Worked example
Add 2 mL of water to a vial holding 5 mg of CJC-1295. The concentration is 5 ÷ 2 = 2.5 mg/mL, or 2,500 mcg in every millilitre. On a U-100 syringe, where 100 units make 1 mL, each unit holds 25 mcg and each 10 units hold 250 mcg.
Change the water and only the concentration changes. With 4 mL instead, each 10 units hold 125 mcg, half as much, and any given mass takes twice the units to measure. These numbers illustrate the arithmetic; they are not amounts to use.
Concentration table
Per-component concentration for the label split above. Each component is diluted by the same water volume. The last column is what 10 units on a U-100 syringe hold.
| Vial | Water | Concentration | 10 units (U-100) hold |
|---|---|---|---|
| 5 mg | 1 mL | 5 mg/mL | 500 mcg |
| 5 mg | 2 mL | 2.5 mg/mL | 250 mcg |
| 5 mg | 3 mL | 1.667 mg/mL | 166.7 mcg |
Notes for CJC / Ipa vial math
- Check which CJC-1295 the label means. "CJC-1295 with DAC" carries a drug affinity complex that binds albumin and lasts days; "CJC-1295 no DAC" (also sold as Mod GRF 1-29) lasts minutes. They are different molecules with similar names, and the vial math cannot tell them apart.
- In a 5 mg + 5 mg vial with 2 mL of water, each component is 2,500 mcg/mL, so 10 U-100 units hold 250 mcg of each. The two always come out together in the label ratio.
- For separate vials, set the blend to one component or use the main calculator.
Storage and handling
- No approved label or validated in-use stability data exists for either peptide.
- General practice: refrigerate reconstituted vials (2-8 °C), avoid freezing, protect from light, label with date and per-component concentration.