Question 1

What is the Citric acid?

Accepted Answer

Citric acid is White crystalline powder, while it's Molecular Formula is C6H8O7. White crystalline powder Citric Acid is an acidulant and antioxidant produced by mold fermentation of sugar solutions and by extraction from lemon juice, lime juice, and pineapple canning residue. it is the predominant acid in oranges, lemons, and limes. it exists in anhydrous and monohydrate forms. the anhydrous form is crystallized in hot solutions and the monohydrate form is crystallized from cold (below 36.5°c) solutions. anhydrous citric acid has a solubility of 146 g and monohydrate citric acid has a solubility of 175 g/100 ml of distilled water at 20°c. a 1% solution has a ph of 2.3 at 25°c. it is a hygroscopic, strong acid of tart flavor. it is used as an acidulant in fruit drinks and carbonated beverages at 0.25-0.40%, in cheese at 3-4%, and in jellies. it is used as an antioxidant in instant potatoes, wheat chips, and potato sticks, where it prevents spoilage by trapping the metal ions. it is used in combination with antioxidants in the processing of fresh frozen fruits to prevent discoloration.

Question 2

What is the CAS number for Citric acid?

Accepted Answer

The CAS number of Citric acid is 77-92-9.

Question 3

What is Citric acid (77-92-9) used for?

Accepted Answer

Citric acid is a white, crystalline, weak organic acid present in most plants and many animals as an intermediate in cellular respiration. Citric acid contains three carboxyl groups making it a carboxylic, more specifically a tricarboxylic, acid.the name citrus originates from the Greek kedromelon meaning apple of melon for the fruit citron. Greek works mention kitron, kitrion, or kitreos for citron fruit, which is an oblong fruit several inches long from the scrublike tree Citrus medica. Lemons and limes have high citric acid content, which may account for up to 8% of the fruit's dry weight.Citric acid is a weak acid and loses hydrogen ions from its three carboxyl groups (COOH) in solution.the loss of a hydrogen ion from each group in the molecule results in the citrate ion,C3H5O(COO)33. A citric acid molecule also forms intermediate ions when one or two hydrogen atoms in the carboxyl groups ionize.the citrate ion combines with metals to form salts, the most common of which is calcium citrate. Citric acid forms esters to produce various citrates, for example trimethyl citrate and triethyl citrate.InChI:InChI=1/C6H8O7/c7-3(8)1-6(13,5(11)12)2-4(9)10/h13H,1-2H2,(H,7,8)(H,9,10)(H,11,12)/p-3

CAS Number	77-92-9
Density	1.762 g/cm³
Melting Point	153-159 °C(lit.)
Boiling Point	309.567 °C at 760 mmHg
Flash Point	155.243 °C
Vapor Pressure	5.73E-05mmHg at 25°C
Refractive Index	1.493~1.509
HS CODE	2918.14 Oral rat LD50: 3000 mg/kg
PSA	132.13000
LogP	-1.24850
Pka	3.14(at 20℃)
Meeting	18
Specs Code	R
Previous Years	1974, FAS 7/NMRS 54B-JECFA 18/192; COMPENDIUM/991. R 1973, FNP 4-JECFA 17/216. R 1965, FAS 67.29/NMRS 40A,B,C-JECFA 9/88. N1974, FAS 7/NMRS 54B-JECFA 18/192; COMPENDIUM/991. R 1973, FNP 4-JECFA 17/216. R 1965, FAS 67.29/NMRS 40A,B,C-JECFA 9/88. N

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