Firebrake ZB
Flame Retardant ZB
CAS: 1332-07-6
Molecular Formula: B2O6Zn3
Firebrake ZB - Names and Identifiers
| Name | Flame Retardant ZB |
| Synonyms | borax2335 Zinc borate Firebrake ZB flameretardantzb Flame Retardant ZB zinc hydrogen borate ZINC BORATE EXTRA PURE ZINC BORATE 3.5 HYDRATE Zinc Borate,Fiame Retardant ZINC BORATE OXIDE 3.5 HYDRATE Zinc Borate, HeMiheptahydrate |
| CAS | 1332-07-6 |
| EINECS | 215-566-6 |
| InChI | InChI=1/BHO3.Zn/c2-1(3)4;/h2H;/q-2;+2 |
Firebrake ZB - Physico-chemical Properties
| Molecular Formula | B2O6Zn3 |
| Molar Mass | 313.79 |
| Density | 3.64 g/cm3 |
| Melting Point | 980 °C |
| Appearance | White solid |
| Storage Condition | Room Temprature |
| Physical and Chemical Properties | Character random (or rhomboid) white or light yellow powder. solubility insoluble in water, ethanol, n-butanol, benzene, acetone, soluble in hydrochloric acid, sulfuric acid, dimethyl sulfoxide. |
| Use | Used as Inorganic Additives, non-toxic flame retardants, used in plastics, rubber, textile, coatings and other industries |
Firebrake ZB - Risk and Safety
| Toxicity | Zinc borate 2ZnO3B2O3·3.5H2O has an acute oral toxicity in rats LD50 >10000 mg/kg body weight and acute dermal toxicity in rabbits LD50>10000 mg/kg body weight. It is not a skin irritant and gives a negative response in the Ames mutagenicity test (Kirk-Othmer, 1994). |
Firebrake ZB - Upstream Downstream Industry
Firebrake ZB - Reference Information
Open Data Unverified Data
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| flame retardant | zinc borate is an inorganic additive flame retardant, which is characterized by good thermal stability, I .e. flame retardant and smoke abatement. it can replace antimony trioxide in some products, and can also be used in conjunction with other inorganic flame retardants, with better effect. This product is widely used in rubber, plastic, cable, wood, national defense and military products, coatings, tarpaulins and other industries. Zinc borate can be used as a multifunctional synergistic additive for antimony oxide or other halogen flame retardants, which can effectively improve the flame retardant performance, reduce the generation of smoke during combustion, and can adjust the physical, mechanical, electrical and other aspects of rubber and plastic products Performance. zinc borate is widely used in PVC materials, such as carpets, conveyor belts, wires and cables, etc. It is also used in engineering plastics with halogen-free aluminum hydroxide and magnesium hydroxide as flame retardant systems, such as PE,PP,ABS, etc. It is also used in expansion coatings, ceramic glazes, fungicides, wallpaper treatment, opal glass and other fields. |
| flame retardant mechanism | zinc borate can exert flame retardant effect in condensed phase and gas phase at the same time. Zinc borate melts at high temperature to form a glassy coating, which is then dehydrated at high temperature. The evaporation of water and other effects of water vapor help to make the combustion self-extinguish. At the same time, dehydrated zinc borate can promote the formation of inorganic carbon layer, which is not only difficult to ignite and burn, but also has an isolation effect. When zinc borate is used together with a halogen-based flame retardant, it can react with the flame retardant itself and the hydrogen halide produced by the decomposition of the flame retardant to generate zinc compounds and boron compounds. These compounds can promote charcoal formation. The resulting boron trihalide is a Lewis acid, which can promote the cross-linking of polymers and delay the decomposition of polymers into flammable gases. At the same time, boron trihalide can enter the gas phase to capture free radicals and release halogens, which is a combustion inhibitor. 1) when the ZB-2335 of zinc borate is heated to above 300 ℃, crystal water is released, a large amount of heat energy is absorbed, and the combustion surface temperature is reduced. 2) The released moisture dilutes the oxygen in the air and inhibits the burning reaction. 3) The final production of B2O3 glassy film, covering the polymer, plays the role of heat insulation and oxygen resistance. 4) compounded with organic halide, at the combustion temperature, FB decomposes and generates ZnX2, ZnX, H3BO3(X = C1, Br) with halogen, covering the surface of the combustion substance, isolating the air. And BX3 in the combustion, the release of HX to prevent the chain reaction between high activity free radicals has a catalytic effect, so as to achieve the single FB better flame retardant effect. |
| use | used for flame retardant treatment of various plastics, rubber, coatings and fiber fabrics used for waterproof, flame retardant, ceramic glaze, anti-mildew and sterilization of textiles. used as inorganic additives, non-toxic flame retardants, used in plastics, rubber, textiles, coatings and other industries used in various engineering plastics, rubber products, coatings, fabrics and other flame retardants, but also used in medicine, waterproof fabrics, ceramic glaze, coating anti-mold agents, sterilization anti-mold agents, fungicides and so on. |
| production method | zinc oxide method puts a certain proportion of zinc oxide and boric acid into a boric acid crystallizer in advance and reacts at 80~100 ℃ for 5~7 h. Then filter and wash, dry and crush to obtain the finished zinc borate. The reaction is as follows: Zinc hydroxide method adds zinc hydroxide and boric acid to the reactor in the presence of water and other organic solvents. React at 100 ℃ for 6~10 h. The solids obtained after filtration are washed with hot water and dried to obtain a finished zinc borate product. Its |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 19:43:38
Firebrake ZB - Nature
Open Data Verified Data
white crystal powder, non-toxic. Soluble in hydrochloric acid, sulfuric acid, dimethyl sulfoxide. Slightly soluble in hot water above 38 ℃. Insoluble in cold water and ethanol, n-butanol, benzene and acetone and other organic solvents. Loss of crystal water above 300 °c. Good thermal stability. With flame retardant, smoke, arc extinguishing performance.
Last Update：2025-06-10 22:55:16
Firebrake ZB - Preparation Method
Open Data Verified Data
- zinc oxide method: In the crystallizer containing a certain concentration of boric acid medium solution, put a certain ratio of zinc oxide and boric acid, react at 80~100 ℃ for 5~7H, after filtration and washing, the filter cake is dried and pulverized to obtain a zinc Borate finished product.
- zinc hydroxide method: zinc hydroxide and boric acid are added to the reactor in the presence of water and other organic solvents, and the temperature is maintained at 100 ° C. For 6 to 10 hours. The feed liquid was filtered, and the obtained solid was washed with hot water and dried to obtain a zinc Borate finished product.
- Borax method: Zinc Borate was prepared by reacting zinc sulfate, borax and zinc oxide at a molar ratio of 7:7: 1 at 95 °c.
Last Update：2025-06-10 22:55:16
Firebrake ZB - Introduction
Insoluble in water, ethanol, n-butanol, benzene, acetone, soluble in hydrochloric acid, sulfuric acid, dimethyl sulfoxide. Good thermal stability. Easy to decompose. Non-toxic.
Last Update：2022-10-16 17:13:26
Firebrake ZB - Application
Open Data Verified Data
Zinc Borate is an inorganic additive flame retardant, which is characterized by good thermal stability, that is, flame retardant and smoke suppression. It can be used alone, and can also be used in conjunction with other flame retardants such as antimony trioxide, and the flame retardant effect is better. Widely used in rubber and PVC, ABS, chlorinated polyethylene, chemical fiber, paint, paint.
Last Update：2025-08-19 16:24:40
Firebrake ZB - Safety
Open Data Verified Data
non-toxic, non-corrosive. Packed with a woven bag of inner village polyethylene plastic film bag. 25kg net weight per bag. Should be stored in a clean and dry warehouse, storage and transport should avoid rain. Do not store and mix with acids.
Last Update：2025-06-10 22:55:16
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View History
Firebrake ZB
Triammonium
NSC 128921
4-Chloro-2-iodophenol
福美钠,95%
Saxagliptin impurity E
clopidogrel sulphate
diniobium pentaoxide
Hydrogen sulfide,liquid
FEMA 3488
Triammonium
NSC 128921
4-Chloro-2-iodophenol
福美钠,95%
Saxagliptin impurity E
clopidogrel sulphate
diniobium pentaoxide
Hydrogen sulfide,liquid
FEMA 3488
Raw Materials for Firebrake ZB