3,4-Dihydro-1H-2-benzopyran-1-one
[CAS# 4702-34-5]

Identification

• Name: 3,4-Dihydro-1H-2-benzopyran-1-one
• Synonyms: 3,4-Dihydroisocoumarin
• Molecular Formula: C₉H₈O₂
• Molecular Weight: 148.16
• CAS Registry Number: 4702-34-5
• EC Number: 225-179-4

Properties

• Solubility: Slightly soluble (1.4 g/L) (25 ºC), Calc.^*
• Density: 1.203 g/cm³ (18.5 ºC)^**
• Melting point: 175-176 ºC^***
• Refractive index: 1.5664 (589.3 nm 18.5 ºC)^**

^* Calculated using Advanced Chemistry Development (ACD/Labs) Software V11.02 (©1994-2016 ACD/Labs)

^** Maitte, Pierre; Ann. chim. (Paris) 1954, V9, P431-75.

^*** Shaabani, Ahmad; Tetrahedron 2004, V60(50), P11415-11420.

Safety Data

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Skin irritation	Skin Irrit.	2	H315
Eye irritation	Eye Irrit.	2	H319
Specific target organ toxicity - single exposure	STOT SE	3	H335
Eye irritation	Eye Irrit.	2A	H319