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4-Chromanone Suppliers list
Company Name: Capot Chemical Co.,Ltd.
Tel: +86-571-85586718
Products Intro: Product Name:4-Chromanone
Purity:98%(Min,HPLC) Package:100g;1kg;5kg,10kg,25kg,50kg
Company Name: Henan DaKen Chemical CO.,LTD.
Tel: +86-371-55531817
Products Intro: Product Name:4-Chromanone
Purity:99.00% Package:100g,500g,1KG,10KG,100KG
Company Name: Henan Tianfu Chemical Co.,Ltd.
Tel: 0371-55170693
Products Intro: CAS:491-37-2
Purity:99% Package:500G;1KG;5KG;25KG
Company Name: career henan chemical co
Tel: +86-371-86658258
Products Intro: Product Name:4-Chromanone
Purity:99% Package:1kg;1USD
Company Name: Changzhou Ansciep Chemical Co., Ltd.
Tel: +86 519 86305871
Products Intro: CAS:491-37-2
Purity:0.99 Package:100g, 500g, 1kg, 25kg, 50kg, 200kg

Lastest Price from 4-Chromanone manufacturers

  • 4-ChroManone
  • US $0.01-1.00 / KG
  • 2020-04-28
  • CAS:491-37-2
  • Min. Order: 1KG
  • Purity: 99%
  • Supply Ability: 50 tons
  • 4-Chromanone
  • US $1.00 / kg
  • 2019-07-06
  • CAS:491-37-2
  • Min. Order: 1kg
  • Purity: 99%
  • Supply Ability: 100KG
4-Chromanone Basic information
Product Name:4-Chromanone
Product Categories:Fused Ring Systems
Mol File:491-37-2.mol
4-Chromanone Structure
4-Chromanone Chemical 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.)
Fp >230 °F
storage temp. 0-10°C
form Crystalline Powder, Crystals or Low Melting Mass
color White to yellow
Water Solubility Slightly soluble in water.
BRN 124652
CAS DataBase Reference491-37-2(CAS DataBase Reference)
NIST Chemistry Reference4H-1-Benzopyran-4-one, 2,3-dihydro-(491-37-2)
EPA Substance Registry System4H-1-Benzopyran-4-one, 2,3-dihydro- (491-37-2)
Safety Information
Hazard Codes Xi
Risk Statements 33-36/37/38
Safety Statements 24/25-36-26
WGK Germany 2
RTECS DJ2981225
HazardClass IRRITANT
HS Code 29329990
MSDS Information
4-Chromanone English
SigmaAldrich English
ACROS English
ALFA English
4-Chromanone Usage And Synthesis
Chemical Propertieswhite to light yellow crystal powder
Purification MethodsIt 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 materialsSodium hydroxide-->Phosphoric acid-->Phenol-->Phosphorus pentoxide-->3-Bromopropionic acid
Tag:4-Chromanone(491-37-2) Related Product Information
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