Order DSIP 5 mg from Eternal Peptides, a top peptides supplier in the U.S. committed to consistent quality through rigorous third-party testing by leading labs. Get high-purity DSIP 10mg, verified with Certificates of Analysis and at competitive pricing. Free USPS shipping for orders above $200 with dedicated support. DSIP is sold for research use only.
Peptide Characteristics
| Property | Details |
| Name | Delta Sleep-Inducing Peptide (DSIP) |
| Sequence | Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu (WAGGDASGE) |
| Molecular Weight | 848.8 g/mol |
| Molecular Formula | C₃₅H₄₈N₁₀O₁₅ |
| PubChem CID | 68816 |
| Product Form | Lyophilized powder in sterile 5 mg vials |
| Purity | ≥99% (verified via third-party testing and lot-specific COA) |
| Storage | Store lyophilized powder at -4°F (-20°C); protect from light and moisture |
| Stability | Stable as lyophilized powder for extended periods when stored properly; reconstituted solutions should be used promptly or stored at 2-8°C for short-term use |
| Solubility | Soluble in sterile water or bacteriostatic water; typical reconstitution at 1-2 mg/mL concentration recommended for research applications |
Handling & Storage Guidelines
Proper handling and storage of DSIP are essential to maintain peptide integrity, stability, and reproducibility across research protocols. Lyophilized DSIP powder should be stored at -20°C (-4°F) in a freezer, protected from light and moisture to prevent degradation. Keep vials sealed until ready for use, and allow them to reach room temperature before opening to minimize condensation exposure.
Key handling recommendations:
- Reconstitution: Reconstitute lyophilized DSIP with sterile water, bacteriostatic water, or appropriate buffer solution. For the best stability, purity, and consistent results, get our bacteriostatic water with your DSIP order. Typical reconstitution concentrations range from 1-2 mg/mL, though this may be adjusted based on experimental requirements.
- Aliquoting: After reconstitution, divide the solution into single-use aliquots to avoid repeated freeze-thaw cycles, which can compromise peptide stability and activity. Use sterile, labeled cryovials for storage.
- Short-term storage: Reconstituted DSIP solutions can be stored at 2-8°C (36-46°F) for up to 7-14 days when using bacteriostatic water. For sterile water reconstitutions, use within 72 hours or freeze immediately.
- Long-term storage: For extended storage, keep reconstituted aliquots at -20°C (-4°F) or -80°C (-112°F) for optimal stability. Avoid storing reconstituted peptides at -20°C for periods exceeding 1-2 months; -80°C is preferable for longer durations.
- Freeze-thaw precautions: Minimize freeze-thaw cycles to no more than 2-3 times, as repeated temperature fluctuations can cause aggregation and loss of peptide activity.
- Laboratory safety: Handle DSIP using standard laboratory practices, including appropriate personal protective equipment (gloves, lab coat, eye protection). Follow institutional biosafety guidelines and chemical handling protocols. Dispose of peptide waste according to your facility’s hazardous waste management procedures.
COA / Quality Assurance
Eternal Peptides provides comprehensive Certificates of Analysis (COAs) for every DSIP production lot, ensuring transparency, traceability, and confidence in product quality. These COAs support reproducible research outcomes and facilitate regulatory compliance for institutional audits and documentation requirements.
Each lot-specific COA includes:
- Peptide identity verification: Confirmed through High-Performance Liquid Chromatography (HPLC) and mass spectrometry analysis to ensure the correct peptide sequence and molecular weight.
- Purity assessment: Quantitative purity determination, typically ≥99%, measured via analytical HPLC with detailed chromatogram data showing the absence of significant impurities or degradation products.
- Sterility testing: Microbiological testing to confirm the absence of bacterial and fungal contamination in lyophilized products.
- Endotoxin levels: Bacterial endotoxin quantification via Limulus Amebocyte Lysate (LAL) assay, ensuring levels are within acceptable limits for research-grade materials.
- Storage and stability recommendations: Specific guidance on optimal storage conditions and expected shelf life for both lyophilized and reconstituted forms.
- Appearance and physical characteristics: Visual inspection results and physical property verification.
Eternal Peptides partners with independent third-party laboratories, including Janoshik, Finnrick Analytics, and other leading analytical facilities, to conduct rigorous testing that meets or exceeds industry standards. All COAs are accessible through the Lab Tests page on the Eternal Peptides website.
Legal / Regulatory Disclaimer
DSIP is supplied strictly for laboratory research purposes only and is not approved by the FDA or any regulatory authority for human use, veterinary use, clinical administration, therapeutic applications, or diagnostic procedures.
The safety, efficacy, and pharmacological properties of DSIP in humans have not been established through controlled clinical trials. This product is intended solely for qualified researchers working in appropriately equipped laboratory facilities under institutional oversight.
Purchasers are solely responsible for ensuring compliance with all applicable federal, state, and local laws, as well as institutional biosafety policies, animal care regulations, and research-use guidelines governing their jurisdiction and research setting.
Eternal Peptides does not advocate, support, or condone any non-research use of this product. By purchasing DSIP, researchers acknowledge their responsibility for lawful, ethical, and compliant use in legitimate scientific investigation.
Always quality-tested, verified with third-party COAs
At every step, we prioritize quality by conducting rigorous third-party testing on all our products. These tests focus on five key characteristics — identity, purity, sterility, endotoxin levels, and heavy metal content — ensuring that each product meets the highest standards of quality, with independent third-party Certificates of Analysis (COAs) to verify our commitment to excellence.
Identity Test
Identity testing ensures that the product contains the correct ingredient as labeled, verifying its authenticity and matching it to established reference standards.
Purity Test
Purity and concentration testing verifies that the ingredient is present in the correct amount, with a purity of 99% or higher to meet stringent quality standards.
Sterility Test
Sterility testing ensures that the product is completely free from bacteria, fungi, and other microorganisms.
Endotoxin Test
Endotoxicity testing specifically detects and quantifies lipopolysaccharides (LPS), components of bacterial cell walls, to ensure the product is free from endotoxins.
Heavy Metals Test
Heavy metals testing ensures that the product is free of heavy metals such as lead, arsenic, mercury, cadmium, and other heavy metals.
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