Materials and syringes, peptide guide

Required materials

Alcohol prep pads
Bacteriostatic water (or peptide-specific solvent, e.g. acetic acid for AOD-9604)
Clean 29-31 gauge syringes (sized to the dose volume)

Optional materials

22-23 gauge, 3 mL syringe for reconstitution
Light-blocking, moisture-preventing storage container

Syringe sizing reference

1 mL / 1 cc / 100-unit. Best for: Doses over 10 units. Tick: 2 units per tick. Cannot accurately measure single-unit doses.
0.5 mL / 0.5 cc / 50-unit. Best for: Single-unit doses under 10 units. Tick: 1 unit per tick.
0.3 mL / 0.3 cc / 30-unit. Best for: Single-unit doses (2, 5, 7 units...). Tick: 1 unit per tick.
3 mL reconstitution. Best for: Reconstitution (22-23 gauge). Tick: 0.1 mL per short tick, 0.5 mL per numbered line.
10 mL Luer Lock. Best for: Lemon Bottle / large-volume use. Tick: Needle sold separately.

Needle gauge reference

Dosing range: 29-31 gauge
Reconstitution: 27 gauge typical
SQ needle lengths: 5/16" (8 mm) or 1/2" (12 mm); 1/2" is max for SQ

Configurations reported in the literature:

Reported for the smallest volumes: 29-31 gauge, 0.3 mL / 30-unit, 5/16" (8 mm) tip
Reported for larger volumes: 29-31 gauge, 1 mL / 100-unit, 5/16" (8 mm) or 1/2" (12 mm) if mixing SQ + IM

Frequently asked questions

What materials are reported for peptide handling in research settings?

Reported practice involves alcohol prep pads, bacteriostatic water or a peptide-specific solvent, and clean 29-31 gauge syringes appropriate to the volume being measured. A 22-23 gauge 3 mL syringe for the reconstitution draw and a light-blocking storage container are also commonly described.

How does syringe barrel size relate to measurement precision?

Resolution falls as barrel volume rises. A 0.3 mL barrel resolves the smallest volumes most finely; 0.5 mL and 1 mL barrels cover larger volumes at coarser resolution, and a 1 mL barrel cannot resolve the smallest volumes accurately. This is a property of the graduations, not a recommendation about what any person should use.

What needle gauges are reported for subcutaneous administration?

29 to 31 gauge is typical for subcutaneous administration in the reported literature, commonly with a 5/16 inch (8 mm) tip; 27 gauge is typical for the reconstitution draw. Gauge selection for any human use is a matter for a qualified clinician, not for this reference.

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