2-butynoic acid(CAS#590-93-2)

Chemical Property:

Molecular Formula	C4H4O2
Molar Mass	84.07
Density	0,9641 g/cm3
Melting Point	78-80 °C (lit.)
Boling Point	200-203°C
Flash Point	200-203°C
Water Solubility	Soluble in water. Slightly soluble in methanol and chloroform.
Solubility	water: soluble50mg/mL, clear to very slightly hazy, colorless to very faintly yellow
Vapor Presure	0.117mmHg at 25°C
Appearance	White to yellow powder
Color	White to yellow
BRN	1740205
pKa	2.62(at 25℃)
Storage Condition	Sealed in dry,2-8°C
Refractive Index	1.3918 (estimate)
MDL	MFCD00004363
Use	This product is for scientific research only and shall not be used for other purposes.

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Product Detail

Product Tags

Hazard Symbols	C – Corrosive
Risk Codes	R34 – Causes burns R20/21/22 – Harmful by inhalation, in contact with skin and if swallowed.
Safety Description	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 the label whenever possible.)
UN IDs	UN 3261 8/PG 2
WGK Germany	3
TSCA	Yes
HS Code	29161900
Hazard Class	8
Packing Group	II

Introduction

Used in a series of reactions to synthesize fibers, such as the cyclic acylation of phenols to cyclic ketones or chromones, and the cyclization of γ-butyrolactone.

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