Chinese name: Citric acid
English name: Citric acid
CAS: 77-92-9
EINECS number: 201-069-1
Molecular formula: C6H8O7
MDL number: MFCD00163176
Molecular weight: 192.12
Appearance properties: white crystalline powder, odorless.
Appearance: white translucent crystal or powder. Soluble in water and ethanol, soluble in ether.
Soluble in water, ethanol, ether, insoluble in benzene, slightly soluble in chloroform.
Melting point: 153-159 °C(lit.)
Boiling point: 248.08°C (rough estimate)
Density: 1.542
Vapor density: 7.26 (vs air)
Vapor pressure: < 0.1hPa (20 °C)
FEMA: 2306
Refractive index: 1.493~1.509
Flash point: 100 °C
Storage: Store at RT.
Solubility: H2O: 1 M at 20 °C, clear, colorless
Acidity coefficient (pKa) : 3.14(at 20℃)
Form: grit
Color: White
PH value: 1.0-2.0 (25℃, 1M in H2O)
Odor: Odorless
explosive limit: 8%, 65°F
Scent type: odorless
Water solubility: 750 g/L (20 ºC)
Sensitivity: hygroscopicity
Maximum wavelength (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 alkali, strong oxidant, reducing agent, metal nitrate.
InChIKey: KRKNYBCHXYNGOX-UHFFFAOYSA-N
LogP: -1.64
use
It is mainly used as a sour flavor agent for food, and is also used in the preparation of pharmaceutical coolant and detergent additives