4-Chromanone
- CAS No.
- 491-37-2
- Chemical Name:
- 4-Chromanone
- Synonyms
- CHROMAN-4-ONE;CHROMANONE;Isochromanone;2,3-Dihydro-4H-1-benzopyran-4-one;4-Chlomanone;4-CHROMANONE;4-chormanone;CHROMANONE, 4-;4-Chromanone,99%;4-Chromanone >
- CBNumber:
- CB4191157
- Molecular Formula:
- C9H8O2
- Molecular Weight:
- 148.16
- MOL File:
- 491-37-2.mol
- MSDS File:
- SDS
- Modify Date:
- 2023/7/28 17:44:41
| Melting point | 35-38 °C(lit.) |
|---|---|
| Boiling point | 127-128 °C13 mm Hg(lit.) |
| Density | 1.1291 |
| refractive index |
n |
| Flash point | >230 °F |
| storage temp. | Keep in dark place,Sealed in dry,Room Temperature |
| form | Crystalline Powder, Crystals or Low Melting Mass |
| color | White to yellow |
| Water Solubility | Slightly soluble in water. |
| BRN | 124652 |
| InChIKey | MSTDXOZUKAQDRL-UHFFFAOYSA-N |
| LogP | 1.990 (est) |
| CAS DataBase Reference | 491-37-2(CAS DataBase Reference) |
| NIST Chemistry Reference | 4H-1-Benzopyran-4-one, 2,3-dihydro-(491-37-2) |
| EPA Substance Registry System | 4H-1-Benzopyran-4-one, 2,3-dihydro- (491-37-2) |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS07 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Warning | |||||||||
| Hazard statements | H303 | |||||||||
| Precautionary statements | P270-P301+P312-P403-P501c | |||||||||
| Hazard Codes | Xi | |||||||||
| Risk Statements | 33-36/37/38 | |||||||||
| Safety Statements | 24/25-36-26 | |||||||||
| WGK Germany | 2 | |||||||||
| RTECS | DJ2981225 | |||||||||
| TSCA | Yes | |||||||||
| HazardClass | IRRITANT | |||||||||
| HS Code | 29329990 | |||||||||
| NFPA 704 |
|
4-Chromanone price More Price(6)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich(India) | 122351 | 4-Chromanone 97% | 491-37-2 | 10G | ₹4643.93 | 2022-06-14 | Buy |
| ALFA India | ALF-A11242-22 | 4-Chromanone, 98+% | 491-37-2 | 100g | ₹15855 | 2022-05-26 | Buy |
| ALFA India | ALF-A11242-14 | 4-Chromanone, 98+% | 491-37-2 | 25g | ₹8876 | 2022-05-26 | Buy |
| TCI Chemicals (India) | C1175 | 4-Chromanone min. 98.0 % | 491-37-2 | 5G | ₹2900 | 2022-05-26 | Buy |
| ALFA India | ALF-A11242-06 | 4-Chromanone, 98+% | 491-37-2 | 5g | ₹3517 | 2022-05-26 | Buy |
4-Chromanone Chemical Properties,Uses,Production
Chemical Properties
white to light yellow crystal powder
Uses
4-Chromanone has been used to study the substrate specificity and catalytic ability of 4-hydroxyacetophenone monooxygenase isolated from Pseudomonas fluorescens ACB
Purification Methods
It has been recrystallised from pet ether, or purified by dissolving in *C6H6 washing with H2O, drying (MgSO4), evaporating and distilling in a vacuum, then recrystallising the residue. The liquid has a pleasant lemon-like odour. The semicarbazone has m 227o. [Loudon & Razdan J Chem Soc 4299 1954.] The oxime is prepared from 3g of chromanone, 3g NH2OH.HCl in EtOH (50mL), 6g K2CO3 and refluxed on a water bath for 6hours. The solution is poured into H2O, the solid is filtered off, dried and dissolved in hot *C6H6 which on addition of pet ether yields the oxime as glistening needles m 140o. Hydrolysis of this gives very pure chromanone. The benzal derivative is prepared from 3g of chromanone and 4g PhCHO in 50mL EtOH, heated to boiling, 10mL of conc HCl are added dropwise and set aside for several days. The derivative separates and is recrystallised from EtOH to give yellow needles, m 112o [Powell J Am Chem Soc 45 2711 1923]. Reaction with Pb(OAc)4 yields the 3-acetoxy derivative m 74o (from pet ether + trace of EtOAc) [Cavill et al. J Chem Soc 4573 1954, Beilstein 17/10V 14].
4-Chromanone Preparation Products And Raw materials
Raw materials
Preparation Products
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