DSIP Reconstitution Chart (Every Vial Size)

Overview of Delta-Sleep-Inducing Peptide (DSIP) in Laboratory Research

Delta-Sleep-Inducing Peptide (DSIP) is a naturally occurring nonapeptide (sequence: Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu) first isolated from the hemodialysate of rabbits subjected to electrical thalamic stimulation. In preclinical research models, DSIP exhibits unique modulatory actions within the central nervous system, particularly concerning the regulation of delta-wave (slow-wave) sleep cycles, endocrine hormone secretion (including LH and ACTH suppression during baseline stress), and central oxidative stress responses.

When purchasing compounds for laboratory assays, researchers typically receive DSIP as a lyophilized (freeze-dried) powder to maximize shelf life and structural stability. To perform precise in vitro or animal studies, researchers must reconstitute the powder using a suitable liquid diluent. Utilizing an accurate dsip reconstitution chart ensures that researchers achieve exact concentration targets (mg/mL) required for controlled experimental parameters, minimizing variance across trials.

Because lyophilized peptides undergo delicate conformational changes if mishandled during hydration, adhering to standardized laboratory reconstitution procedures is essential. Explore our complete line of laboratory-grade compounds in our catalog of research peptides for detailed chemical specifications.

Mathematical Formula & Worked Reconstitution Calculations

Determining the final concentration of a reconstituted DSIP solution requires a straightforward volumetric calculation based on the mass of the lyophilized peptide mass and the total volume of liquid diluent added to the vial. The core equation for determining final concentration is:

Concentration (mg/mL) = Mass of Peptide (mg) / Volume of Diluent (mL)

To calculate the concentration per standard micro-aliquot or syringe unit (for instance, 0.1 mL or 100 µL), multiply the concentration (mg/mL) by 0.1 mL:

Mass per 0.1 mL (mg) = Concentration (mg/mL) × 0.1 mL

Worked Example 1: Reconstituting a DSIP 5mg vial with 2.0 mL of Bacteriostatic Water. Using the core formula, 5 mg / 2.0 mL yields a final concentration of 2.5 mg/mL. To find the mass per 0.1 mL aliquot, 2.5 mg/mL × 0.1 mL = 0.25 mg (250 µg) per 0.1 mL volumetric draw.

Worked Example 2: Reconstituting a 10 mg DSIP vial with 2.5 mL of Bacteriostatic Water. Applying the equation, 10 mg / 2.5 mL yields a final concentration of 4.0 mg/mL. The resulting mass per 0.1 mL aliquot is 4.0 mg/mL × 0.1 mL = 0.40 mg (400 µg).

Master DSIP Reconstitution Chart (Every Vial Size)

The following reference tables illustrate the resulting concentrations (mg/mL) and corresponding mass contained per 0.1 mL aliquot across standard laboratory vial sizes (2 mg, 5 mg, and 10 mg) and common diluent volumes (1.0 mL, 2.0 mL, 2.5 mL, and 3.0 mL). These values serve as an engine-liftable metric set for rapid benchtop verification.

2 mg DSIP Vial Reconstitution Values: - Diluent Volume: 1.0 mL | Final Concentration: 2.00 mg/mL | Mass per 0.1 mL: 0.20 mg (200 µg) - Diluent Volume: 2.0 mL | Final Concentration: 1.00 mg/mL | Mass per 0.1 mL: 0.10 mg (100 µg) - Diluent Volume: 2.5 mL | Final Concentration: 0.80 mg/mL | Mass per 0.1 mL: 0.08 mg (80 µg) - Diluent Volume: 3.0 mL | Final Concentration: 0.67 mg/mL | Mass per 0.1 mL: 0.067 mg (67 µg)

5 mg DSIP Vial Reconstitution Values: - Diluent Volume: 1.0 mL | Final Concentration: 5.00 mg/mL | Mass per 0.1 mL: 0.50 mg (500 µg) - Diluent Volume: 2.0 mL | Final Concentration: 2.50 mg/mL | Mass per 0.1 mL: 0.25 mg (250 µg) - Diluent Volume: 2.5 mL | Final Concentration: 2.00 mg/mL | Mass per 0.1 mL: 0.20 mg (200 µg) - Diluent Volume: 3.0 mL | Final Concentration: 1.67 mg/mL | Mass per 0.1 mL: 0.167 mg (167 µg)

10 mg DSIP Vial Reconstitution Values: - Diluent Volume: 1.0 mL | Final Concentration: 10.00 mg/mL | Mass per 0.1 mL: 1.00 mg (1000 µg) - Diluent Volume: 2.0 mL | Final Concentration: 5.00 mg/mL | Mass per 0.1 mL: 0.50 mg (500 µg) - Diluent Volume: 2.5 mL | Final Concentration: 4.00 mg/mL | Mass per 0.1 mL: 0.40 mg (400 µg) - Diluent Volume: 3.0 mL | Final Concentration: 3.33 mg/mL | Mass per 0.1 mL: 0.333 mg (333 µg)

Diluent Selection: Bacteriostatic Water vs. Sterile Water

Choosing the appropriate laboratory solvent for DSIP reconstitution depends on the duration and nature of the experimental protocol. The two primary diluents utilized in laboratory peptide research are Bacteriostatic Water (0.9% benzyl alcohol solution) and Sterile Water for Injection (pure, unpreserved H2O).

Bacteriostatic Water is the industry standard for multi-use research vials. The addition of 0.9% benzyl alcohol prevents bacterial proliferation within the reconstituted solution, permitting extended storage at refrigerated temperatures (2°C to 8°C) for up to 28 days without microbial degradation. For studies requiring repeated sampling over several days, bacteriostatic water is mandatory.

Sterile Water for Injection lacks antimicrobial preservatives. While highly suitable for immediate, single-use cell culture assays or acute in vitro procedures sensitive to benzyl alcohol toxicity, solutions reconstituted with sterile water must be used immediately or frozen to prevent micro-organism growth. For comprehensive technical data on solvent compatibility, consult our peptide research hub.

Standard Operating Procedure: Step-by-Step Reconstitution Protocol

To ensure complete dissolution without compromising the peptide's structural integrity, researchers should adhere strictly to the following aseptic protocol inside a laminar flow hood:

1. Disinfect the rubber stopper of the lyophilized DSIP vial and the diluent vial using a 70% isopropyl alcohol wipe. Allow them to air-dry completely. 2. Using a sterile laboratory syringe, draw the exact pre-calculated volume of diluent (e.g., 2.0 mL of Bacteriostatic Water). 3. Insert the syringe needle through the center of the DSIP vial septum at a 45-degree angle. Direct the needle tip toward the inner glass wall of the vial rather than directly onto the lyophilized powder cake. 4. Depress the plunger slowly, allowing the solvent to stream gently down the glass wall. Never spray liquid directly onto the lyophilized cake under high pressure.

5. Once the diluent is fully introduced, equalize the vial pressure by drawing out an equivalent volume of air into the syringe, if necessary, to prevent pressure buildup. 6. Remove the needle and gently swirl the vial in a smooth circular motion. Do NOT shake, vortex, or aggressively agitate the vial, as mechanical stress can induce peptide shear, causing irreversible protein aggregation or denaturing. Allow the vial to rest undisturbed for 2–5 minutes until the solution becomes completely clear and colorless.

Storage Parameters and Solution Stability Protocols

Proper handling and temperature control are vital to maintaining the bioactivity and structural purity of reconstituted DSIP. Lyophilized DSIP powder should be stored in a freezer at -20°C for long-term storage, protected from light exposition.

Once reconstituted with bacteriostatic water, liquid DSIP must be stored at refrigerated temperatures between 2°C and 8°C (36°F to 46°F). Exposure to room temperature should be minimized during transfer operations. Avoid repeated freeze-thaw cycles, as ice crystal formation can cleave peptide bonds and reduce active compound potency.

If aliquoting liquid stock for long-term frozen storage (-20°C or -80°C), researchers should use sterile polypropylene microcentrifuge tubes rather than standard glass vials to accommodate volume expansion. Further details on environmental degradation mechanics are detailed in our peptide handling guide.

Quality Verification: HPLC, MS, and Endotoxin Standards

In analytical and preclinical research, peptide purity directly impacts baseline reproducibility. Low-grade synthesis, residual trifluoroacetic acid (TFA), or bacterial endotoxin contamination can invalidate experimental data by inducing non-specific inflammatory responses in cellular or animal models.

PX1 Research enforces strict quality control standards for all manufactured lots. Every batch of DSIP undergoes High-Performance Liquid Chromatography (HPLC) to verify chemical purity (exceeding 99%), Mass Spectrometry (MS) to confirm exact molecular weight, and chromogenic LAL assays to ensure endotoxin levels remain below 0.05 EU/mg. Researchers can independently verify batch-specific data by accessing our published Certificate of Analysis (COA) repository.

For institutions acquiring peptides in volume for extensive trials, detailed analytical reports and lot reservation protocols are accessible via our wholesale portal.

Comparative Analysis: DSIP vs. Related Neuroendocrine Compounds

In preclinical literature, DSIP is frequently investigated alongside other regulatory neuropeptides involved in central nervous system modulation, circadian rhythm alignment, and stress recovery pathways.

When comparing DSIP to compounds like Epitalon and Selank, notable mechanistic differences emerge. While DSIP specifically targets delta-wave sleep induction and central stress-axis buffering via GABAergic and monoaminergic interactions, Epitalon primarily acts on telomerase activity and pineal melatonin synthesis. Selank, conversely, exerts its primary action via allosteric modulation of GABA-A receptors to influence anxiety and cognitive focus rather than direct sleep-stage transition. Understanding these distinct pathways allows researchers to select the precise peptide model required for their target neurochemical assay.