Natural Propionic Acid

Product Name:

Natural Propionic acid

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.

Occurrence

Reported found in apple, apple juice, banana, currants, pineapple, raspberry, papaya, onion, sauerkraut, tomato, vinegar, beef, beef broth, beer, blackberry juice, bread, cheese, cherry juice, butter, yogurt, milk, cream, lean and fatty fish, cured pork, cooked beef and mutton, chicken fat, cognac, rum, whiskies, cider, sherry, roasted cocoa bean, cocoa powder, coffee, black currant juice, white currant juice, grape juice, grape musts and port wine, grapefruit juice, grape syrup, orange juice, Valencia orange oil, orange essence, roasted peanuts, pecans, potato chips, honey, soybean, Arctic bramble, coconut meat, cloudberry, mushroom, sesame seed, cardamom, rice, jackfruit, sake, buckwheat, laurel, peated malt, cassava, Bourbon vanilla, oyster, mussels, scallop, Chinese quince and maté.

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.

Uses

Propionic Acid is the acid source of the propionates. propionic acid in the liquid form has a strong odor and is corrosive, so it is used as the sodium, calcium, and potassium salts as a preservative. these yield the free acid in the ph range of the food in which they are used. it functions principally against mold. see calcium propionate; sodium propionate.

Fire Hazard

Flammable/combustible material. May be ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water.

Incompatibilities

Propionic acid is a medium strong acid. Incompatible with sulfuric acid, strong bases; ammonia, isocyanates, alkylene oxides; epichlorohydrin. Reacts with bases; strong oxidizers; and amines, causing fire and explo- sion hazard. Attacks many metals forming flammable/ explosive hydrogen gas. It can be salted out of aqueous solutions by the addition of calcium chloride or other salts.

Waste Disposal

Incineration in admixture with flammable solvent.

Regulatory Status

GRAS listed. Accepted for use in Europe as a food additive. In Japan, propionic acid is restricted to use as a flavoring agent.