471-25-0

Name Propiolic acidd
CAS 471-25-0
EINECS(EC#) 207-437-8
Molecular Formula C3H2O2
MDL Number MFCD00004360
Molecular Weight 70.05
MOL File 471-25-0.mol
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Chemical Properties

Appearance viscous yellow liquid
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.)
Fp  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
Stability: Stable. Incompatible with bases, oxidizing agents, reducing agents. Combustible.
Water Solubility  miscible
Merck  14,7824
BRN  878176
InChI 1S/C3H2O2/c1-2-3(4)5/h1H,(H,4,5)
InChIKey UORVCLMRJXCDCP-UHFFFAOYSA-N
SMILES OC(=O)C#C
CAS DataBase Reference 471-25-0(CAS DataBase Reference)
NIST Chemistry Reference Propiolic acid(471-25-0)
EPA Substance Registry System 471-25-0(EPA Substance)
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Safety Data

Symbol(GHS)  Flame (GHS02)Corrosion (GHS05)Skull and Crossbones (GHS06)
GHS02,GHS05,GHS06
Signal word  Danger
Hazard statements  H226-H301-H310-H314
Precautionary statements  P210-P233-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338
Hazard Codes  T
Risk Statements 
R24/25:Toxic in contact with skin and if swallowed .
R34:Causes burns.
R25:Toxic if swallowed.
R23/24/25:Toxic by inhalation, in contact with skin and if swallowed .
Safety Statements 
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S24/25:Avoid contact with skin and eyes .
S7/9:Keep container tightly closed and in a well-ventilated place .
RIDADR  UN 2920 8/PG 2
WGK Germany  3
RTECS  UD9300000
F  3-8
TSCA  Yes
REACH Registrations Active
HazardClass  8
PackingGroup  II
HS Code  29161980
Storage Class 3 - Flammable liquids
Hazard Classifications Acute Tox. 2 Dermal
Acute Tox. 3 Oral
Eye Dam. 1
Flam. Liq. 3
Skin Corr. 1B
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.

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