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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
MDL Number:
MFCD00006840
MOL File:
491-37-2.mol
MSDS File:
SDS
Last updated:2024-12-18 14:08:52

4-Chromanone Properties

Melting point 35-38 °C(lit.)
Boiling point 127-128 °C13 mm Hg(lit.)
Density 1.1291
refractive index n20/D 1.575(lit.)
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)
EWG's Food Scores 1
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)  GHS hazard pictograms
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
1
0 0

4-Chromanone price More Price(33)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 122351 4-Chromanone 97% 491-37-2 10g $143 2024-03-01 Buy
TCI Chemical C1175 4-Chromanone >98.0%(GC) 491-37-2 5g $59 2024-03-01 Buy
TCI Chemical C1175 4-Chromanone >98.0%(GC) 491-37-2 25g $179 2024-03-01 Buy
Alfa Aesar A11242 4-Chromanone, 98+% 491-37-2 5g $51.65 2024-03-01 Buy
Alfa Aesar A11242 4-Chromanone, 98+% 491-37-2 25g $173.65 2024-03-01 Buy
Product number Packaging Price Buy
122351 10g $143 Buy
C1175 5g $59 Buy
C1175 25g $179 Buy
A11242 5g $51.65 Buy
A11242 25g $173.65 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

Definition

ChEBI: 4-Chromanone is a member of chromones.

Synthesis Reference(s)

The Journal of Organic Chemistry, 48, p. 5160, 1983 DOI: 10.1021/jo00174a003

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].

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View Lastest Price from 4-Chromanone manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
4-Chromanone pictures 2023-07-29 4-Chromanone
491-37-2
US $0.00 / kg 1kg 99% 1000tons Hebei Mojin Biotechnology Co., Ltd
4-Chromanone pictures 2023-04-28 4-Chromanone
491-37-2
US $0.00 / KG 1KG 99% 10 mt Hebei Weibang Biotechnology Co., Ltd
4-Chromanone  pictures 2021-10-29 4-Chromanone
491-37-2
US $1.10 / g 1g 99.00% 100 Tons Min Dideu Industries Group Limited
  • 4-Chromanone pictures
  • 4-Chromanone
    491-37-2
  • US $0.00 / kg
  • 99%
  • Hebei Mojin Biotechnology Co., Ltd
  • 4-Chromanone pictures
  • 4-Chromanone
    491-37-2
  • US $0.00 / KG
  • 99%
  • Hebei Weibang Biotechnology Co., Ltd
  • 4-Chromanone  pictures
  • 4-Chromanone
    491-37-2
  • US $1.10 / g
  • 99.00%
  • Dideu Industries Group Limited
,3-Dihydro-2-benzopyran-4-one ,3-Dihydro-4-benzopyranone 2,3-dihydro-4-benzopyranone 2,3-dihydro-4h-1-benzopyran-4-on 4-chormanone CHROMANONE, 4- 2,3-DIHYDRO-4H-CHROMEN-4-ONE 2,3-DIHYDRO-1-BENZOPYRAN-4-ONE 2,4-DIHYDRO-1-BENZOPYRAN-4-ONE 4-CHROMANONE 4-Chlomanone ChondrotinSulfateBp98 4-Chromanone, 98+% 4-Chromanone,99% dihydrobenz-γ-pyrone 2H-1-Benzopyran-4(3H)-one 2,3-dihydrochroMen-4-one 4H-1-Benzopyran-4-one, 2,3-dihydro- 2,3-Dihydro-1-benzopyran-4-one, 2,3-Dihydro-4H-chromen-4-one 4-Chromanone ISO 9001:2015 REACH 4-Chromanone > JRH-01801, Chroman-4-one, 97% Isochromanone 2,3-Dihydro-4H-1-benzopyran-4-one CHROMANONE CHROMAN-4-ONE 491-37-2 Heterocyclic Building Blocks KETONE Building Blocks Benzopyrans Fused Ring Systems