Products Description of Citric acid Monohydrate CAS#77-92-9
Citric acid Anhydrous is an important organic weak acid, also known as citric acid. It is a naturally occurring component in both animals and plants, and is also an intermediate product in biological metabolism (the tricarboxylic acid cycle). Industrially, it is mainly produced by deep fermentation of sugar-containing substances (such as corn starch, molasses) by microorganisms like Aspergillus niger. Unlike citric acid monohydrate, citric acid anhydrous is crystallized from hot concentrated aqueous solutions and does not contain bound water, thus having a higher acid concentration per unit mass and better stability.
Parameters
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: 0.20 |
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
Hazard Codes | Xi,C,T |
Risk Statements | 41-36/37/38-36/38-37/38-34-36-35-61-60 |
Safety Statements | 26-39-37/39-24/25-36/37/39-45-36-53 |
RIDADR | UN 1789 8/PG 3 |
WGK Germany | 1 |
RTECS | GE7350000 |
F | 9 |
TSCA | Yes |
HS Code | 2918 14 00 |
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 Application of Citric acid CAS#77-92-9
Due to its excellent acidity regulation, preservation and preservation, antioxidant, and metal ion chelation capabilities, citric acid anhydrous is widely used in various industries. It is known as the "first edible acidulant" and is extensively used in the preparation of various fruit-flavored sodas, jams, and candies. It is often combined with sodium bicarbonate to form effervescent tablets, which enables the drug to dissolve quickly and improve the taste. It is also used as a pH buffer, chelating agent and antioxidant in skin care products, helping to maintain the stability and safety of the products.
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Inventory 2-3 working days New production 7-10 working days
