Propiolic Acid Chemical Properties

Melting point:

16-18 °C (lit.)

Boiling point:

102 °C/200 mmHg (lit.)

Density 

1.138 g/mL at 25 °C (lit.)

refractive index 

n20/D 1.431(lit.)

Flash point:

138 °F

storage temp. 

2-8°C

solubility 

Chloroform (Soluble), Methanol (Soluble)

form 

Liquid After Melting

pka

1.84(at 25℃)

color 

Clear colorless to light brown

Specific Gravity

1.138

Water Solubility 

miscible

Merck 

14,7821

BRN 

878176

Stability:

Stable. Incompatible with bases, oxidizing agents, reducing agents. Combustible.

CAS DataBase Reference

471-25-0(CAS DataBase Reference)

NIST Chemistry Reference

Propiolic acid(471-25-0)

EPA Substance Registry System

2-Propynoic acid (471-25-0)

Safety Information

Hazard Codes 

T

Risk Statements 

24/25-34-25-23/24/25

Safety Statements 

26-36/37/39-45-24/25-7/9

RIDADR 

UN 2920 8/PG 2

WGK Germany 

3

RTECS 

UD9300000

F 

3-8

TSCA 

Yes

HazardClass 

8

PackingGroup 

II

HS Code 

29161980

Hazardous Substances Data

471-25-0(Hazardous Substances Data)

Toxicity

guinea pig,LD50,skin,100mg/kg (100mg/kg),"Patty's Industrial Hygiene and Toxicology," 3rd rev. ed., Clayton, G.D., and F.E. Clayton, eds., New York, John Wiley & Sons, Inc., 1978-82. Vol. 3 originally pub. in 1979; pub. as 2n rev. ed. in 1985.Vol. 2C, Pg. 4953, 1982.

MSDS

• Language:English Provider:2-Propynoic acid
• Language:English Provider:ACROS
• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

Propiolic Acid Usage And Synthesis

Chemical Properties

viscous yellow liquid

Uses

Propiolic acid is an intermediate in monohalogenated acetylene synthesis and a corrosion inhibitor for steel.

Uses

Propiolic acid is a reagent used in the preparation of transition metal complexes, haloalkyl propiolates and halopropenoates.

Uses

Reagent employed in the synthesis of transition metal complexes, haloalkyl propiolates, and halopropenoates.

Definition

ChEBI: A terminal acetylenic compound that is a 3-carbon, straight-chain, monounsaturated fatty acid having one acetylenic bond.

References

[1] Elmer Raunio, Louis Remsberg and Jr. “Notes- Potassium Hydroxide as a Catalyst for the Condensation of Propiolic Acid or Propiolic Esters with Ketones.” The Journal of Organic Chemistry 25 8 (1960): 1436–1437.
[2] K. Okuma, Toshiyuki Shigetomi, M. Koda. “Reaction of Selenoketones with Propiolic Acid.” Phosphorus Sulfur and Silicon and The Related Elements 9 5 1 (2008): 1057–1060.
[3] Dirk Hollenw?ger* and Andreas J. Kornath. “Synthesis and Structure of Protonated Propiolic Acid.” The Journal of Organic Chemistry 89 16 (2024): 11421-11428 11421-11428.

Propiolic Acid(471-25-0)Related Product Information

• Stearic acid
• Folic acid
• Citric acid
• Hyaluronic acid
• Methyl propiolate
• Ethyl 2-(Chlorosulfonyl)acetate
• Ethyl propiolate
• PROPYNOIC ACID AMIDE
• Ascoric Acid
• Acetylenedicarboxylic acid
• METHYL 2-OCTYNOATE
• 2-OCTYNOIC ACID
• 2-Butynoic acid
• PENTAACETYL-5-THIOGLUCOSE
• ETHYL 2-HEXYNOATE
• Acetylenedicarboxylic acid monopotassium salt
• METHYL 2-BUTYNOATE
• Ethyl 2-butynoate