Melting point :189.5 °C (dec.)(lit.)
Boiling point :365.1°C (estimate)
Density :0.99 g/mL at 25 °C
bulk density :750kg/m3
vapor density :4.4 (vs air)
vapor pressure :<0.01 mm Hg ( 20 °C)
refractive index :1.4261 (estimate)
Flash point :101-157°C
storage temp. :Store below +30°C.
solubility :water: soluble108g/L at 25°C
form :Liquid
pka :1.23(at 25℃)
color :White
PH Range :6 - 8 at 25 °C
PH :3(1 mM solution);2.09(10 mM solution);1.31(100 mM solution);
Odor :odorless
Water Solubility :90 g/L (20 ºC)
Sublimation :101-157 ºC
Merck :14,6911
BRN :385686
Henry's Law Constant :1.43 at pH 4 (quoted, Gaffney et al., 1987)
Exposure limits :NIOSH REL: TWA 1, STEL 2, IDLH 500; OSHA PEL: TWA 1; ACGIH TLV: TWA 1, STEL 2 (adopted).
Stability :Stable, but moisture sensitive. Incompatible with metals.
Cosmetics Ingredients Functions :CHELATING
InChI :1S/C2H2O4/c3-1(4)2(5)6/h(H,3,4)(H,5,6)
InChIKey :MUBZPKHOEPUJKR-UHFFFAOYSA-N
SMILES :OC(=O)C(O)=O
LogP :-1.7 at 23℃
CAS DataBase Reference :144-62-7(CAS DataBase Reference)
NIST Chemistry Reference :Oxalic acid(144-62-7)
EPA Substance Registry System :Oxalic acid (144-62-7)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H318 Causes serious eye damage Serious eye damage/eye irritation Category 1 Danger P280, P305+P351+P338, P310
Precautionary statements:	P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P270 Do not eat, drink or smoke when using this product. P280 Wear protective gloves/protective clothing/eye protection/face protection. P301+P312 IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.