Malic acid

Melting point :131-133 °C (lit.)
Boiling point :167.16°C (rough estimate)
alpha :[α]D20 -0.5～+0.5° (c=5, H2O)
Density :1.609
bulk density :800kg/m3
vapor density :4.6 (vs air)
vapor pressure :<0.1 mm Hg ( 20 °C)
refractive index :1.3920 (estimate)
Flash point :203 °C
storage temp. :2-8°C
solubility :methanol: 0.1 g/mL, clear, colorless
pka :3.4(at 25℃)
form :Solid
color :White to Almost white
Odor :at 100.00 %. odorless
PH :3.33(1 mM solution);2.74(10 mM solution);2.21(100 mM solution);
Odor Type :odorless
biological source :synthetic
optical activity :[α]/D 0.10 to +0.10°
Water Solubility :558 g/L (20 ºC)
Merck :14,5707
BRN :1723539
Henry's Law Constant :2.7×10⁸ mol/(m³Pa) at 25℃, Compernolle and Müller (2014)
Major Application :pharmaceutical (small molecule)
Cosmetic Ingredient Review (CIR) :Malic acid (6915-15-7)
InChI :1S/C4H6O5/c5-2(4(8)9)1-3(6)7/h2,5H,1H2,(H,6,7)(H,8,9)
InChIKey :BJEPYKJPYRNKOW-UHFFFAOYSA-N
SMILES :OC(CC(O)=O)C(O)=O
LogP :-6.14 at 20℃
CAS DataBase Reference :6915-15-7(CAS DataBase Reference)
NIST Chemistry Reference :Hydroxybutanedioic acid(6915-15-7)
EPA Substance Registry System :Malic acid (6915-15-7)

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
Precautionary statements:	P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. 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. P337+P313 IF eye irritation persists: Get medical advice/attention.