Comparing E516 - Calcium sulphate vs E518 - Magnesium sulphate
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Interest over time for 6 keywords in U.S. during the last 10 years.
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Popular questions
What is gypsum used for?
In foods (E516), gypsum (calcium sulfate) is used as a stabiliser/firming and anti‑caking agent, a tofu coagulant, and to adjust brewing water; outside food it’s used for plaster, drywall, and as a desiccant.
What is gypsum board?
Gypsum board (drywall) is a building panel with a calcium sulfate core faced with paper, used for interior walls and ceilings—it's a construction use of the same mineral, not a food application of E516.
What does gypsum do for soil?
It supplies calcium and sulfate without notably changing pH, and can improve structure and water infiltration in sodic (sodium-affected) soils by displacing sodium; it has little effect on non‑sodic clays.
What is selenite good for?
Selenite is the crystalline mineral form of gypsum (calcium sulfate); it’s used like gypsum in construction materials and as a source of calcium and sulfate, including limited food uses as additive E516.
How much gypsum to add to soil?
Apply based on a soil test: typical maintenance rates are about 10–40 lb per 1,000 sq ft (50–200 g/m²) for lawns/gardens, while reclaiming sodic soils can require much more (around 1–4 tons/acre, 2–9 t/ha). Over‑application won’t fix non‑sodic clays and can add unnecessary salts.
What do epsom salts do?
In foods, magnesium sulfate (E518) acts mainly as a firming agent and magnesium nutrient; brewers also use it to adjust water chemistry, which can accentuate hop bitterness and support yeast.
Do epsom salts work?
Yes—at good manufacturing practice levels it effectively firms certain fruits and vegetables and supplies magnesium, and in brewing it reliably adjusts flavor balance and fermentation; it’s GRAS in the U.S. and authorized in the EU as E518.
How do epsom salts work?
Magnesium ions cross-link pectins and interact with proteins to improve firmness/texture, while also providing bioavailable magnesium; in brewing, sulfate/magnesium in the water can enhance hop bitterness and support yeast performance.
What is magnesium sulfate used for?
As a food additive it’s used as a firming agent in processed produce, as a magnesium nutrient supplement, and to modify brewing water chemistry; it’s permitted at levels consistent with good manufacturing practice.
What plants like epsom salts?
Plants showing magnesium deficiency—often tomatoes, peppers, and roses—may benefit because Epsom salt supplies magnesium and sulfur, but it offers little advantage in magnesium-sufficient soils and overuse can upset nutrient balance.