Propionic Acid

Product Name:

Propionic acid

Synonyms:

Propionic acid, ACS reagent;PROPIONIC ACID FOR SYNTHESIS 1 L;PROPIONIC ACID FOR SYNTHESIS 2,5 L;PROPIONIC ACID FOR SYNTHESIS 500 ML;PROPIONIC ACID FOR SYNTHESIS 100 ML;1-Propionic acid;Propionic acid, AR,>=99.5%(GC);Propionic acid ACS reagent, >=99.5%

CAS:

79-09-4

MF:

C3H6O2

MW:

74.08

EINECS:

201-176-3

Mol File:

79-09-4.mol

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

Fp 

125 °F

storage temp. 

0-6°C

solubility 

organic solvents: soluble(lit.)

pka

4.86(at 25℃)

form 

Liquid

color 

≤10, APHA:

Specific Gravity

0.996 (20/4℃)

PH

2.5 (100g/l, H2O, 20℃)

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).

Stability:

Stable. Incompatible with strong oxidizing agents. Flammable.

InChIKey

XBDQKXXYIPTUBI-UHFFFAOYSA-N

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)

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)

Chemical Properties

Propionic acid, CH3CH2COOH, also known as propanoic acid and methylacetic acid, is a clear, colorless liquid that boils at 140°C (284 OF). It is flammable. It has a pungent odor and is soluble in water and alcohol. The Odor Threshold is 0.16 ppm. Propionic acid is an aliphatic monocarboxylic acid. Propionic acid is used in nickel electroplating solutions,perfumes, artificial flavors, pharmaceuticals, and manufacturing propionates.

Uses

Propionic acid is used in the productionof propionates used as mold inhibitors andpreservatives for grains and wood chips, inthe manufacture of fruit flavors and perfumebases, and as an esterifying agent.

Production Methods

Propionic acid can be obtained from wood pulp waste liquor by fermentation. It can also be prepared from ethylene, carbon monoxide and steam; from ethanol and carbon monoxide using boron trifluoride catalyst; from natural gas; or as a by-product in the pyrolysis of wood. Very pure propionic acid can be obtained from propionitrile. Propionic acid can be found in dairy products in small amounts.

Chemical Synthesis

Commercial processes produce propionic acid by chemical synthesis and in small quantities by bacterial fermentation

Raw materials

Oxygen-->CARBON MONOXIDE-->Paraffin wax-->Cupric acetate monohydrate -->Propionaldehyde-->Molasses-->Cobalt naphthenate -->NICKEL CARBONYL-->Manganese naphthenate

Preparation Products

Methyl propionate-->Metalaxyl-->3,4-DIAMINOQUINOLINE-->Ethyl propionate-->Ciprofloxacin-->4-AMINO-3-NITROQUINOLINE-->DL-Alanine-->Dimethyl fumarate-->isoindoline-5-carboxylic acid-->Sodium propionate-->Ethyl 2-bromopropionate-->4-Chloro-3-nitroquinoline-->METHYL ISOINDOLINE-5-CARBOXYLATE-->ETHYL 3-PHENYLGLYCIDATE-->2-Bromoanthracene-->3-Chloropropionic acid-->Propanil -->5-BROMOISOINDOLINE-->2-Methylhexanoic acid-->4-bromoisoindoline-->3-Methylquinoline-->2-Chloropropionic acid-->Tiopronin-->6-BROMO-3,4-DIHYDRO-1H-QUINOLIN-2-ONE-->Napropamide-->Ethyl 2-chloropropionate-->SOLVENT YELLOW 85-->DL-2-Bromopropionic -->2-Chloropropionyl chloride-->Calcium dipropionate-->3-NITRO-4-QUINOLINOL-->LINALYL PROPIONATE-->CITRONELLYL PROPIONATE-->PROPIONIC ACID POTASSIUM SALT-->Isobutyl propionate-->TERPINYL PROPIONATE-->BETA-(4-(ACETYLAMIDO)PHENOXY)PROPANOIC ACID-->Methyl 2-chloropropionate-->Diclofop-methyl-->Furfuryl thiopropionate