Research Tools

Reconstitution & Dose Calculator

Every peptide dose comes down to two formulas.

Concentration is how much peptide sits in each milliliter of solution:

• Concentration (mg/mL) = peptide amount (mg) ÷ bacteriostatic water added (mL)

Draw volume is how much solution delivers your target dose:

• Draw (mL) = desired dose (mg) ÷ concentration (mg/mL)

Worked example: a 10 mg vial reconstituted with 2 mL of water is 5 mg/mL. A 500 mcg (0.5 mg) dose is 0.5 ÷ 5 = 0.1 mL.

Insulin Syringe Conversion

U-100 insulin syringes read in units, not milliliters:

• 100 units = 1 mL
• 50 units = 0.5 mL
• 10 units = 0.1 mL
• 1 unit = 0.01 mL

So the 0.1 mL dose above is drawn to the 10-unit mark. Choosing a water volume that makes units map cleanly to your dose (for example, reconstituting so 10 units = 250 mcg) removes the need to recalculate every time.

Unit Conversions Worth Memorizing

• 1 mg = 1000 mcg (micrograms)
• 1 g = 1000 mg
• 1 mL = 100 insulin units (U-100)
• 1 IU is compound-specific—international units measure biological activity, not mass, and cannot be converted to milligrams without the compound's potency factor.

Molar Quantities

For lab work you sometimes need moles rather than mass. The number of moles equals mass divided by molecular weight:

• moles = mass (g) ÷ molecular weight (g/mol)

Molarity (mol/L) then equals moles divided by volume in liters. Molecular weight for a given peptide appears on its Certificate of Analysis and in its profile's key facts.

Reading a Certificate of Analysis (COA)

A COA is the document that tells you what is actually in the vial. Look for:

• Identity — confirmed by mass spectrometry, matching the expected molecular weight.
• Purity — usually by HPLC, expressed as a percentage; higher is better, with the impurity profile mattering as much as the headline number.
• Peptide content / net peptide — the fraction of the vial mass that is actual peptide versus counterions and water.
• Lot number and date — for traceability.

A vial without a lot-specific COA should be treated with caution.

Documentation Habits

Reproducible research depends on records, not memory. A useful log captures, per vial:

• Compound name, lot number, and COA reference
• Reconstitution date, water volume, and resulting concentration
• Storage conditions
• Each draw: date, dose, and volume
• Any observations

Scope

These tools are educational aids for understanding peptide math and documentation. They do not constitute medical advice, and the compounds discussed are largely research chemicals not approved for human use. Calculations depend on accurate inputs—always verify against the specific compound's COA.