Amber 3 ml Glass Cartridges for Pens (10-Pack)

Amber 3 ml (300-unit) glass pen cartridges, sold in packs of 10. Same standard cartridge as our clear 3 ml cartridge - same dimensions, same 8 mm short stopper, same fit in the Gansulin pen and every other standard-cartridge instrument - but drawn from Type I amber borosilicate glass. Amber glass filters out UV and much of the blue-violet light that degrades light-sensitive research compounds, so the contents get built-in light protection the moment they leave the fridge.

Why amber: many research peptides and other lab preparations are light-sensitive, and photodegradation starts with UV and short-wavelength visible light. Clear borosilicate transmits nearly all of it; amber borosilicate blocks most light below roughly 450 nm. That matters most when a filled cartridge spends time outside a dark fridge: on a bench under lab lighting, near a window, or zipped into a travel case. For travel days especially, an amber cartridge rides in a pen or a pouch without needing to be wrapped in foil or kept in the dark.

Good for: travel and transport (the light filter rides along - no foil wrap or dark box), cartridges seated in a pen with an open dose window, bench sessions in bright or window-lit rooms, slow multi-week draw-downs, and any compound whose literature flags light sensitivity.

Just launched: this amber version is new, so its own reviews are still coming in. It is the identical cartridge build to our clear 3 ml cartridge - same glass tubing spec, cap, septum, plunger and factory - which is rated 4.8/5 across 24 reviews; only the amber tint is different.

Pick an amount: a 10-pack, or bulk packs of 100, 200 or 400 - the price per cartridge drops as the pack size goes up. Every cartridge is individually pouch-sealed.

Storage: keep cartridges sealed in their pouches in a clean, dry place at moderate room temperature, ideally below 75°F (24°C), away from high humidity. Amber glass reduces light exposure but is not a substitute for proper cold storage of a filled cartridge - follow the stability guidance for whatever the cartridge holds (typically 2-8°C, dark). The pouch is the protective barrier: do not use a cartridge if its pouch is torn, wet or damaged.

Sold for research, educational, and demonstration use only. Not a medical device and not sold as a validated-sterile clinical product; not for human or veterinary use of any kind. 21+.

Individually pouch-sealed; inspect each pouch before use.

Pairs with: the Gansulin metal pen and bacteriostatic water. Not sure you need amber? Read amber vs clear glass cartridges, or grab the standard clear 3 ml cartridge.