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Buyer guide

DMEM Powder: What You Add at Reconstitution and How a 100 L Pack Converts to Litres

A lab that goes through several litres of DMEM a week pays most of its medium budget for water, cold freight and fridge space. One pack of high-glucose DMEM powder makes 100 L and keeps for 48 months at 2 to 8 °C. The same formulation as a 500 mL liquid bottle keeps for 12 months. This page is for distributors, resellers and procurement buyers deciding between them: what the pack contains, what it leaves out, what the end user adds, and when powder does not pay.

Buying for resale, private label or bulk supply? Email [email protected] or use the quote form to request a wholesale quote — our team replies within one business day with pack options and wholesale pricing.

The business case in one table

DMEM powderDMEM liquid bottle
PackPowder for 100 L500 mL
Glucose4.5 g/L4.5 g/L
L-glutamine4 mM4 mM
Sodium pyruvate0.11 g/L0.11 g/L
Phenol redIncludedIncluded
HEPESNot includedNot included
Sodium bicarbonateNot included: you add itReady to use
SterilityNot listed; filter after reconstitutionFilter-sterilised
Shelf life48 months12 months
Storage2 to 8 °C, protected from light2 to 8 °C, protected from light
Shipping classBlue iceBlue ice
Raw materialsAnimal origin-freeAnimal origin-free
EndotoxinNot more than 1 EU/mLNot more than 1 EU/mL
  • Volume. One 100 L pack makes the volume of two hundred 500 mL bottles.
  • Cost. The pack lists for about the price of twenty-two of those bottles, so the powder itself costs a little over a tenth of the same volume bought as liquid. That is the price of the powder only: bicarbonate, water, filters and staff time come on top.
  • Same formulation. The powder and this bottle list the same glucose, glutamine and pyruvate levels, with phenol red and without HEPES, so moving from one to the other does not change the recipe your cells see.
  • Shelf life. The powder carries 48 months against 12 months for the liquid, so a pack can sit in storage four times as long before it is opened.
  • Cold chain. Both ship on blue ice and both need fridge space; the powder is not an ambient-storage item. The difference is bulk: one pack of powder against two hundred bottles of liquid.

A viewer comment under a video on making DMEM puts the condition plainly: it is more cost efficient if you already have what is needed to make it.

What is in the pack, and what is not

The pack lists phenol red, 4.5 g/L D-glucose, 4 mM L-glutamine and 0.11 g/L sodium pyruvate. It is listed without sodium bicarbonate and without HEPES. Our DMEM reference page gives the standard bicarbonate addition as 3.7 g/L at reconstitution. Serum is not in any basal medium and is a separate purchase; the listing names 10% FBS as the usual serum level. For the choice between glucose levels, phenol red and HEPES, see our guide to choosing DMEM; this page stays with the powder as a purchase.

Do not read the pH or osmolality of the dry-pack listing as the values of finished medium; ask us for the lot data and we tell you what is available for that lot.

Variants you cannot get as this powder

The powder is one formulation. If your protocol needs another, the liquid range covers it.

Liquid DMEM, 500 mLGlucosePyruvateHEPESPhenol redShelf life
High glucose, glutamine, pyruvate4.5 g/L0.11 g/LNoYes12 months
High glucose, modified formulation4.5 g/LYesNoYes12 months
High glucose, no pyruvate4.5 g/LNoNoYes12 months
High glucose with HEPES4.5 g/LNoYesYes12 months
High glucose with HEPES, no phenol red4.5 g/LNoYesNo12 months
Glucose-freeNoneNoNoYes12 months
Low glucose1.0 g/L0.11 g/LNoYes12 months

A lab that needs phenol red-free, low-glucose or glucose-free DMEM buys liquid. A lab that needs HEPES can add it to medium made from the powder: HEPES is listed as a sterile 1 M solution in 100 mL and as a 1 kg powder that stores at 2 to 30 °C and ships at room temperature. For large volumes the bulk powder, titrated in-house, is substantially cheaper per mole than the sterile solution.

Check the name on the order: the powder family

Four basal powders come as 100 L packs with the same 48 month shelf life, the same 2 to 8 °C storage and the same blue ice shipping.

Powder, 100 L packListed additionsListed as without
DMEM, high glucosePhenol red, 4.5 g/L glucose, 4 mM glutamine, 0.11 g/L pyruvateSodium bicarbonate, HEPES
RPMI 1640Phenol red, 2.0 g/L glucose, 300 mg/L glutamineHEPES
MEM with Earle's saltsPhenol red, 1.0 g/L glucose, 2 mM glutamine, non-essential amino acidsNothing listed
M199 with Earle's saltsPhenol red, glutamineSodium bicarbonate, HEPES

Three of the four carry the same list price and pack size, so a wrong line on a purchase order is easy to miss until a 100 L pack of the wrong medium arrives. Where a listing does not say whether bicarbonate is included, ask us before you plan the batch.

From pack to medium: the checklist

  1. Water. Use high-purity, low-endotoxin water; the reference page gives the resistivity to aim for.
  2. Dissolve. Make up the powder for the batch volume you planned and mix until clear.
  3. Add sodium bicarbonate. The pack ships without it; our DMEM reference page gives 3.7 g/L for the standard formulation.
  4. Adjust pH slightly below target. The pH rises during filtration, so set it a little low.
  5. Sterilise by filtration, not by autoclave. A supplier video on preparing sterile media covers when to sterile filter the complete medium, and a second video shows medium being prepared from powder the same way.
  6. Add serum and antibiotics as supplements. The same supplier video groups serum, amino acids and antibiotics as the supplements added to basal medium.
  7. Keep the hood routine tight. A commenter on a DMEM preparation video lists what the demonstration skipped: loading the cabinet, and wiping down the filter unit, the serum bottle and the antibiotics before they go in.
  8. Label an in-house expiry and store dark. Once glutamine is in solution, treat the medium as having a working life of about four weeks at 2 to 8 °C, protected from light, as our DMEM reference page states.

When powder pays, and when it does not

The 48 months belongs to the dry pack; the medium you make from it has a short working life. So the decision is about turnover: powder pays when the lab uses each batch within its working life and has the water system, filters and hands to make it. A lab that uses a few bottles a month is better served by the 500 mL liquid with its 12 month shelf life. A core facility that supplies several groups can make medium in batches and still hold the unopened powder for years.

Mistakes that cost money

  • Treating the powder as ready medium. It is listed without sodium bicarbonate and must be dissolved, completed and filtered.
  • Reading the pack price as the price of finished medium. The saving holds only if the lab already has what it takes to make it.
  • Ordering 100 L for a low-volume lab. The liquid's 12 months suits slow use better than batches of made-up medium.
  • Ordering the wrong powder. DMEM, RPMI 1640 and MEM powders share one pack size and one list price.
  • Expecting HEPES or a phenol red-free medium from this pack. Neither is in this powder; both exist as liquid.
  • Planning ambient storage. The powder is a 2 to 8 °C item and ships on blue ice.

Request a wholesale quote

Email [email protected] to request a wholesale quote or bulk pricing for DMEM powder in 100 L packs. Tell us:

  • packs per quarter, or litres of medium per month;
  • the delivery country;
  • whether you also need HEPES, serum or liquid bottles on the same order;
  • whether you buy for resale, private label or your own use.

Ask us for the lot data and we tell you what is available for that lot. Ask about a trial quantity.

Products covered in this guide

CCM-CM-0004High-Glucose DMEM with L-Glutamine and Pyruvate, 500 mL500 mLView product →CCM-CM-0006High-Glucose DMEM with Phenol Red and L-Glutamine500 mLView product →CCM-CM-0007High-Glucose DMEM with Phenol Red, Glutamine and HEPES500 mLView product →CCM-CM-0009High-Glucose DMEM with Phenol Red, No Glutamine or Pyruvate500 mLView product →CCM-CM-0011Low-Glucose DMEM with Phenol Red, Glutamine and Pyruvate500 mLView product →CCM-CM-0017DMEM/F-12 (1:1) Medium with Phenol Red, L-Glutamine and HEPES500 mLView product →

Reference pages on this topic

  • DMEM (Dulbecco's Modified Eagle Medium)DMEM (Dulbecco's Modified Eagle Medium) is a basal cell culture medium derived from Eagle's Minimal Essential Medium by raising the amino acid and vitamin concentrations roughly fourfold. It is supplied in high-glucose (4,500 mg/L, 25 mM) and low-glucose (1,000 mg/L, 5.6 mM) forms, buffered with 3,700 mg/L sodium bicarbonate, and requires serum or a defined supplement plus a CO2 atmosphere to hold physiological pH. DMEM is the default medium for adherent lines such as HEK293, HeLa, NIH/3T3, Vero and CHO-derived adherent cultures, and for most primary fibroblasts.
  • Phenol Red in Cell Culture MediaPhenol red (phenolsulfonphthalein) is a pH indicator added to cell culture media at roughly 5-15 mg/L, where it turns yellow below about pH 6.8 and pink to fuchsia above about pH 8.2, with the normal red-orange of healthy medium sitting near pH 7.4. Medium turning yellow means acidification - almost always lactate from cell metabolism, from an overgrown culture or from bacterial contamination - while medium turning pink or purple means the medium has gone alkaline, nearly always because CO2 has escaped from the bicarbonate buffer. Phenol red does no buffering itself and is purely diagnostic; use phenol-red-free medium for fluorescence and absorbance assays, and for oestrogen-responsive cell work, where the dye interferes with the readout.
  • EMEM vs DMEM: What the Modification Actually ChangedEMEM (Eagle's Minimum Essential Medium, also sold as MEM) and DMEM (Dulbecco's Modified Eagle Medium) are the same medium one generation apart: DMEM is Eagle's formulation enriched, with roughly four times the vitamins, about twice most amino acids, twice the glutamine, added glycine and serine, ferric nitrate, and 3.7 g/L sodium bicarbonate against EMEM's 1.5-2.2 g/L. The practical consequence is that DMEM supports fast-growing, metabolically demanding lines such as HEK293 and NIH/3T3, while EMEM suits slower, less demanding adherent cells and primary lines - and because DMEM's higher bicarbonate is formulated for 10% CO2 while EMEM's suits 5%, the two are not interchangeable without checking your incubator.
  • RPMI 1640 MediumRPMI 1640 is a basal cell culture medium developed at Roswell Park Memorial Institute in 1966 for the culture of human leukocytes in suspension. It contains 2,000 mg/L glucose (11.1 mM), 2,000 mg/L sodium bicarbonate (23.8 mM) buffered for a 5% CO2 atmosphere, unusually high phosphate (about 5.6 mM), low calcium (about 0.42 mM), and a distinctive component set that includes reduced glutathione, biotin, vitamin B12, para-aminobenzoic acid and hydroxyproline. It is the standard medium for lymphocytes, hybridomas, and most suspension-adapted haematopoietic and lymphoid cell lines, normally supplemented with 10% fetal bovine serum.
  • PBS vs DPBS: What Is Different, and Which One to UsePBS and DPBS are both phosphate-buffered saline solutions; the difference is the recipe, not the function. Dulbecco's formulation (DPBS) adds potassium chloride and carries roughly twice the phosphate of a typical PBS (about 9.5 mM versus about 4 mM), and it is sold in two versions - with calcium and magnesium, and without. In practice the with-or-without-divalent-cations choice matters far more than the PBS-or-DPBS label: use a calcium- and magnesium-free solution to wash cells before trypsinisation or EDTA dissociation, because Ca2+ and Mg2+ support the cadherin and integrin bonds you are about to break, and use the version containing calcium and magnesium when cells must stay attached and intact through the wash.
  • Bovine Serum in Cell CultureBovine serum is the liquid fraction of clotted cattle blood, added to culture medium at 5-10% to supply growth factors, hormones, transport and attachment proteins, lipids and trace elements that basal media do not contain. Fetal bovine serum (FBS) and fetal calf serum (FCS) are two names for the same product, collected from the fetus at slaughter of pregnant cows; newborn calf serum comes from calves under about 20 days old and donor bovine serum from controlled donor herds aged roughly 12-36 months, both containing more immunoglobulin and fewer growth factors than FBS. Because serum is an undefined biological material with substantial lot-to-lot variation, unresolved animal welfare questions and a volatile supply chain, defined serum-free and animal-origin-free media are increasingly preferred where the cell line will tolerate them.

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