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Tetrabromophthalic anhydride and Tetrabromophthalate diol are marketed by LANXESS Solutions US Inc. under the trade names PHT4 and PHT4-Diol.
They are reactive flame retardants that are used to reduce the ignition and flammability characteristics of unsaturated polyester resins (PHT4) and polyurethanes (PHT4-
Diol).
Polyester resins and polyurethanes are derived from petroleum products and are typically highly flammable, if no flame retardants are used during manufacturing.
CAS: 632-79-1
MF: C8Br4O3
MW: 463.7
EINECS: 211-185-4
Synonyms
1,3-Isobenzofurandione, 4,5,6,7-tetrabromo-;1,3-Isobenzofurandione,4,5,6,7-tetrabromo-;3,4,5,6-Tetrabromophthalic anhydride;3,4,5,6-tetrabromophthalicanhydride;3-Isobenzofurandione,4,5,6,7-tetrabromo-1;4,5,6,7-Tetrabromo-2-benzofuran-1,3-dione;4,5,6,7-tetrabromo-3-isobenzofurandione;TETRABROMOPHTHALIC ANHYDRIDE
PHT4 and Tetrabromophthalate diol are used in the manufacture of polyester and polyurethane products because they can decrease the possibility of the ignition of the base plastic, and, if ignition does occur, can slow the spread of fire and allow more escape and response time.
PHT4 and Tetrabromophthalate diol will chemically bond with other chemicals used to make polyester or polyurethane to form new unique materials.
PHT4 and Tetrabromophthalate diol are handled in industrial facilities designed for the manufacture of polyester or polyurethane products that can benefit from reduced flammability characteristics.
Tetrabromophthalate diol is a cyclic dicarboxylic anhydride and a member of 2-benzofurans.
Tetrabromophthalate diol is used as a reactive flame retardant for polyesters, unsaturated polyesters, and epoxy resins.
Used as an additive flame retardant, polypropylene, polyethylene and ABG resins, as well as for other engineering plastics and synthetic materials, and also for the synthesis of other fine chemicals.
PHT4 and Tetrabromophthalate diol are produced in dedicated manufacturing units.
During production, the raw materials are combined in production units designed for the manufacture of chemicals.
The resulting reaction products are further refined to meet their respective specifications and then packaged in bulk, semi-bulk and smaller packages for distribution to customers that use Tetrabromophthalate diol to provide flame retardant properties to their products through a transformation reaction.
Tetrabromophthalate diol is a chemical compound with various industrial applications due to its unique properties.
Tetrabromophthalate diol Chemical Properties
Melting point: 269-271 °C (lit.)
Boiling point: 540.5±50.0 °C(Predicted)
Density: 2.87
Vapor pressure: 0.11 mm Hg ( 180 °C)
Refractive index: 1.5000 (estimate)
Storage temp.: Store below +30°C.
Solubility: Chloroform (Slightly), DMSO (Slightly, Sonicated), Methanol (Sparingly, Heated,
Form: Powder
Color: White to light yellow
Water Solubility: hydrolysis
Sensitive: Moisture Sensitive
BRN: 18908
Stability: Moisture Sensitive
LogP: 2.27 at 40℃
CAS DataBase Reference: 632-79-1(CAS DataBase Reference)
NIST Chemistry Reference: Phthalic anhydride, tetrabromo-(632-79-1)
EPA Substance Registry System: Tetrabromophthalate diol (632-79-1)
Uses
Tetrabromophthalate diol is a brominated flame retardant used as additives in plastics to decrease the rate of combustion of these materials, leading to greater consumer safety.
Tetrabromophthalate diol is a reactive flame retardant, can be used for polyester resin, epoxy resin, flame retardant, also can be used for flame retardant for PS, PP, PE, flame-retardant ABS resin.
Tetrabromophthalate diol is used as a raw material in the manufacture of PHT4-Diol.
Tetrabromophthalate diol is also used to produce unsaturated polyester resins to reduce flammability.
Similarly, Tetrabromophthalate diol is used primarily to produce rigid polyurethane foam with a reduced potential to ignite.
The polymers where flame retardants are used are constructed using petroleum products or organic materials and consequently can be highly flammable, if left unmodified.
After
the polyester or polyurethane are modified through the addition of PHT4 or Tetrabromophthalate diol to the product mix, the base materials are much less likely to ignite.
If ignition does occur, the fire will spread more slowly than if the base polymer was left unmodified.
Industrial Use
PHT4 and Tetrabromophthalate diol are used to manufacture unsaturated polyester resin or rigid polyurethane foam products respectively.
They are typically used in well-controlled manufacturing facilities by people trained in the hazards of polymer additives and chemicals.
PHT4 and Tetrabromophthalate diol used in a manufacturing setting are handled using best practice techniques developed to minimize any potential risk of exposure to liquids, vapors
or solids.
Typically, use sites utilize engineered systems to minimize the potential for exposure to all the chemicals used in the process.
Unplanned releases or spills of PHT4 and Tetrabromophthalate diol are not expected to represent a life threatening situation, due to their chemical characteristics.
In any spill or release incident, all non-essential personnel are immediately evacuated upwind of the spilled material.
All personnel involved with correcting a spill situation are trained and properly equipped with the required personal protective equipment.
Reactivity Profile
Tetrabromophthalate diol reacts exothermically with water.
This reaction is expected to be slow, but can become vigorous if local heating accelerates Tetrabromophthalate diol.
Reaction with water is accelerated by acids.
Incompatible with acids, strong oxidizing agents, alcohols, amines, and bases.
