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| CAS No.: | 1303-00-0 |
|---|---|
| Name: | GALLIUM ARSENIDE |
| Molecular Structure: | |
|
|
|
| Formula: | GaAs |
| Molecular Weight: | 144.645 |
| Synonyms: | Galliumarsenide;Gallium monoarsenide;Gallium monoarsenide (GaAs); |
| EINECS: | 215-114-8 |
| Density: | 5.316 g/cm3 |
| Melting Point: | 1238 °C |
| Solubility: | < 0.1 g/100 mL (20 °C) in water |
| Appearance: | Gray cubic crystals |
| Hazard Symbols: |
 T;  N
|
| Risk Codes: | 23/25-50/53 |
| Safety: | 20/21-28-45-60-61 |
| Transport Information: | UN 1557 |
| PSA: | 0.00000 |
| LogP: | -0.31160 |
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Consensus Reports
Reported in EPA TSCA Inventory. Arsenic and its compounds are on the Community Right-To-Know List.
Standards and Recommendations
OSHA PEL: OSHA: Cancer Hazard
ACGIH TLV: TWA 0.01 mg(As)/m3; Human Carcinogen; BEI: 35 µ (As)/L inorganic arsenic and methylated metabolites in urine
NIOSH REL: (Gallium Arsenide) CL 0.002 mg(As)/m3/15M
Specification
The Gallium arsenide, with the CAS registry number 1303-00-0 and EINECS registry number 215-114-8, has the systematic name and IUPAC name of arsanylidynegallium. And the molecular formula of this chemical is GaAs. It is kind of gray cubic crystals, and belongs to the following product categories: Inorganics; Electronic Materials; Materials Science; Micro/Nanoelectronics; Arsenides; Ceramics; Metal and Ceramic Science.
The physical properties of Gallium arsenide are as following: (1)ACD/LogP: 2.32; (2)# of Rule of 5 Violations: 0; (3)#H bond acceptors: 2; (4)#H bond donors: 1; (5)#Freely Rotating Bonds: 0; (6)Polar Surface Area: 28.72 Å2; (7)Index of Refraction: 1.674; (8)Molar Refractivity: 42.8 cm3; (9)Molar Volume: 113.9 cm3; (10)Polarizability: 16.96×10-24cm3; (11)Surface Tension: 61.5 dyne/cm; (12)Density: 1.24 g/cm3; (13)Flash Point: 121.9 °C; (14)Enthalpy of Vaporization: 59.46 kJ/mol; (15)Boiling Point: 350 °C at 760 mmHg; (16)Vapour Pressure: 4.51E-05 mmHg at 25°C.
Preparation of Gallium arsenide: It can be prepared by direct reaction from the elements which is used in a number of industrial processes. For example, VPE reaction of gaseous gallium metal and arsenic trichloride:
2 Ga + 2 AsCl3 → 2 GaAs + 3 Cl2
Uses of Gallium arsenide: It can be used to produce light emission devices(LCD), LD, FRT, HEMT, HTB, MMIC, MIMIC, HSIC and solar cells and detectors.
You should be cautious while dealing with this chemical. It is toxic by inhalation and in contact with skin. It is also very toxic to aquatic organisms, and may cause long-term adverse effects in the aquatic environment. Therefore, you had better take the following instructions: When using, do not eat, drink or smoke; After contact with skin, wash immediately with plenty of ... (to be specified by the manufacturer); In case of accident or if you feel unwell, seek medical advice immediately (show label where possible); This material and/or its container must be disposed of as hazardous waste; Avoid release to the environment. Refer to special instructions safety data sheet.
You can still convert the following datas into molecular structure:
(1)SMILES: [As]#[Ga]
(2)InChI: InChI=1/As.Ga/rAsGa/c1-2
(3)InChIKey: JBRZTFJDHDCESZ-WMDPQSSYAY
The toxicity data is as follows:
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| mouse | LD50 | intraperitoneal | 4700mg/kg (4700mg/kg) | PERIPHERAL NERVE AND SENSATION: FLACCID PARALYSIS WITHOUT ANESTHESIA (USUALLY NEUROMUSCULAR BLOCKAGE) BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) BEHAVIORAL: FOOD INTAKE (ANIMAL) | Gigiena i Sanitariya. For English translation, see HYSAAV. Vol. 45(10), Pg. 13, 1980. |
| rat | LD30 | intraperitoneal | 10gm/kg (10000mg/kg) | BEHAVIORAL: EXCITEMENT BEHAVIORAL: ATAXIA LUNGS, THORAX, OR RESPIRATION: RESPIRATORY STIMULATION | Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol. 24(3), Pg. 45, 1980. |