Arsenic trisulfide
| Arsenic trisulfide | |
|---|---|
| Arsenic-trisulfide-3D-balls.png | |
| Ball-and-stick model of arsenic trisulfide | |
| Identifiers | |
| CAS Number | |
| PubChem CID | |
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| UNII | |
| ChEBI | |
| ChEMBL | |
| Properties | |
| Chemical Formula | As2S3 |
| Molar Mass | 246.04 g/mol |
| Appearance | Yellow solid |
| Density | 3.49 g/cm3 |
| Melting Point | 310 °C |
| Boiling Point | 707 °C |
| Hazards | |
| GHS Pictograms | [[File:|50px]] |
| GHS Signal Word | |
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| NFPA 704 | [[File:|50px]] |
| References | |
Arsenic trisulfide is a chemical compound with the formula As2S3. It is a yellow solid that occurs naturally as the mineral orpiment. Arsenic trisulfide is known for its use in the production of pigments, as well as its historical use in medicine and art.
Structure and Properties
Arsenic trisulfide is composed of arsenic and sulfur atoms. The compound forms a layered structure, with each arsenic atom bonded to three sulfur atoms. This gives the compound its characteristic yellow color and crystalline form. It is insoluble in water but can dissolve in alkaline solutions.
Occurrence
Arsenic trisulfide occurs naturally as the mineral orpiment, which is found in hydrothermal veins, hot springs, and volcanic fumaroles. Orpiment has been used historically as a pigment due to its bright yellow color.
Uses
Arsenic trisulfide has several applications:
- Pigments: Historically, it was used as a pigment known as "king's yellow" in paintings and manuscripts.
- Medicine: In traditional Chinese medicine, arsenic trisulfide has been used for its purported therapeutic properties.
- Semiconductors: It is used in the production of certain types of semiconductors and photoconductors.
Safety and Toxicity
Arsenic trisulfide is toxic if ingested or inhaled. It can cause arsenic poisoning, which is characterized by symptoms such as abdominal pain, vomiting, and diarrhea. Long-term exposure can lead to more severe health effects, including cancer. Proper handling and safety precautions are essential when working with this compound.
Also see
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