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Gallium sesquioxide

Gallium sesquioxide structure

CAS No:
12024-21-4
Formula:
Ga2O3
Chemical Name:
Gallium sesquioxide
Synonyms:
Gallium oxide (Ga2O3);Digallium trioxide;Gallium sesquioxide;Gallium trioxide;Gallium(3+) oxide;Gallia;Gallium oxide (2:3);Gallium oxide;Gallium oxide (GaO1.5);1246736-65-1;2183486-54-4;2425661-31-8
Categories:
Organic Chemistry > Organometallic Compounds

Description

white odourless powderOdorless fine white powder. Insoluble in water.White crystals; exists in three crystalline modifications: alpha-, beta-, and gamma-Ga2O3; while the alpha-form is analogous to the corundum form of alumina, the beta-Ga2O3 is isomorphous with theta-alumina; alpha-form converts to beta-modification on calcination at high temperatures (600°C); gamma form is stable at low temperatures; density 6.44 g/cm3 (alpha-Ga2O3), 5.88 g/cm3 (betaGa2O3); melts at 1,725°C; soluble in most a

Gallium oxide is an odorless fine white powder. Insoluble in water. (NTP, 1992)

Gallium sesquioxide Basic Attributes

Molecular Weight：

187.44

Exact Mass：

187.85200

EC Number：

234-691-7

UNII：

46F059V66A

DSSTox ID：

DTXSID9031359

HScode：

28259090

Characteristics

PSA：

43.37000

XLogP3：

-0.84260

Appearance：

White Powder or Lump

Density：

6.44 g/mL at 25 °C

Melting Point：

1740 °C

Refractive Index：

1.92

Water Solubility：

soluble in acids.Insoluble in water

Toxicity：

Oral-mouse LD50: 10000 mg/kg; intraperitoneal-mouse LD50: 5000 mg/kg

Air and Water Reactions：

Insoluble in water.

Reactive Group：

Non-Redox-Active Inorganic Compounds

Reactivity Profile：

GALLIUM OXIDE may react with acids. Heating (to 1292° F) with magnesium causes a violent reduction to metallic slate. (NTP, 1992)

Safety Information

Transport codes：

NONH for all modes of transport

wgk germany：

safety instructions：

24/25

RTECS Number：

LW9650000

Storage features：

Warehouse ventilated, low temperature and dry

Stability/Shelf Life：

Stable. Incompatible with magnesium.

Fire Hazards：

Flash point data for this chemical are not available; however, it is probably combustible. (NTP, 1992)

GHS Classification：

Not Classified

Fire Fighting：

Fires involving this material can be controlled with a dry chemical, carbon ioxide or Halon extinguisher. (NTP, 1992)

Nonfire Spill Response：

SMALL SPILLS AND LEAKAGE: If you spill this chemical, you should dampen the solid spill material with water, then transfer the dampened material to a suitable container. Use absorbent paper dampened with water to pick up any remaining material. Seal your contaminated clothing and the absorbent paper in a vapor-tight plastic bag for eventual disposal. Wash all contaminated surfaces with a soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned. STORAGE PRECAUTIONS: You should store this chemical under refrigerated temperatures, and protect it from moisture. (NTP, 1992)

Personal Protective Equipment：

RECOMMENDED RESPIRATOR: Where the neat test chemical is weighed and diluted, wear a NIOSH-approved half face respirator equipped with an organic vapor/acid gas cartridge (specific for organic vapors, HCl, acid gas and SO2) with a dust/mist filter. (NTP, 1992)

Toxicity

Toxicity class：

practically nontoxic

Drug Information

Health Hazards：

SYMPTOMS: Symptoms of exposure to this compound include reduction of red blood cells and platelets, anemia, skin rash and nausea. (NTP, 1992)

First Aid：

EYES: First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop. SKIN: IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment. INHALATION: IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used; if not available, use a level of protection greater than or equal to that advised under Protective Clothing. INGESTION: Some heavy metals are VERY TOXIC POISONS, especially if their salts are very soluble in water (e.g., lead, chromium, mercury, bismuth, osmium, and arsenic). IMMEDIATELY call a hospital or poison control center and locate activated charcoal, egg whites, or milk in case the medical advisor recommends administering one of them. Also locate Ipecac syrup or a glass of salt water in case the medical advisor recommends inducing vomiting. Usually, this is NOT RECOMMENDED outside of a physician's care. If advice from a physician is not readily available and the victim is conscious and not convulsing, give the victim a glass of activated charcoal slurry in water or, if this is not available, a glass of milk, or beaten egg whites and IMMEDIATELY transport victim to a hospital. If the victim is convulsing or unconscious, do not give anything by mouth, assure that the victim's airway is open and lay the victim on his/her side with the head lower than the body. DO NOT INDUCE VOMITING. IMMEDIATELY transport the victim to a hospital. (NTP, 1992)

MeSH Entry Terms：

gallium oxide

Gallium sesquioxide Use and Manufacturing

Uses

In semiconductors; gas sensing; catalysis.Nanostructures as blue and UV light emitters in optoelectronic device applications.

Manufacturing Info：

Gallium oxide (Ga2O3): ACTIVE

Computed Properties

Molecular Weight:187.44
Hydrogen Bond Acceptor Count:3
Exact Mass:187.83502
Monoisotopic Mass:185.83589
Topological Polar Surface Area:3
Heavy Atom Count:5
Covalently-Bonded Unit Count:5
Compound Is Canonicalized:Yes

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