Aug 20 2013
Topics Covered
Description
Applications
Chemical Properties
Electrical Properties
Thermal, Mechanical and Optical Properties
Safety Information
Description
Arsenic trisulfide is an inorganic compound with the chemical formula As2S3. It occurs naturally in the minerals orpiment and realgar. It is a group V/VI, intrinsic p-type semiconductor that exhibits photo-induced phase-change properties. It can be synthesized from the elements arsenic and sulfur, through aqueous precipitation and by reactions with oxygen.
Applications
Arsenic trisulfide finds applications in the following areas:
-
Pigment
-
IR-transmitting glasses
-
Treatment of acute promyelocytic leukemia
-
Inorganic photoresists.
Chemical Properties
The chemical properties of arsenic trisulfide are provided in the table below:
|
Chemical Properties |
|
Chemical Formula |
As2S3 |
|
Molecular Weight |
246.04 |
|
CAS No. |
1303-33-9 |
|
Group |
Arsenic – 15
Sulfur - 16 |
|
Crystal Structure |
Monoclinic |
|
Lattice Constant |
a = 11.49 Å
b = 9.59 Å
c = 4.25 Å |
Electrical Properties
The electrical properties of arsenic trisulfide are provided in the table below:
|
Electrical Properties |
|
Magnetic Susceptibility |
-0.00007 |
Thermal, Mechanical and Optical Properties
The thermal, mechanical and optical properties of arsenic trisulfide are provided in the tables below:
|
Thermal Properties |
|
Heat of Formation |
-169 kJ/mol |
|
Standard molar entropy |
163.6 J/mol K |
|
Specific Heat Capacity |
116.3 J/mol K |
|
Mechanical Properties |
|
Density |
3.46 g/cm3 |
|
Melting Point |
310°C |
|
Boiling Point |
707°C |
|
Mohs Hardness |
1.8 |
|
Optical Properties |
|
Refractive Index |
2.40 |
Safety Information
|
Safety Information |
|
GHS Hazard Statements |
H301 - Toxic if swallowed
H331 - Toxic if inhaled
H410 - Very toxic to aquatic life with long lasting effects. |
|
Safety Precautions |
P261 - Avoid breathing dust/ fume/ gas/ mist/ vapors/ spray
P273 - Avoid release to the environment
P301 + P310 - If swallowed, immediately call a poison center or doctor/physician
P311 - Call a poison center or doctor/ physician
P501 - Dispose of contents/ container to an approved waste disposal plant. |