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Propionic acid Structure

Propionic acid

Chemical Properties

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)

Safety Information

Hazard Codes  C
Risk Statements  36/37/38-34-10
Safety Statements  26-36-45-23
RIDADR  UN 3463 8/PG 2
WGK Germany  1
RTECS  UE5950000
Autoignition Temperature 955 °F
TSCA  Yes
HazardClass  8
PackingGroup  II
HS Code  29155010
Hazardous Substances Data 79-09-4(Hazardous Substances Data)
Toxicity LD50 orally in rats: 4.29 g/kg (Smyth)

MSDS

Usage And Synthesis

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