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
• Article Data: 5

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

Description

Tetrabromobisphenol A bis(2,3-dibromopropyl) ether is part of the group of Brominated and Chlorinated Flame Retardants. FR-50 is a flame retardant containing both aromatic and aliphatic bromine. It's is designed for use in polyolefin and styrenic resins, providing a UL94 V-2 rating. It can also be applied to polypropylene, to reach a V-0 rating.

Chemical Properties

White powder

Uses

Different sources of media describe the Uses of 21850-44-2 differently. You can refer to the following data:
1. Bis(2,3-dibromopropoxy)tetrabromobisphenol A is a the DBP-based flame retardant for polyolefins and polymers, including PP, high-density polyethylene (HDPE), and low-density polyethylene (LDPE). Bis(2 ,3-dibromopropoxy)tetrabromobisphenol A is also used in fabricated plastic sheet materials for application in the formation of a part of many electrical cabinets.
2. tetrabromobisphenol A bis(dibromopropyl ether),OBE, is an additive brominated flame retardants, can be widely used in polyolefin (pp), high impact polystyrene (HIPS) and ABS and other products.

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

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

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.