ChemicalBook > Product Catalog >Inorganic chemistry >Elementary substance >Boron

Boron

Boron Suppliers list
Company Name: Henan DaKen Chemical CO.,LTD.
Tel: +86-371-55531817
Email: info@dakenchem.com
Products Intro: Product Name:Boron
CAS:7440-42-8
Purity:99.00% Package:100g,500g,1KG,10KG,100KG
Company Name: Henan Tianfu Chemical Co.,Ltd.
Tel: 0371-55170693
Email: info@tianfuchem.com
Products Intro: CAS:7440-42-8
Purity:99% Package:500G;1KG;5KG;25KG
Company Name: Mainchem Co., Ltd.
Tel: +86-0592-6210733
Email: sales@mainchem.com
Products Intro: Product Name:Boron
CAS:7440-42-8
Company Name: Forsman Scientific ( Beijing ) Co., Ltd.  Gold
Tel: +86-10-6464 6565
Email: info@forsman.com.cn
Products Intro: Product Name:Boron powder , crystalline (B)
CAS:7440-42-8
Purity:50μm Package:1kg;5kg Remarks:1μm;5 μm;50μm
Company Name: Yingkou Tianyuan Chemical Research Institute Co., Ltd.  Gold
Tel: 0755-26406100 13504178931
Email: 2546677677@qq.com
Products Intro: Product Name:Boron
CAS:7440-42-8
Purity:>= 90.0~99.999999 Package:1KG/2200.00;
Boron Basic information
Product Name:Boron
Synonyms:Boron powder, crystalline, -4+40 mesh, Puratronic, 99.9999% (metals basis);Boron powder, crystalline (99.5%);Boron, amorphous powder -325 mesh 90%;Boron 99.99%;3-(1-Methylethyl)-2,1,3-benzothiadiazin-4(3H)-one-13C6 2,2-Dioxide;3,4-Dihydro-3-isopropyl-1H-2,1,3-benzothiadiazin-4-one-13C6 2,2-Dioxide;3-Isopropyl-1H-2,1,3-benzothiadiazin-4(3H)-one-13C6 2,2-Dioxide;Basagran 480-13C6
CAS:7440-42-8
MF:B
MW:10.81
EINECS:231-151-2
Product Categories:metal or element;Boron;Catalysis and Inorganic Chemistry;Chemical Synthesis;Electronic Chemicals;Micro/Nanoelectronics;Pure Elements;Industrial/Fine Chemicals;Inorganics
Mol File:7440-42-8.mol
Boron Structure
Boron Chemical Properties
Melting point 2300°C
Boiling point 2550°C
density 2.34 g/mL at 25 °C(lit.)
storage temp. Storage temperature: no restrictions.
solubility H2O: soluble
form pieces
color Dark gray
resistivity1.5E12 μΩ-cm, 20 °C
Water Solubility insoluble H2O [MER06]
Merck 13,1333
Stability:Stable. Substances to be avoided include strong oxidizing agents and strong acids. May decompose on exposure to air - store under nitrogen. Highly flammable.
InChIKeyUORVGPXVDQYIDP-UHFFFAOYSA-N
CAS DataBase Reference7440-42-8(CAS DataBase Reference)
NIST Chemistry ReferenceBoron(7440-42-8)
EPA Substance Registry SystemBoron(7440-42-8)
Safety Information
Hazard Codes Xn,F
Risk Statements 22-11-63-62
Safety Statements 16-24/25-45-36/37/39-27-26
RIDADR UN 3178 4.1/PG 2
WGK Germany -
RTECS ED7350000
TSCA Yes
HazardClass 4.1
PackingGroup III
HS Code 28045000
Hazardous Substances Data7440-42-8(Hazardous Substances Data)
MSDS Information
ProviderLanguage
Boron English
SigmaAldrich English
ACROS English
ALFA English
Boron Usage And Synthesis
DescriptionBoron was discovered by Sir Humphry Davy and J.L. Gay-Lussac in 1808. It is a trivalent non-metallic element that occurs abundantly in the evaporite ores borax and ulexite. Boron is never found as a free element on Earth. Boron appears as charcoal-grey pieces or black powder or as crystalline; is a very hard, black material with a high melting point; and exists in many polymorphs. Boron has several forms, and the most common one is amorphous boron, a dark powder, non-reactive to oxygen, water, acids, and alkalis. It reacts with metals to form borides. Boron is an essential plant micronutrient. Sodium borate is used in biochemical and chemical laboratories to make buffers. Boric acid is produced mainly from borate minerals by the reaction with sulphuric acid. Boric acid is an important compound used in textile products. The most economically important compound of boron is sodium tetraborate decahydrate or borax, used for insulating fibreglass and sodium perborate bleach. Compounds of boron are used in organic synthesis, in the manufacture of a particular type of glasses, and as wood preservatives. Boron filaments are used for advanced aerospace structures, due to their high strength and light weight.
Chemical Propertiescharcoal-grey pieces or black powder
Chemical PropertiesIn 1808, Sir Humphry Davy and J. L. Gay-Lussac discovered boron. It is a trivalent, nonmetallic element that occurs abundantly in the evaporite ores, borax and ulexite. Boron is never found as a free element on Earth. Boron as a crystalline is a very hard, black material with a high melting point, and exists in many polymorphs. Boron has several forms, the most common form being amorphous boron, a dark powder, non-reactive to oxygen, water, acids, and alkalis. It reacts with metals to form borides. Boron is an essential plant micronutrient. Sodium borate is used in biochemical and chemical laboratories to make buffers. Boric acid is produced mainly from borate minerals by the reaction with sulfuric acid. Boric acid is an important compound used in textile products. Compounds of boron are used in organic synthesis, in the manufacture of special types of glasses, and as wood preservatives. Boron fi laments are used for advanced aerospace structures owing to their high strength and light weight. It is used as an antiseptic for minor burns or cuts and is sometimes used in dressings. Boric acid was fi rst registered in the United States in 1948 as an insecticide for control of cockroaches, termites, fi re ants, fl eas, silverfi sh, and many other insects. It acts as a stomach poison affecting the insects’ metabolism, and the dry powder is abrasive to the insects’ exoskeleton. Boric acid is generally considered to be safe for use in household kitchens to control cockroaches and ants. The important use of metallic boron is as boron fi ber. Borate-containing minerals are mined and processed to produce borates for several industrial uses, i.e., glass and ceramics, soaps and detergents, fi re retardants and pesticides. The fi bers are used to reinforce the fuselage of fi ghter aircraft, e.g., the B-1 bomber. The fi bers are produced by vapor deposition of boron on a tungsten fi lament. Pyrex is a brand name for glassware, introduced by Corning Incorporated in 1915. Originally, Pyrex was made from thermal shock-resistant borosilicate glass. The common borate compounds include boric acid, sodium tetraborates (Borax), and boron oxide
Chemical PropertiesBoron is a yellow or brownish-black powder and may be either crystalline or amorphous. It does not occur free in nature and is found in the minerals borax, colemanite, boronatrocalcite, and boracite.
HistoryBoron compounds have been known for thousands of years, but Boron was not discovered until 1808 by Sir Humphry Davy and by Gay-Lussac and Thenard. The element is not found free in nature, but occurs as orthoboric acid usually in certain volcanic spring waters and as borates in borax and colemanite. Ulexite, another boron mineral, is interesting as it is nature’s own version of “fiber optics.” Important sources of boron are the ores rasorite (kernite) and tincal (borax ore). Both of these ores are found in the Mojave Desert. Tincal is the most important source of boron from the Mojave. Extensive borax deposits are also found in Turkey. Boron exists naturally as 19.9% 10B isotope and 80.1% 11B isotope. Ten other isotopes of boron are known. High-purity crystalline boron may be prepared by the vapor phase reduction of boron trichloride or tribromide with hydrogen on 4-6 The Elements electrically heated filaments. The impure, or amorphous, boron, a brownish-black powder, can be obtained by heating the trioxide with magnesium powder. Boron of 99.9999% purity has been produced and is available commercially. Elemental boron has an energy band gap of 1.50 to 1.56 eV, which is higher than that of either silicon or germanium. It has interesting optical characteristics, transmitting portions of the infrared, and is a poor conductor of electricity at room temperature, but a good conductor at high temperature. Amorphous boron is used in pyrotechnic flares to provide a distinctive green color, and in rockets as an igniter. By far the most commercially important boron compound in terms of dollar sales is Na2B4O7 · 5H2O. This pentahydrate is used in very large quantities in the manufacture of insulation fiberglass and sodium perborate bleach. Boric acid is also an important boron compound with major markets in textile fiberglass and in cellulose insulation as a flame retardant. Next in order of importance is borax (Na2B4O7 · 10H2O) which is used principally in laundry products. Use of borax as a mild antiseptic is minor in terms of dollars and tons. Boron compounds are also extensively used in the manufacture of borosilicate glasses. The isotope boron-10 is used as a control for nuclear reactors, as a shield for nuclear radiation, and in instruments used for detecting neutrons. Boron nitride has remarkable properties and can be used to make a material as hard as diamond. The nitride also behaves like an electrical insulator but conducts heat like a metal. It also has lubricating properties similar to graphite. The hydrides are easily oxidized with considerable energy liberation, and have been studied for use as rocket fuels. Demand is increasing for boron filaments, a high-strength, lightweight material chiefly employed for advanced aerospace structures. Boron is similar to carbon in that it has a capacity to form stable covalently bonded molecular networks. Carboranes, metalloboranes, phosphacarboranes, and other families comprise thousands of compounds. Crystalline boron (99.5%) costs about $6/g. Amorphous boron (94–96%) costs about $1.50/g. Elemental boron and the borates are not considered to be toxic, and they do not require special care in handling. However, some of the more exotic boron hydrogen compounds are definitely toxic and do require care.
UsesIn nuclear chemistry as neutron absorber, in Ignitron rectifiers, in alloys, usually to harden other metals.
DefinitionNonmetallic element of atomic number 5; group IIIA of the periodic table. Aw 10.81. Valence 3. Two stable isotopes: 11 (approximately 81%) and 10 (approximately 19%).
HazardVery toxic; industrial poison; causes depression of the circulation; persistent vomiting; diarrhea; shock and coma.
Health HazardBoron has been studied extensively for its nutritional importance in animals and humans. There is a growing body of evidence that boron may be an essential element in animals and humans. Many nutritionists believe that people would benefi t from more boron and many popular multivitamins, such as centrum, in the diet. The adverse health effects of boron on humans is limited. However, ingestion/inhalation causes irritation to the mucous membrane and boron poisoning. Short-term exposures to boron in work areas are known to cause irritation of the eye, the upper respiratory tract, and the naso-pharynx, but the irritation disappears with the stoppage of further exposure. Ingestion of large amounts of boron (about 30 g of boric acid)over short periods of time is known to affect the stomach, intestines, liver, kidney, and brain and can eventually lead to death in exposed people.
Potential ExposureBoron is used in metallurgy as a degasifying agent and is alloyed with aluminum, iron, and steel to increase hardness. It is also a neutron absorber in nuclear reactors. Boron is frequently encountered in a variety of chemical formulations including boric acid, various borate salts, borax, and boron soil supplements.
First aidIf this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 minutes, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit.
ShippingBoron powder or dust: UN3178 Flammable solid, inorganic, Hazard Class: 4.1; Labels: 4.1—Flammable solid.
IncompatibilitiesBoron dust may form explosive mixture in air. Contact with strong oxidizers may cause explosions. Violent reaction (possible explosion) with concentrated nitric acid, hydrogen iodide; silver fluoride. Boron is incompatible with ammonia, bromine tetrafluoride, cesium carbide, chlorine, fluorine, interhalogens, iodic acid, lead dioxide, nitric acid, nitrosyl fluoride, nitrous oxide, potassium nitrite, rubidium carbide. Reacts exothermically with metals at high temperature above 900° C.
Waste DisposalDispose of contents and container to an approved waste disposal plant. All federal, state, and local environmental regulations must be observed.
PrecautionsElemental boron is non-toxic and common boron compounds, such as borates and boric acid, have low toxicity (approximately similar to table salt with the lethal dose being 2–3 g/kg) and do not require special precautions while handling. Some of the more exotic boron hydrogen compounds, however, are toxic as well as highly flammable and do require special care when handling
Tag:Boron(7440-42-8) Related Product Information
LITHIUM TETRA(2-METHYL-8-HYDROXYQUINOLINATO)BORON ALUMINUM BORON OXIDE(WHISKERS) BORON TRIFLUORIDE-PHOSPHORIC ACID LITHIUM TETRA(8-HYDROXYQUINOLINATO)BORON BORON TRIFLUORIDE-TETRAHYDROFURAN BORON TRIMETHOXIDE PHOSPHORIC ACID-BORON TRIFLUORIDE COMPLEX,BORON TRIFLUORIDE PHOSPHORIC ACID COMPLEX BOROVER(R) 3 BORON REAGENT TRICYCLOHEXYL BORON TRIALLYL BORON Sodium tetrafluoroborate 1-Butaneboronic acid Phenylboronic acid 4-Bromophenylboronic acid 3-Nitrophenylboronic acid BORON TRIS(TRIFLUOROACETATE) Boron Sodium borohydride