Melting point :−24-−23 °C(lit.)
Boiling point :141 °C(lit.)
Density :0.993 g/mL at 25 °C(lit.)
vapor density :2.55 (vs air)
vapor pressure :2.4 mm Hg ( 20 °C)
refractive index :n20/D 1.386(lit.)
FEMA :2924 | PROPIONIC ACID
Flash point :125 °F
storage temp. :Store below +30°C.
solubility :organic solvents: soluble(lit.)
pka :4.86(at 25℃)
form :Liquid
Specific Gravity :0.996 (20/4℃)
color :≤10, APHA:
PH :3.96(1 mM solution);3.44(10 mM solution);2.94(100 mM solution);
Odor :at 0.10 % in propylene glycol. pungent acidic cheesy vinegar
Odor Type :acidic
Odor Threshold :0.0057ppm
explosive limit :2.1-12%(V)
Water Solubility :37 g/100 mL
Merck :14,7825
JECFA Number :84
BRN :506071
Exposure limits :TLV-TWA 10 ppm (～30 mg/m³) (ACGIH).
Dielectric constant :3.2（Ambient）
Stability :Stable. Incompatible with strong oxidizing agents. Flammable.
InChIKey :XBDQKXXYIPTUBI-UHFFFAOYSA-N
LogP :0.33 at 25℃
CAS DataBase Reference :79-09-4(CAS DataBase Reference)
NIST Chemistry Reference :Propanoic acid(79-09-4)
EPA Substance Registry System :Propionic acid (79-09-4)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H226 Flammable liquid and vapour Flammable liquids Category 3 Warning H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501 H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:	P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P233 Keep container tightly closed. P240 Ground/bond container and receiving equipment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.