590-93-2

Name 2-Butynoic acid
CAS 590-93-2
EINECS(EC#) 209-695-7
Molecular Formula C4H4O2
MDL Number MFCD00004363
Molecular Weight 84.07
MOL File 590-93-2.mol
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Chemical Properties

Appearance white to yellow powder
Melting point  78-80 °C (lit.)
Boiling point  200-203°C
density  0,9641 g/cm3
refractive index  1.3918 (estimate)
Fp  200-203°C
storage temp.  Sealed in dry,2-8°C
solubility  water: soluble50mg/mL, clear to very slightly hazy, colorless to very faintly yellow
form  Powder
pka 2.62(at 25℃)
color  White to yellow
Water Solubility  Soluble in water. Slightly soluble in methanol and chloroform.
Detection Methods T,NMR
BRN  1740205
InChI 1S/C4H4O2/c1-2-3-4(5)6/h1H3,(H,5,6)
InChIKey LUEHNHVFDCZTGL-UHFFFAOYSA-N
SMILES CC#CC(O)=O
CAS DataBase Reference 590-93-2(CAS DataBase Reference)
NIST Chemistry Reference 2-Butynoic acid(590-93-2)
EPA Substance Registry System 590-93-2(EPA Substance)
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Safety Data

Symbol(GHS)  Corrosion (GHS05)
GHS05
Signal word  Danger
Hazard statements  H314
Precautionary statements  P260-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338-P363
Hazard Codes  C
Risk Statements 
R34:Causes burns.
R20/21/22:Harmful 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 .
S27:Take off immediately all contaminated clothing .
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) .
RIDADR  UN 3261 8/PG 2
WGK Germany  3
TSCA  Yes
REACH Registrations Active
HazardClass  8
PackingGroup  II
HS Code  29161900
Storage Class 8A - Combustible corrosive hazardous materials
Hazard Classifications Eye Dam. 1
Skin Corr. 1B

Hazard Information

Material Safety Data Sheet(MSDS)

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