Citric acid

Melting point :153-159 °C (lit.)
Boiling point :310 °C (decomp)
bulk density :560kg/m3
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
Flash point :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
Odor Type :odorless
biological source :synthetic
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 Merck :14,2326
JECFA Number :218
BRN :782061
Henry's Law Constant :3.1×10¹⁵ mol/(m³Pa) at 25℃, Burkholder et al. (2019)
Stability :Stable. Incompatible with bases, strong oxidizing agents, reducing agents, metal nitrates.
Cosmetics Ingredients Functions :CHELATING
FRAGRANCE
BUFFERING Cosmetic Ingredient Review (CIR) :Citric acid (77-92-9)
InChI :1S/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)
InChIKey :KRKNYBCHXYNGOX-UHFFFAOYSA-N
SMILES :OC(=O)CC(O)(CC(O)=O)C(O)=O
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)

Symbol(GHS):
Signal word:	Warning
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:	P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P271 Use only outdoors or in a well-ventilated area. P280 Wear protective gloves/protective clothing/eye protection/face protection. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.