4-Ethynylphthalic anhydride
[CAS# 73819-76-8]

Identification

• Name: 4-Ethynylphthalic anhydride
• Synonyms: CKK 1; FF Monomer 301; KK 1; 5-Ethynylisobenzofuran-1,3-dione
• Molecular Formula: C₁₀H₄O₃
• Molecular Weight: 172.14
• CAS Registry Number: 73819-76-8
• EC Number: 680-029-9

Properties

• Solubility: Very slightly soluble (0.29 g/L) (25 °C), Calc.^*
• Density: 1.41±0.1 g/cm³ (20 °C 760 Torr), Calc.^*
• Melting point: 120-122 °C^**

^* Calculated using Advanced Chemistry Development (ACD/Labs) Software V11.02 (©1994-2015 ACD/Labs)

^** Sabourin, Edward T.

Safety Data

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Eye irritation	Eye Irrit.	2	H319
Skin irritation	Skin Irrit.	2	H315