Citric Acid Anhydrous CAS#77-92-9

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.

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Citric Acid Anhydrous CAS#77-92-9

Product Name: Citric acid
Synonyms: Citric acid Vetec(TM) reagent grade, 99%;Buffer solution according to Weise;FLUORESCEIN DISODIUM SALT USP GRADE;PROPYLENE GLYCOL HIGH PURITY GRADE;READY LADDER 50BP DNA MARKER;YELLOW PRIMARY SOLUTION;CITRICACID,ANHYDROUS,PREMIUM(BULK;CITRICACID,ANHYDROUS,USP(BULK
CAS: 77-92-9
MF: C6H8O7
MW: 192.12
EINECS: 201-069-1
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Mol File: 77-92-9.mol
Citric acid Structure
Citric acid Chemical Properties
Melting point 153-159 °C (lit.)
Boiling point 248.08°C (rough estimate)
density 1.67 g/cm3 at 20 °C
vapor density 7.26 (vs air)
vapor pressure <0.1 hPa (20 °C)
refractive index 1.493~1.509
FEMA 2306 | CITRIC ACID
Fp 100 °C
storage temp. 2-8°C
solubility Citric acid also dissolves in absolute (anhydrous) ethanol (76 parts of citric acid per 100 parts of ethanol) at 15 °C.
form grit
pka 3.14(at 20℃)
color White
Odor Odorless
PH 3.24(1 mM solution);2.62(10 mM solution);2.08(100 mM solution);
Odor Type odorless
explosive limit 8%, 65°F
Water Solubility soluble in Water (1174g/L at 10°C, 1809g/L at 30°C, 3825g/L at 80°C).
Sensitive Hygroscopic
λmax λ: 260 nm Amax: 0.20
λ: 280 nm Amax: 0.10
JECFA Number 218
Merck 14,2326
BRN 782061
Stability: Stable. Incompatible with bases, strong oxidizing agents, reducing agents, metal nitrates.
InChIKey KRKNYBCHXYNGOX-UHFFFAOYSA-N
LogP -1.64
CAS DataBase Reference 77-92-9(CAS DataBase Reference)
NIST Chemistry Reference 1,2,3-Propanetricarboxylic acid, 2-hydroxy-(77-92-9)
EPA Substance Registry System Citric acid (77-92-9)