Description
PEG-400 from Sports Technology Labs is 60mL of USP-grade polyethylene glycol 400 in a glass bottle. It’s the clear, thick solvent our own liquid products are made with, and labs use it to turn powdered research compounds into a solution they can measure. It’s sold for laboratory research only.
What PEG-400 is
Polyethylene glycol 400 is a short-chain polyether with an average molecular weight of 380 to 420 g/mol. At room temperature it’s a colorless, slightly viscous liquid that mixes with water and dissolves many compounds that water can’t.
That makes it a standard carrier in pharmaceutical and lab work. It’s low in toxicity, chemically stable and doesn’t evaporate the way ethanol does, so a stock solution keeps its strength.
If you want the background on PEG as a vehicle, this PubMed search on PEG-400 as a solvent from the National Library of Medicine collects the published work.
How labs use PEG-400
- Weigh the powder on an analytical balance.
- Add it to a measured volume of PEG-400 in a glass container.
- Warm gently and stir until no crystals remain.
- Label the concentration and the date.
- Store capped in a cool, dark place.
The concentration is the milligrams of powder divided by the millilitres of PEG-400. 1,000mg in 50mL gives 20mg per mL; 2,000mg in 100mL gives the same.
Powders you can dissolve in it
- Ostarine Powder (MK-2866) 2g
- LGD-4033 Powder (Ligandrol) 2g
- RAD-140 Powder (Testolone) 2g
- MK-677 Powder (Ibutamoren) 2g
- Cardarine Powder (GW-501516) 2g
- S23 Powder 2g
Every pouch in our SARM powders can be made into a solution with it. Most buyers add one or two bottles to a powder order. Every category is linked from the Sports Technology Labs home page.
PEG-400 compared with other lab solvents
Water is the first choice when a compound dissolves in it, but most SARMs and many small molecules barely do. Ethanol dissolves them well, then evaporates, so the concentration creeps up every time the bottle is opened. DMSO is a strong solvent but has a smell, freezes at 18°C and carries other substances through skin, which makes it awkward to handle.
Propylene glycol behaves a lot like polyethylene glycol 400 and is sometimes mixed with it. The longer polymer chain is the reason this solvent holds more of a hydrophobic compound per millilitre and stays stable on the shelf, which is why it became the default base for liquid research compounds.
Why our liquid products use the same base
Every bottle in our liquid SARMs is made with USP-grade polyethylene glycol 400. If you buy a powder and make your own solution with this bottle, you end up with the same carrier, so results from a home-made stock and a ready-made bottle can be compared directly.
PEG-400 specifications
- Compound: polyethylene glycol 400 (macrogol 400)
- CAS number: 25322-68-3
- Average molecular weight: 380 to 420 g/mol
- Grade: USP
- Volume: 60mL glass bottle with tamper-proof seal
- SKU: STL-PEG400-60
- Intended use: laboratory research only
Storing PEG-400
Keep the bottle capped in a cool, dry place away from direct sunlight. This solvent absorbs moisture from the air, so don’t leave it open on the bench. Handle it like any lab chemical, with gloves and eye protection.
Common mistakes when making a solution
- Adding powder too fast, which leaves clumps that take ages to dissolve.
- Storing the finished solution in plastic instead of glass.
- Forgetting to write down the concentration.
- Using a balance that isn’t accurate to 0.1mg.
PEG-400 FAQ
What is PEG-400 used for?
Dissolving powdered research compounds into a liquid you can measure accurately.
How much PEG-400 is in a bottle?
60mL of USP-grade polyethylene glycol 400.
Is this solvent the same solvent used in your liquids?
Yes. Our liquid products are made in USP-grade this solvent.
Is this solvent in stock?
Yes, it’s in stock and ships free with the rest of your order.
Can I get a discount on this solvent?
Yes, crypto payments get 15% off the whole order.
Buy this solvent at Sports Technology Labs
This solvent costs $19.99 and is in stock. Add it to your cart with your powders so everything arrives together, with free worldwide shipping and 15% off when you pay in crypto. See our SARM powders and liquid SARMs for more.
Sports Technology Labs sells this product for laboratory and in-vitro research only. It isn’t a medicine, food or dietary supplement, and it must not be given to people or animals. The FDA has not evaluated any statement on this page. Buyers must be 21 or older.






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