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3632-91-5
Magnesium gluconate
3632-91-5
project | information |
Chinese name | Magnesium gluconate |
English name | Magnesium gluconate |
Molecular formula | C₁₂H₂₂MgO₁₄ |
molecular weight | 414.60 (anhydrous) |
CAS number | 3632-91-5 |
Appearance | White or off-white crystalline powder, odorless |
Solubility | Soluble in water—hot water dissolves faster |
Magnesium content | Approximately 5.8% (as Mg) – the lowest among all food magnesium sources. |
smell | Almost tasteless—extremely mild —completely imperceptible in the beverage base. |
Chinese Standards | GB 1903.x (National Food Safety Standard - Magnesium Gluconate) |
Magnesium source | Magnesium content | Flavor intensity | Performance in clear beverages |
Magnesium sulfate (E518) | ~10% | Strong bitter and salty – perceived even at low concentrations | Mineral water is acceptable—clear but slightly bitter. |
Magnesium chloride | ~12% | Extremely bitter and salty – bittern flavor | Tofu is usable—a beverage disaster |
Magnesium lactate | ~10% | Mildly acidic | Can be used – blended with fruit acids |
Magnesium gluconate | ~5.8% | Almost tasteless - best | Completely invisible—without causing any taste disturbance |
In premium clear electrolyte water, functional water, and sports drinks—where the magnesium content in the formula reaches a "meaningful" level (e.g., 20–50 mg Mg²⁺/bottle)—traditional magnesium sulfate leaves a noticeable bitter aftertaste. At this level, magnesium gluconate is completely imperceptible against the backdrop of fruit flavorings and sweeteners. Consumers only experience "post-workout mineral replenishment," without any metallic or bitter/salty taste.
Infants are several times more sensitive to taste than adults—any hint of bitterness is a signal of "refusal to drink milk" in an infant's mouth. Magnesium gluconate provides magnesium in infant formula mineral premixes—the ligands encapsulate and protect Mg²⁺—and does not catalyze fat oxidation during the 18-24 month shelf life of whole milk powder.
Unlike magnesium sulfate, which is positioned as an "economical" option in infant formula, magnesium gluconate represents a "premium and gentle" approach—it outperforms inorganic magnesium salts in every dimension (taste, oxidation catalysis, gastrointestinal tolerance). The only trade-off is higher cost—and lower magnesium content (requiring a larger powder mass to provide the same amount of magnesium). However, in the infant formula category, which is relatively insensitive to cost but extremely sensitive to safety and gentleness—this premium is worthwhile.
In the health supplement market, there exists a special category: liquid magnesium supplements. Not tablets, not powder—it's simply a bottle of magnesium water that you can drink directly. Magnesium gluconate is the only magnesium source option in this category—because it:
● Completely dissolved - the solution is transparent;
● It has no bitter taste—it can be drunk directly.
● It can be drunk on an empty stomach—it does not cause diarrhea—it does not irritate the stomach.
China's GB 14880 standard lists magnesium gluconate as a permitted source of magnesium fortification.
Food categories | Advantages of magnesium gluconate compared to other magnesium sources |
Clear electrolyte water | The only magnesium source that does not produce a bitter or salty taste at low concentrations |
Infant formula | The gentlest – not bitter + ligand protection prevents oxidation + does not irritate the stomach and intestines |
Liquid magnesium supplement | The only magnesium water that can be drunk directly on an empty stomach |
Sports recovery drinks | Stomach sensitivity after exercise – adding magnesium does not cause diarrhea – magnesium gluconate causes almost no diarrhea |
Yogurt and dairy beverages | In acidic matrices, gluconate and lactic acid coexist without conflict. |
A magnesium content of 5.8% – not a disadvantage, but a "mild strategy"
In the world of food magnesium sources—the higher the magnesium content, the faster and more concentrated the Mg²⁺ is released per unit mass—the more thoroughly it is exposed on the palate (bitter and salty) and in the gut (osmotic diarrhea). Magnesium gluconate's 5.8% magnesium content—not a failure of chemical purification—is achieved through a deliberate reduction of the Mg²⁺ density per unit mass using a high-molecular-weight ligand—allowing magnesium to be released in the mouth and intestines in a "slow, sustained release" rather than a "one-shot" manner.
In actual food formulations, magnesium gluconate can be combined with magnesium sulfate or magnesium lactate to create a "high-magnesium-content, low-cost magnesium sulfate + mild-tasting magnesium gluconate" formula. This ensures that the total magnesium concentration meets the formulation requirements while maintaining a taste acceptable to consumers.
Magnesium source | Magnesium content | Impact on food taste | Diarrhea risk | "Mildness" Ranking |
Magnesium sulfate | ~10% | Strong – prominently bitter and salty | high | The most brutal |
Magnesium chloride | ~12% | Extremely strong – bitter brine | high | rough |
magnesium oxide | ~60% | None (insoluble) | middle | Centered – Does not interfere with taste but has low absorption |
Magnesium lactate | ~10% | Low-to-slightly acidic | Extremely low | mild |
Magnesium gluconate | ~5.8% | Almost tasteless | Almost zero | The mildest |
Magnesium Gluconate occupies a unique and ultimate position in the food magnesium family: it has the lowest magnesium content—yet it is the only answer in all food scenarios that require a "non-bitter" taste.
Scene | Why magnesium gluconate? |
Clear electrolyte water | 50 mg Mg²⁺/L — Magnesium sulfate tastes bitter at this concentration — Magnesium gluconate is tasteless |
Infant formula | Infants are sensitive to bitter tastes – ligands protect against oxidation of whole milk powder fat. |
Liquid magnesium supplement | A bottle of tasteless magnesium water that you can drink directly – no diarrhea on an empty stomach |
Sports recovery drinks | Stomach sensitivity after exercise – magnesium supplementation should not cause diarrhea. |
Within the entire food-grade gluconate family—iron's gentleness is reflected in "not altering milk color," zinc's gentleness in "slightly sweetening children's beverages," copper's gentleness in "ligand protection against oxidation," and manganese's gentleness in "two-year shelf life without fat rancidity"—while magnesium's gentleness is reflected in "absolutely no bitterness." In clear water, in infant formula, and in the stomach after exercise—magnesium gluconate completes the most complex human magnesium nutrition pathway with chemically minimalist "imperceptibility."
