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2-Butynoic acid Structure

2-Butynoic acid

Chemical Properties

Melting point 78-80 °C (lit.)
Boiling point 200-203°C
Density  0,9641 g/cm3
refractive index  1.3918 (estimate)
Flash point 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.
BRN  1740205
InChIKey LUEHNHVFDCZTGL-UHFFFAOYSA-N
CAS DataBase Reference 590-93-2(CAS DataBase Reference)
FDA UNII W3AM9ANZ22
NIST Chemistry Reference 2-Butynoic acid(590-93-2)
EPA Substance Registry System 2-Butynoic acid (590-93-2)

Safety

Symbol(GHS)
Signal wordDanger
Hazard statements H314
Precautionary statements P260-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338-P363
Hazard Codes  C
Risk Statements  34-20/21/22
Safety Statements  26-27-36/37/39-45
RIDADR  UN 3261 8/PG 2
WGK Germany  3
TSCA  Yes
HazardClass  8
PackingGroup  II
HS Code  29161900
NFPA 704:
1
3 0

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