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Beryllium Oxide

HCID 14775
NotesReactions
Basic informationOverviewNames & identifiersPropertiesSafety & regulationChemistry & industryRelated reactionsCompound notes
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Basic information

CAS
1304-56-9
Standard SMILES
[Be]=[O]
InChIKey
RYDWWBDDPXECNP-UHFFFAOYSA-N
Molecular formula
BeO
Average molar mass
25.012 g/mol
Monoisotopic mass
25.0070977

Overview

Beryllium oxide is an odorless white solid. Sinks in water. (USCG, 1999)

Names & identifiers

Preferred name
Beryllium Oxide
IUPAC
oxoberyllium
English name
Beryllium oxide hydrate
Molecular formula
BeH2O2
Molecular weight
43.03

Names & synonyms

BERYLLIUM OXIDE1304-56-9oxoberylliumBerylliaBromelleteThermaloxBeryllium monoxideNatural bromelliteThermalox 995Beryllium oxide (BeO)2S8NLR37S3CHEBI:62842
Show more names
Beryllium oxide hydrate
BROMELITERefChem:119116DTXCID101841830215-133-1680-425-1DTXSID30872818CCRIS 83HSDB 1607

Database identifiers

CAS
1304-56-9、21883-51-2
PubChem CID
14775
ChEBI
CHEBI:62842
EC Number
215-133-1、680-425-1
Nikkaji
J43.705K

Properties

Computed structural properties

Topological polar surface area
17.1 Ų
Hydrogen bond donors
0
Hydrogen bond acceptors
1
Rotatable bonds
0
Heavy atoms
2
Formal charge
0
Complexity
2

Experimental & physicochemical properties

Chemical Classes · 2 items

Metals -> Beryllium Compounds, Inorganic

Carcinogens

OdorOdorless
Density · 4 items

3 at 68 °F (USCG, 1999) - Denser than water; will sink

3.01 g/cu cm

3.0 g/cm³

3.01 @25 °C

Color/Form · 3 items

White hexagonal crystals

Light, amorphous powder

White, amorphous powder or white hexagonal crystals

Solubility · 4 items

Insoluble in water; slightly soluble in acid and alkali solutions

2 ug/100 mL in water at 30 °C; soluble in concentrated sulfuric acid, fused potassium hydroxide

Slowly soluble in concentrated acids or fixed alkali hydroxides

Solubility in water: insoluble

Boiling Point · 2 items

3787 °C

3787 °C

Melting Point · 3 items

2578 °C

2530 °C

2578 °C

Refractive Index

Safety & regulation

Safety information is for reference only and does not replace the supplier’s Safety Data Sheet (SDS), applicable regulations, or professional assessment.

GHS classification

GHS Classification · 6 items

Danger

H301: Toxic if swallowed [Danger Acute toxicity, oral]

P203, P260, P261, P264, P264+P265, P270, P271, P272, P280, P284, P301+P316, P302+P352, P304+P340, P305+P351+P338, P316, P318, P319, P320, P321, P330, P332+P317, P333+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)

Danger

H301 (98%): Toxic if swallowed [Danger Acute toxicity, oral]

P203, P260, P261, P264, P264+P265, P270, P271, P272, P280, P284, P301+P316, P302+P352, P304+P340, P305+P351+P338, P316, P318, P319, P320, P321, P330, P332+P317, P333+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)

Hazard information

Regulatory Information · 6 items

Chemical: Beryllium oxide (BeO)

Hazard Traits - Carcinogenicity

Beryllium oxide (BeO) is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Beryllium oxide (BeO) are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)

REACH registered substance: Beryllium oxide (EC: 215-133-1)

Beryllium oxide: HSNO Approval: HSR004367 Approved with controls

The New Jersey Worker and Community Right to Know Act requires public and private employers to provide information about hazardous substances at their workplaces. (N.J.S.A. 34:5A-1 et. seq.)

Other Safety InformationIMAP assessments - Beryllium metal and Beryllium oxide: Human health tier II assessment
DOT LabelPoison
Fire Hazards · 2 items

Special Hazards of Combustion Products: Toxic beryllium oxide fume may form in fire. (USCG, 1999)

Chemistry & industry

Pharmacology

Biological Half-LifeAlveolar retention half-life for beryllium oxide was approx 6 mo.
Metabolism/Metabolites · 1 item

Beryllium is absorbed mainly through the lungs, where it enters the bloodstream and is transported throughout the body by binding to prealbumins and gamma-globulins. Beryllium accumulates in lung tissue and the skeleton. It is excreted mainly in the urine. (L25)

Absorption, Distribution and Excretion · 5 items

...2 Persons who had ... constant exposure to beryllium oxide for 5 years showed appreciable excretion after 6 years' removal from contact ... no evidence of pulmonary involvement.

... Distribution of beryllium oxide ... varies with the method of its prepn: after intratracheal instillation of beryllium oxide prepd by calcining alpha-BE(OH)2 for 10 hr @ 500 °C was found in high concn in liver, kidneys & bones of rats, whereas prepn by calcining alpha-BE(OH)2 for 10 hr @ 1600 °C ... remained mainly in the lung.

... Rabbits given beryllium oxide ... IV a year or more before being killed or dying from osteosarcoma. Relatively high amt of the metal were found in the reticulo endothelial cells of liver & spleen. The lung also contained high concn. The levels in bone, kidney & heart were much lower.

... The skeletal deposition of beryllium from the ... low fired oxide, inhaled for 40 to 100 days by dogs, showed ... 0.6% ... of that retained in the lung ... 0.6% ... in the liver; and ... 397% ... in the pulmonary lymph nodes.

For more Absorption, Distribution and Excretion (Complete) data for BERYLLIUM OXIDE (9 total), please visit the HSDB record page.

Uses & manufacturing

Uses · 6 items

Used in electric heat sinks, electrical insulators, microwave oven components, gyroscopes, military vehicle armor, rocket nozzles, crucibles, thermocouple tubing, laser structural components, electron tubes, resistor cores, windows in klystron tubes, transistor mountings, high-temperature reactor systems, and beryllium oxide ceramics; Also used as an additive (glass, ceramics, and plastics) and as a catalyst for organic reactions; [HSDB] Used in fuels and moderators in nuclear reactors; [Merck Index] Used to make ceramics in resistor cores, laser tubes, and circuit chip carriers; [ACGIH]

Related reactions

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Compound notes

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On this pageBasic informationOverviewNames & identifiersPropertiesSafety & regulationChemistry & industryRelated reactionsCompound notes
Index of refraction: 1.719, 1.733
Physical Description · 4 items

Beryllium oxide is an odorless white solid. Sinks in water. (USCG, 1999)

Dry Powder

White solid; Insoluble in water; [Hawley] White odorless powder; [MSDSonline] Very sparingly soluble in water; [ACGIH]

WHITE CRYSTALS OR POWDER.

Stability/Shelf LifeStable under recommended storage conditions.
Other Experimental Properties · 5 items

After ignition it is almost insoluble in water, concentrated acids or solutions of fixed alkali hydroxides

Mohs hardness: 9

Extremely stable ... its stability depends on its structure and is determined by the content of bound water. The higher the calcination temperature, the more inert the beryllium oxide.

Pure (100%) beryllium oxide insulates electrically like a ceramic, but conducts heat like a metal.

For more Other Experimental Properties (Complete) data for BERYLLIUM OXIDE (10 total), please visit the HSDB record page.

Physicochemical properties

Flash point
None
Risk Statements
26 · 26/27-37
Safety Statements
26 · 26-45
RIDADR
1566 · 1566
HazardClass
6.1 · 6.1
PackingGroup
II

Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.

Fire PotentialNOT FLAMMABLE
Health Hazards · 1 item

Any dramatic, unexplained weight loss should be considered as possible first indication of beryllium disease. Other symptoms include anorexia, fatigue, weakness, malaise. Inhalation causes pneumonitis, nasopharyngitis, tracheobronchitis, dyspnea, chronic cough. Contact with dust causes conjunctival inflammation of eyes and irritation of skin. (USCG, 1999)

Hazards Summary · 2 items

May cause burns to skin and eyes; [HSDB] A severe skin, eye, and respiratory tract irritant; May cause beryllium sensitization after prolonged contact; Dust or fume inhalation may cause chemical pneumonitis; Repeated or prolonged exposure may cause chronic beryllium disease; [ICSC] See Beryllium for one additional linked occupational disease.

The major hazards encountered in the use and handling of beryllium oxide stem from its toxicologic properties. Toxic primarily by inhalation and dermal contact, exposure to this odorless, white, crystalline substance may occur from the processing (machining, molding, grinding, cutting, and fabrication) of beryllium oxide-containing glass and ceramics used in the manufacture of electronic equipment, aerospace equipment, and non-ferrous foundry products. Effects from exposure may include contact burns to the skin and eyes, skin ulceration, headache, weakness, chest pain, shortness of breath, pulmonary edema, and possibly death from heart failure. The OSHA PEL and ACGIH TLV are set at a TWA of 2 ug/cu m. Engineering control of process equipment (eg, enclosure and local exhaust ventilation) should be used to prevent inhalation and skin contact with beryllium oxide. In activities where over-exposure is possible, workers should wear a self-contained breathing apparatus. Protective clothing should also be worn, including protective suits, (preferably disposable, one-piece, and close-fitting at the ankles and wrists), goggles, gloves, hair covering, and overshoes. Work clothes should not be taken home for laundering. Beryllium oxide is not flammable. Shipping regulations and other DOT regulatory requirements should be consulted before transport. In cleaning spills of beryllium oxide, use a wet mop, or vacuum cleaner equipped with a high efficiency particulate filter. Do not dry sweep, dry mop, or use any such method that could disperse the dust. Before implementing land disposal of beryllium oxide waste, consult with environmental regulatory agencies for guidance.

Reactive GroupBases, Strong
EC ClassificationSymbol: T+; R: 49-25-26-36/37/38-43-48/23; S: 53-45; Note: E
UN ClassificationUN Hazard Class: 6.1; UN Pack Group: II
Reactivity AlertsWater-Reactive
OSHA Standards · 3 items

Permissible Exposure Limit: Table Z-2 8-hr Time Weighted Avg: 2 ug/cu m. /Beryllium and beryllium compounds/

Permissible Exposure Limit: Table Z-2 Acceptable Ceiling Concentration: 5 ug/cu m. /Beryllium and beryllium compounds/

Permissible Exposure Limit: Table Z-2 Acceptable maximum peak above the acceptable ceiling concentration for an 8-hour shift. Concentration: 25 ug/cu m. Maximum Duration: 30 minutes. /Beryllium and beryllium compounds/

Safety & protection

Fire Fighting · 2 items

Excerpt from ERG Guide 154 [Substances - Toxic and/or Corrosive (Non-Combustible)]:

Use fine water spray. In case of fire in the surroundings, use appropriate extinguishing media.

First Aid Measures · 4 items

Fresh air, rest. Half-upright position. Refer for medical attention.

Remove contaminated clothes. Rinse skin with plenty of water or shower. Wear protective gloves when administering first aid.

First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.

Rinse mouth. Refer for medical attention .

First AidINHALATION: take chest x-ray immediately to check for pneumonitis.
Safe StorageProvision to contain effluent from fire extinguishing. Separated from food and feedstuffs. Well closed. Store only in original container. Store in an area without drain or sewer access.
Fire Fighting Procedures · 4 items

If material involved in fire: Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Use water in flooding quantities as fog. Use "alcohol" foam, dry chemical or carbon dioxide. /Beryllium compound, NOS/

Wear positive pressure self-contained breathing apparatus when fighting fires involving this material. /Beryllium compound, NOS/

Suitable extinguishing media: Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide.

Advice for firefighters: Wear self contained breathing apparatus for fire fighting if necessary.

Storage ConditionsKeep container tightly closed in a dry and well-ventilated place. Keep in a dry place.
Cleanup Methods · 2 items

Control of environmental exposure: Prevent further leakage or spillage if safe to do so. Do not let product enter drains.

Personal precautions, protective equipment and emergency procedures: Wear respiratory protection. Avoid dust formation. Avoid breathing vapours, mist or gas. Ensure adequate ventilation. Evacuate personnel to safe areas. Avoid breathing dust. Environmental precautions: Prevent further leakage or spillage if safe to do so. Do not let product enter drains. Methods and materials for containment and cleaning up: Pick up and arrange disposal without creating dust. Sweep up and shovel. Keep in suitable, closed containers for disposal.

Nonfire Spill ResponseExcerpt from ERG Guide 154 [Substances - Toxic and/or Corrosive (Non-Combustible)]:
Disposal Methods · 2 items

SRP: The most favorable course of action is to use an alternative chemical product with less inherent propensity for occupational harm/injury/toxicity or environmental contamination. Recycle any unused portion of the material for its approved use or return it to the manufacturer or supplier. Ultimate disposal of the chemical must consider: the material's impact on air quality; potential migration in soil or water; effects on animal and plant life; and conformance with environmental and public health regulations.

Product: Offer surplus and non-recyclable solutions to a licensed disposal company. Contact a licensed professional waste disposal service to dispose of this material. Dissolve or mix the material with a combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber. Contaminated packaging: Dispose of as unused product.

Spillage Disposal · 1 item

Personal protection: chemical protection suit including self-contained breathing apparatus. Do NOT let this chemical enter the environment. Sweep spilled substance into sealable containers. If appropriate, moisten first to prevent dusting. Carefully collect remainder. Then store and dispose of according to local regulations.

Preventive Measures · 5 items

Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Provide appropriate exhaust ventilation at places where dust is formed.

SRP: The scientific literature for the use of contact lenses by industrial workers is inconsistent. The benefits or detrimental effects of wearing contact lenses depend not only upon the substance, but also on factors including the form of the substance, characteristics and duration of the exposure, the uses of other eye protection equipment, and the hygiene of the lenses. However, there may be individual substances whose irritating or corrosive properties are such that the wearing of contact lenses would be harmful to the eye. In those specific cases, contact lenses should not be worn. In any event, the usual eye protection equipment should be worn even when contact lenses are in place.

Gloves must be inspected prior to use. Use proper glove removal technique (without touching glove's outer surface) to avoid skin contact with this product. Dispose of contaminated gloves after use in accordance with applicable laws and good laboratory practices. Wash and dry hands.

If material not involved in fire: Keep material out of water sources and sewers. /Beryllium compound, NOS/

For more Preventive Measures (Complete) data for BERYLLIUM OXIDE (8 total), please visit the HSDB record page.

Isolation and EvacuationExcerpt from ERG Guide 154 [Substances - Toxic and/or Corrosive (Non-Combustible)]:

Toxicology

TreatmentChronic beryllium disease is treated with immunosuppressive medicines, usually of the glucocorticoid class. (L24)
Interactions · 1 item

Guinea pigs sensitized by 12 biweekly intradermal injections of 10 ug beryllium sulfate reacted with delayed hypersensitivity to max subtoxic skin test doses of 5 ug beryllium oxide, with persistent granulomata and sensitivity proportional to solubility of salt.

Health Effects · 1 item

Acute inhalation of a high level of beryllium can result in a pneumonia-like condition called acute beryllium disease. Chronic inhalation of beryllium can cause an inflammatory reaction in the respiratory system called chronic beryllium disease. Chronic beryllium disease may result in anorexia and weight loss, as well as right side heart enlargement and heart disease in advanced cases. Chronic exposure can also increase the risk of lung cancer. Skin contact with beryllium results in contact dermatitus. (L24, L25)

Ecotoxicity Values · 5 items

LC50; Species: Pimephales promelas (fathead minnow); Conditions: static; Concentration: 150 ug/L for 96 hr, soft water; 20,000 ug/L for 96 hr, hard water /Beryllium ion/

LC50; Species: Lepomis macrochirus (bluegill); Conditions: static; Concentration: 1,300 ug/L for 96 hr, softwater; 12,000 ug/L for 96 hr, hardwater /Beryllium ion/

EC50; Species: Cladoceran (daphnia magna); Concentration: 2,500 ug/L for 48 hr; Effect: reproduction /Conditions of bioassay not specified in source examined/ /Beryllium ion/

LC50; Species: Carassius auratus (goldfish); Conditions: flow through, measured; Concentration: 4,800 ug/Be/L, time not specified /Beryllium ion/

For more Ecotoxicity Values (Complete) data for BERYLLIUM OXIDE (6 total), please visit the HSDB record page.

Environmental Fate · 1 item

AQUATIC FATE: In aqueous solution, beryllium exhibits only the +2 oxidation state(1). Soluble beryllium salts are hydrolyzed to form insoluble beryllium hydroxides(2). Under typical environmental conditions, the hydroxo-complex BeOH+ and Be2+, are expected to be the dominant dissolved species(1). Be(OH)2 is expected to precipitate from water given its low solubility at the pH range of most natural systems(1).

Adverse EffectsFibrogenic - Inducing tissue injury and fibrosis (scarring).
Exposure Routes · 2 items

The substance can be absorbed into the body in hazardous amounts by inhalation of its aerosol and by ingestion.

Inhalation (L24)

Toxicity Summary · 1 item

Once in the body, beryllium acts as a hapten and interacts with human leucocyte antigen (HLA) DP presenting cells in the lungs, becoming physically associated with a major histocompatability (MHC) class II molecule. This MHC class II-beryllium-peptide complex is recognized by the T lymphocyte receptor, triggering CD4+ T lymphocyte activation and proliferation. The resulting inflammatory response is a cell-mediated process orchestrated by cytokines and results in the formation of (usually pulmonary) granulomas. Beryllium's toxicity may be controlled by the iron-storage protein ferritin, which sequesters beryllium by binding it and preventing it from interacting with other enzymes. (L25, A37, A91)

Signs and Symptoms · 4 items

Cough. Laboured breathing. Shortness of breath. Sore throat. Symptoms may be delayed.

MAY BE ABSORBED!

Redness. Pain.

Chronic beryllium disease causes fatigue, weakness, difficulty breathing, and a persistent dry cough. (L24, L25)

ICSC Environmental DataThe substance may cause long-term effects in the aquatic environment.
Natural Pollution SourcesMineral: bromellite; composition: beryllium oxide; geological occurrence: veins; geological distribution: Sweden. /From table/
Human Toxicity Excerpts · 5 items

/SIGNS AND SYMPTOMS/ ... Acute illness ... in beryllium industry ... reported ... /during/ ... processing of beryl ore for prodn of beryllium oxide. Thirty-eight cases with five deaths ... reported. Symptoms include cough, dyspnea, substernal pain, anorexia, increasing fatigue, & weight loss.

/SIGNS AND SYMPTOMS/ A chronic pulmonary condition known as 'berylliosis' ... is frequently fatal ... pulmonary x-rays demonstrated a miliary mottling, & interstitial granulomatosis was diagnosed ... caused by beryllium cmpd of low solubility, particularly the low fired oxide. No established dose response relationship ...

/CASE REPORTS/ Two cases of human carcinomas by beryllium aerosols were reported. In one case, an adult male had contact with the dust, vapors, and gases of beryllium oxide and beryllium chloride for about 3 years. 3 years after employment ceased, the worker had shadows in both pulmonary x-ray midfields. /14 years later/ autopsy confirmed the presence of carcinoma in the right pulmonary upper lobe, with metastases ...

/CASE REPORTS/ ... Persons who had ... constant exposure to beryllium oxide for 5 years showed appreciable excretion after 6 years' removal from contact ... no evidence of pulmonary involvement.

For more Human Toxicity Excerpts (Complete) data for BERYLLIUM OXIDE (6 total), please visit the HSDB record page.

Regulatory information

Atmospheric Standards · 1 item

Listed as a hazardous air pollutant (HAP) generally known or suspected to cause serious health problems. The Clean Air Act, as amended in 1990, directs EPA to set standards requiring major sources to sharply reduce routine emissions of toxic pollutants. EPA is required to establish and phase in specific performance based standards for all air emission sources that emit one or more of the listed pollutants. Beryllium compounds are included on this list. /Beryllium Compounds/

Clean Water Act RequirementsToxic pollutant designated pursuant to section 307(a)(1) of the Federal Water Pollution Control Act and is subject to effluent limitations. /Beryllium and compounds/
Federal Drinking Water StandardsMaximum contaminant level for inorganic contaminants: Contaminant: Beryllium; MCL 0.004 mg/L. /Beryllium/
Federal Drinking Water GuidelinesMaximum contaminant level goal for inorganic contaminants: Contaminant: Beryllium; MCLG 0.004 mg/L. /Beryllium/

Safety data

ridadr
1566
risk_code
26/27-37
safety_code
26-45
hazard_class
6.1
packing_group
II

Glass Manufacturing [Category: Industry]

Beryllium oxide is used in high technology ceramics, electronic heat sinks, electrical insulators, microwave oven components, gyroscopes, military vehicle armor, rocket nozzles crucibles, thermocouple tubing, laser structural components, substrates for high-density electrical circuits, automotive ignition systems, and radar electronic countermeasure systems.

Electron tubes, resistor cores; windows in klystron tubes; transistor mountings; high-temperature reactor systems; additive to glass, ceramics and plastics; preparation of beryllium compounds; catalyst for organic reactions.

Transparency to microwaves has led to its use as windows, radomes and antennae in microwave devices; it is also used in high-power laser tubes.

Beryllium oxide is an electrical insulator and is used in rocket engines, catalysts, semiconductors, moderators of atomic reactors, and neutron reflectors. (L28)

Impurities · 1 item

Beryllium oxide-purities: 99-99.99% ... The purity of beryllia is critical to its thermal conductivity: as the purity drops below 99.5%, thermal conductivity drops off rapidly. Impurities (mg/kg): Al, 46; Fe, 32; Cr, 8; Mn, < 2; Ni, 9; B, 2; Ca, 31; Co, < 1; Cu, 3; Si, 1861; Mg, 922; Li, 2; Zn, < 20; Ti, 5; Na, 173; Ag, < 1; Mo, < 3; Pb, 2. Silicon and magnesium silicates are added to beryllia powder as sintering aids.

U.S. Production · 3 items

2023: 50,000 - <250,000 lb

Production volume for non-confidential chemicals reported under the 2006 Inventory Update Rule. Chemical: Beryllium oxide. Aggregated National Production Volume: < 500,000 pounds.

Non-confidential 2012 Chemical Data Reporting (CDR) information on the production and use of chemicals manufactured or imported into the United States. Chemical: Beryllium oxide. National Production Volume: Withheld.

Consumer UsesOther
Industry UsesOther
Methods of Manufacturing · 5 items

Beryllium oxide is produced by the following processes: beryllium hydroxide is first converted to high-purity beryllium sulfate tetrahydrate, as described above. This salt is calcined at carefully controlled temperatures, between 1150 and 1450 °C, selected to give the properties of the beryllium oxide powders required by individual beryllia ceramic fabricators. Alternatively, beryllium hydroxide may be purified first and then calcined directly to beryllium oxide powder.

... Produced by dissolving technical-grade beryllium hydroxide in sulfuric acid, precipitating out hydrated beryllium sulfate, which is then calcined at 1,150-1,450 °C.

By heating of beryllium nitrate or hydroxide.

... Obtained directly from beryllium hydroxide by calcination or from the basic carbonate, acetate, or sulfate by ignition. The white, reactive powders differ in grain size, morphology, and impurity content.

In the primary industrial process, beryllium hydroxide extracted from ore is dissolved in sulfuric acid. The solution is filtered and the filtrate is concentrated by evaporation and unpon cooling high purity beryllium sulfate, BeSO4.4H2O crystallizes. The salt is calcined at carefully controlled temperatures between 1150 and 1450 °C, selected to give tailored properties of the beryllium oxide powders.

Formulations/Preparations · 2 items

Beryllium oxide-purities: 99-99.99%

Grade: Technical, CP, pure, single crystals.

General Manufacturing Information · 6 items

Miscellaneous Manufacturing

Beryllium oxide (BeO): ACTIVE

Today, practically all of the beryllium oxide produced commercially is calcined at temperatures of 1000 °C or higher and is referred to as 'high-fired'. Beryllium oxide that is calcined at temperatures lower than 1000 °C is referred to as 'low-fired'; it consists of poorly crystallized, small particles which are more reactive and more soluble in dilute acid than those of high-fired beryllium oxide

... Its property of being sinterized at 1,400 °C makes it suitable for manufacture of ceramic materials, since it can be either molded or applied as a coating to a metal or other base; sintering then produces a hard coherent mass with a smooth glassy surface.

The higher the calcination temperature the more inert the beryllium oxide.

Beryllium oxide ceramics have the highest thermal conductivity of the oxide ceramics.

Suppliers4 total

上海迈瑞尔生化科技有限公司4006356688 18621169109 · [email protected]
安耐吉化学&3A（安徽泽升科技股份有限公司）400-0056266 · [email protected]
XIAMEN AMITY INDUSTRY AND TRADE CO., LTD.+8618950047208 · [email protected]
DAYANG CHEM (HANGZHOU) CO.,LTD+86-88938639 +86-17705817739 · [email protected]
Additional notes · 1 item

DefinitionChEBI: Beryllium oxide is a beryllium molecular entity consisting of beryllium (+2 oxidation state) and oxide in the ratio 1:1. In the solid state, BeO adopts the hexagonal wurtzite structure form while in the vapour phase, it is present as discrete diatomic covalent molecules. It has a role as a carcinogenic agent. It is a beryllium molecular entity and a metal oxide.