3278-89-5 Usage
Application
1,3,5-Tribromo-2-(2-propen-1-yloxy)-benzene is used as a brominated flame retardant.Not a dangerous good if item is equal to or less than 1g/ml and there is less than 100g/ml in the package.
Synthesis
To the ethanol solution of the sodium tribromophenolate salt prepared in the step 1), the dispersing agent sodium stearate 2.5 g is added.And catalyst II phenyl triethyl ammonium chloride 5.6g,The temperature is raised to 75 ° C to reflux the reaction.Further, 1000 ml of an ethanol solution of chloropropene having a volume ratio of chloropropene to ethanol of 1:5 was slowly added thereto, and then the reaction was kept at 75 ° C for 6.5 h until the end.Then, the temperature is lowered to 7 ° C in sequence, and then suction filtration is performed to recover the ethanol solution.After washing the filter cake with water, the filter cake was dried at 60 ° C.2,4,6-Tribromophenyl allyl ether was obtained as a white powdery solid in a yield of 96.2%.
Check Digit Verification of cas no
The CAS Registry Mumber 3278-89-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,2,7 and 8 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 3278-89:
(6*3)+(5*2)+(4*7)+(3*8)+(2*8)+(1*9)=105
105 % 10 = 5
So 3278-89-5 is a valid CAS Registry Number.
InChI:InChI=1/C9H7Br3O/c1-2-3-13-9-7(11)4-6(10)5-8(9)12/h2,4-5H,1,3H2
3278-89-5Relevant articles and documents
Method for synthesizing 2,4,6-tribromophenyl allyl ether
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Page/Page column 4-6, (2019/01/16)
The invention relates to a method for synthesizing 2,4,6-tribromophenyl allyl ether, solving the technical problems of the prior art, including the complicated synthesis process, the slow etherification reaction progress, serious hydrolysis of chloropropene, low product yield, deep product color and low purity affecting flame retardant performance. The method for synthesizing the 2,4,6-tribromophenyl allyl ether includes the following steps in sequence: 1) adding a first catalyst into an organic solvent of phenol, adding a brominating agent at the temperature of 15-20 DEG C, increasing the temperature to 25-30 DEG C and preserving the heat to obtain tribromophenol, and adding the tribromophenol into an ethanol solution of sodium ethoxide to obtain an ethanol solution of sodium tribromophenolate; 2) adding a dispersant and a second catalyst into the ethanol solution of the sodium tribromophenolate prepared in the step 1), dropwise adding an ethanol solution of the chloropropene, and preserving the heat until reaction completion to obtain the 2,4,6-tribromophenyl allyl ether. The method is widely applied to the synthesis field of flame retardants.
