Comparing E170II - Calcium hydrogen carbonate vs E330 - Citric acid

Overview

E170II - Calcium hydrogen carbonate

Calcium hydrogen carbonate (E170II) is the dissolved, bicarbonate form of calcium that occurs when carbon dioxide mixes with calcium carbonate in water. It shows up naturally in “hard” water and can be present in some drinks where minerals are balanced for taste and stability. It doesn’t exist as a stable powder; when water is heated or the carbon dioxide escapes, it turns back into ordinary calcium carbonate.

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E330 - Citric acid

Citric acid (E330) is a tart, sour-tasting acid found naturally in citrus fruits and used widely in foods and drinks. It helps control acidity, keeps flavors bright, and protects color and freshness in many products.

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Synonyms
E170ii
Calcium hydrogen carbonate
Calcium bicarbonate
Calcium acid carbonate
E330
Citric acid
Functions
acidity regulatorraising agent
acidity regulatorsequestrant
Origins
Synthetic
Mineral
Plant
Microbiological
Products

Found in 5 products

Found in 95,503 products

Search rank & volume
#2751.2K / mo🇺🇸U.S.
#1996.8K / mo🇺🇸U.S.
Awareness score

×18.04
over-aware

×0.15
under-aware

Search volume over time

Interest over time for 4 keywords in U.S. during the last 10 years.

Interest over time for 2 keywords in U.S. during the last 10 years.

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Popular questions

  1. How does calcium carbonate neutralize stomach acid?

    Calcium hydrogen carbonate (E170ii) neutralizes stomach acid via an acid–base reaction: Ca(HCO3)2 + 2 HCl → CaCl2 + 2 CO2 + 2 H2O, raising gastric pH.

  2. When calcium carbonate is added to hydrochloric acid?

    Calcium hydrogen carbonate reacts with hydrochloric acid to effervesce (release CO2) and form calcium chloride and water: Ca(HCO3)2 + 2 HCl → CaCl2 + 2 CO2 + 2 H2O.

  3. How does calcium carbonate neutralize acid?

    Its bicarbonate ions consume H+ to form carbonic acid, which decomposes to CO2 and water, leaving a neutral calcium salt (e.g., CaCl2).

  4. Why does calcium carbonate dissolve in acid?

    Acidic H+ converts carbonate/bicarbonate into CO2 and water, removing carbonate from the solid and driving dissolution; calcium hydrogen carbonate itself is soluble in water.

  5. How does calcium carbonate reduce acid rain?

    Calcium hydrogen carbonate isn’t used to prevent acid rain, but carbonate/bicarbonate alkalinity neutralizes acidic waters; industrially, limestone or lime (not Ca(HCO3)2) scrubs SO2 from flue gases, reducing acid‑rain precursors.

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  1. Is citric acid bad for you?

    At typical food levels, citric acid (E330) is considered safe by major regulators (GRAS; EFSA/JECFA). Concentrated or frequent acidic exposure can irritate the mouth/stomach or contribute to tooth enamel erosion.

  2. Where does the citric acid cycle occur?

    In eukaryotic cells it occurs in the mitochondrial matrix; in bacteria it occurs in the cytosol.

  3. What does citric acid do to your body?

    It is a normal intermediate in energy metabolism and is readily metabolized to carbon dioxide and water. Citrate can bind minerals, which may enhance absorption of some and help prevent certain kidney stones by increasing urinary citrate.

  4. Where does citric acid come from?

    It occurs naturally in citrus fruits, but most food-grade citric acid is produced by fermenting sugars (e.g., from corn, beet, or cane) with Aspergillus niger.

  5. How is citric acid made?

    Industrially, sugars are fermented with Aspergillus niger to produce citric acid, then it is recovered and purified—often by precipitating calcium citrate and converting it back with sulfuric acid or via ion-exchange/crystallization.

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