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Citric Acid

Name: Citric Acid
SKU: 0

Basic Information

CAS No.: 77-92-9
Molecular Formula: C6H8O7
Molecular Weight: 192.12

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Product Details

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.

Chemical Properties

Melting point	153-159 °C (lit.)
Boiling point	248.08°C (rough estimate)
density	1.67 g/cm3 at 20 °C
bulk density	560kg/m3
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
PH	3.24(1 mM solution);2.62(10 mM solution);2.08(100 mM solution);
Odor	Odorless
biological source	synthetic
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: 0.20λ: 280 nm Amax: 0.10
Merck	14,2326
JECFA Number	218
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)

Safety Information

Property	Value
Hazard symbols	Xi, C, T
Hazard class codes	41-36/37/38-36/38-37/38-34-36-35-61-60
Safety descriptions	26-39-37/39-24/25-36/37/39-45-36-53
UN dangerous goods number	UN 1789 8/PG 3
WGK Germany	1
RTECS number	GE7350000
F	9
TSCA	TSCA listed
HS code	2918 14 00
Storage class	11 - Combustible solids
Hazard class (category)	Eye irritation, Category 2 Specific target organ toxicity – single exposure, Category 3
Hazardous substances data	77-92-9 (Hazardous Substances Data)
Toxicity	LD50 in mice, rats (mmol/kg): 5.0, 4.6 i.p. (Gruber, Halbeisen)

Product Usage

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.

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Citric Acid

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