 (± 5)
Identity (RT)Retention time
0.992 (± 0.005)
Bacterial endotoxinUSP 85 / Eur. Ph. 2.6.14
0.335 EU/mg
These are the latest published results for this strength. The batch number is printed on each vial. Your supplied batch is confirmed against the matching published record when your order is allocated.
Decreased concentrations of delta-sleep inducing peptide in plasma and cerebrospinal fluid from depressed patients: Nordisk Psykiatrisk Tidsskrift: Vol 39, No sup11
Delta sleep-inducing peptide (DSIP): An overview of central actions and possible relationship to psychiatric illnesses: Nordisk Psykiatrisk Tidsskrift: Vol 42, No 2
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