21850-44-2

Basic information

• Product Name: Tetrabromobisphenol A bis(dibromopropyl ether)
• Synonyms: BDDP;Octabromoether;Octabromoether(Bddp);Benzene, 1,1-(1-methylethylidene)bis3,5-dibromo-4-(2,3-dibromopropoxy)-;bromkal 66-8;tetrabromobisphenol a dibromopropyl ether;1,1′-(Isopropyliden)bis(3,5-dibrom-4-(2,3-dibrompropoxy)benzol);4,4'-Isopropylidenebis(2,6-Dibromophenyl 2,3-Dibromopropyl Ether)
• CAS NO: 21850-44-2
• Molecular Formula: C21H20Br8O2
• Molecular Weight: 943.61
• EINECS: 244-617-5
• Product Categories: Flame retardant series
• Mol File: 21850-44-2.mol

Chemical Properties

• Melting Point: 117°C
• Boiling Point: 676.5 °C at 760 mmHg
• Flash Point: 287.7 °C
• Appearance: /
• Density: 2.169 g/cm³
• Vapor Pressure: 2.14E-17mmHg at 25°C
• Refractive Index: 1.646
• Storage Temp.: Hygroscopic, -20°C Freezer, Under inert atmosphere
• Solubility: Chloroform (Slightly), DMSO (Slightly), Methanol (Slightly)
• Water Solubility: 144ng/L at 20℃
• CAS DataBase Reference: Tetrabromobisphenol A bis(dibromopropyl ether)(CAS DataBase Reference)
• NIST Chemistry Reference: Tetrabromobisphenol A bis(dibromopropyl ether)(21850-44-2)
• EPA Substance Registry System: Tetrabromobisphenol A bis(dibromopropyl ether)(21850-44-2)

Safety Data

• Statements: 36/37/38
• Safety Statements: 26-36/37/39
• RIDADR: 3152
• HazardClass: 9
• PackingGroup: II
• Hazardous Substances Data: 21850-44-2(Hazardous Substances Data)

Usage

Uses

Used in Plastic Industry:
Tetrabromobisphenol A bis(dibromopropyl ether) is used as an additive brominated flame retardant for enhancing the fire resistance of materials. It is particularly effective in polyolefin (PP), high-density polyethylene (HDPE), and low-density polyethylene (LDPE), providing a UL94 V-2 rating.
Used in Electrical Cabinets:
Tetrabromobisphenol A bis(dibromopropyl ether) is used as a flame retardant in fabricated plastic sheet materials for the formation of electrical cabinets, ensuring safety and reducing the risk of fire.
Used in Styrenic Resins:
Tetrabromobisphenol A bis(dibromopropyl ether) is used as a flame retardant in styrenic resins, such as high impact polystyrene (HIPS) and ABS, to improve their fire resistance and safety.
Used in Polypropylene:
Tetrabromobisphenol A bis(dibromopropyl ether) is used as a flame retardant in polypropylene to achieve a V-0 rating, which indicates a higher level of fire resistance compared to the V-2 rating.

Flammability and Explosibility

Flammable

Synthesis

Add bromine reaction and matting: in reactor, squeeze into 780 kilograms of chloroforms, get tetrabromo bisphenol A diene propyl ether and be dissolved in the chloroform solvent for 400 kilograms.Squeeze into 216 kilograms of bromines after in the bromine header tank, adding 18 kilograms of aluminum bromides.Start reactor and stir, open the reactor coolant valve, keep material in reactor, open bromine header tank baiting valve, in reactant, splash into bromine and catalyzer in the material continuously at 15～25 ℃.Drip bromine and catalyzer and finish off-response still coolant valve.40～45 ℃ of slakings 1 hour.Add mass percent in the reactor and be 150 kilograms of 3% soda ash salt brine solutions, stirred 1 hour, tell washing soda salt solution, the clear water secondary washing is added in the back, tells washing water, makes the chloroformic solution of two (2, the 3-dibromopropyl) ethers of tetrabromo-bisphenol.Spraying desolventizing and finished product operation: in the washing still, inject 1200 kilograms in clear water, open the steam system and the stirring of washing still, keep near 60 ℃ of the water lotion temperature.Open the coolant system of atomizing precipitation tower middle part water vapor intake valve and atomizing precipitation top of tower interchanger.Open the tetrabromo-bisphenol two (2 of atomizing precipitation tower top injector, the 3-dibromopropyl) ether chloroformic solution spraying feed valve, open baiting valve and still bottomspump at the bottom of the still of reactor, in atomizing precipitation tower, spray tetrabromo-bisphenol two (2, the 3-dibromopropyl) ether chloroformic solution, adjust two (2, the 3-dibromopropyl) the ether chloroformic solution input speeds of material pump discharge pressure and tetrabromo-bisphenol, make spray effect reach necessary requirement.Two (2, the 3-dibromopropyl) the ether particle gravitates of tetrabromo-bisphenol that remove behind the chloroform solvent fall into the washing still, keep washing still temperature of charge and continue 2 hours for 60 ℃, finish spray atomization, the imitative solvent of dechlorination, granulation powder process, matting process.Open the baiting valve of washing at the bottom of the still, emit in the washing still material and go into whizzer, carry out centrifuge dripping, filtration cakes torrefaction, make 712 kilograms of two (2, the 3-dibromopropyl) ether finished products of tetrabromo-bisphenol, yield 98.8%.Analysis records 109～111 ℃ of fusing points, and the HPLC purity assay is 98.37%, and the GB2917-82 congo red method records 228 ℃ of heat decomposition temperatures.

InChI:InChI=1/C21H20Br8O2/c1-21(2,11-3-15(26)19(16(27)4-11)30-9-13(24)7-22)12-5-17(28)20(18(29)6-12)31-10-14(25)8-23/h3-6,13-14H,7-10H2,1-2H3

Upstream product

• 80-05-7 BPA 
• 107-05-1 3-chloroprop-1-ene 
• 106-95-6 allyl bromide 
• 557-98-2 2-chloropropene 
• 2211-70-3 2-chloro-but-1-ene 
• 79-94-7 Tetrabromobisphenol A 

Relevant articles and documents

Method for preparing methyl octabromo-ether flame retardant

The invention discloses a method for preparing a methyl octabromo-ether flame retardant. The method comprises the following steps: enabling bisphenol A and an etherifying agent to have etherification reaction so as to generate a bisphenol A diallyl ether

Bromine-containing organic compounds, bromine-containing organic compound-containing composition and method of manufacturing the same

PROBLEM TO BE SOLVED: To provide a bromine-containing organic compound which imparts high flame retardancy and thermal stability to a resin when it is compounded with the resin. SOLUTION: The bromine-containing organic compound is represented by formula (1), a flame retardant contains the bromine-containing organic compound, and a flame retardant resin composition contains the flame retardant and a resin. In formula, A represents one of -CH2-, -C(CH3)2-, and -S-, each of R1and R2represents a hydrogen atom or a 1-6C saturated hydrocarbon group, R3represents a 1-6C saturated hydrocarbon group, Y represents a halogen atom, and each of m and n represents an integer of 1-4. COPYRIGHT: (C)2013,JPOandINPIT

Method for purifying a bromine compound

A method for purifying a bromine compound by depositing the bromine compound represented by the following general formula (1) as solid particles from a crude solution containing the bromine compound: wherein(i) the crude solution is supplied into the slurry containing the particles of the bromine compound;(ii) the concentration of the particles of the bromine compound in the slurry is maintained at a predetermined range;(iii) the solvent contained in the slurry is a mixed solvent of a good solvent and a poor solvent and the ratio of the good solvent to the poor solvent is maintained at a predetermined value; and(iv) the solid particles of the bromine compound are separated from the slurry.

Bromine compound production method

Method of producing a bromine compound having an aliphatic unsaturated bond which includes reacting a compound having an aliphatic unsaturated bond represented by the following general formula (1) with bromine: to produce a bromine compound represented by the following formula (2): wherein Ar1, Ar2 and Y are the same as defined in the above general formula (1) , and R3 and R4 are groups obtained by saturating the unsaturated groups of R1 and R2 in the above general formula (1) with bromine, respectively. The reaction is carried out in the presence of a solvent which is inactive in the reaction, and a substantial amount of the heat of reaction is removed from a reaction system by the vaporization of the solvent or bromine. A high-purity bromine compound in high yield which is useful as flame retardant, can be obtained.

Bromine compound production method

A high-purity bromine compound which is useful as flame retardant, can be obtained industrially advantageously by a process comprising reacting bromine with an aliphatically unsaturated compound of formula (1) : R1-O-Ar1-Y-Ar2-O-R2to produce a bromine compound of formula (2): R3-O-Ar1-Y-Ar2-O-R4wherein in each formula Ar1and Ar2are independently a C5-16aromatic hydrocarbon or a C5-12saturated alicyclic hydrocarbon, and Y is a C1-6saturated hydrocarbon, a sulfone, sulfide, ketone or C2-6alkylene oxide or is a single bond; R1and R2are each independently a C2-11hydrocarbon group which is at least partially unsaturated; and R3and R4are groups obtained by saturating with a bromine atom the unsaturated groups of R1and R2respectively, wherein the reaction is carried out in the presence of a solvent which is inactive in the reaction, and a substantial amount (e.g. 80% or more) of reaction heat is removed from the reaction system by the vaporization heat of the solvent or bromine.