3,4-dihydro-1H-2-benzopyran-1-one
- CAS NO.：4702-34-5
- Empirical Formula: C9H8O2
- Molecular Weight: 148.16
- MDL number: MFCD00799232
- EINECS: 225-179-4
- SAFETY DATA SHEET (SDS)
- Update Date: 2025-07-14 15:27:00
What is 3,4-dihydro-1H-2-benzopyran-1-one?
Definition
ChEBI: The simplest member of the class of dihydroisocoumarins that is the 3,4-dihydro derivative of isocoumarin.
Synthesis Reference(s)
Journal of the American Chemical Society, 79, p. 3165, 1957 DOI: 10.1021/ja01569a047
Tetrahedron Letters, 37, p. 4179, 1996 DOI: 10.1016/0040-4039(96)00789-7
Properties of 3,4-dihydro-1H-2-benzopyran-1-one
| Melting point: | 37-39 °C |
| Boiling point: | 160°C/11mmHg(lit.) |
| Density | 1.2030 |
| refractive index | 1.5640 to 1.5680 |
| storage temp. | Sealed in dry,Room Temperature |
| form | clear liquid |
| color | Colorless to Light orange to Yellow |
Safety information for 3,4-dihydro-1H-2-benzopyran-1-one
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P271:Use only outdoors or in a well-ventilated area. P280:Wear protective gloves/protective clothing/eye protection/face protection. P362:Take off contaminated clothing and wash before reuse. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P332+P313:IF SKIN irritation occurs: Get medical advice/attention. P337+P313:IF eye irritation persists: Get medical advice/attention. P405:Store locked up. P403+P233:Store in a well-ventilated place. Keep container tightly closed. P501:Dispose of contents/container to..… |
Computed Descriptors for 3,4-dihydro-1H-2-benzopyran-1-one
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![1H-ISOCHROMENE-1,3,4-TRIONE 4-[N-(4-FLUOROPHENYL)HYDRAZONE]](https://img.chemicalbook.in/StructureFile/ChemBookStructure2/GIF/CB2139641.gif)
![1H-2-BENZOPYRAN-1,3,4-TRIONE 4-[N-(4-CHLOROPHENYL)HYDRAZONE]](https://img.chemicalbook.in/StructureFile/ChemBookStructure2/GIF/CB7203684.gif)
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