Yellow Mercury (II) Oxide CAS#21908-53-2
Appearance: Yellow to light orange, odorless crystalline powder.
Odor: Odorless.
Solubility: Insoluble in water and ethanol; soluble in dilute hydrochloric acid, nitric acid, and hot sodium chloride solution.
Stability: Stable under ordinary conditions. Decomposes upon heating above 500 °C into metallic mercury and oxygen. Light-sensitive.
Product Details
Key Properties
| Property | Value |
|---|---|
| Molar Mass | 216.59 g/mol |
| Melting Point | Decomposes at 500 °C |
| Density | 11.14 g/cm³ |
| Solubility | Insoluble in water; soluble in acids |
| Form | Crystalline powder |
| Color | Yellow to light orange |
| pH | N/A (insoluble) |
| Sensitivity | Light-sensitive |
| Storage | Sealed, cool, dry, dark place |
Safety & Hazard Information (EXTREMELY TOXIC)
| Item | Details |
|---|---|
| Hazard Class | 6.1 (Toxic) |
| UN Number | UN 1641 |
| Risk Statements | R26/27/28 (Very toxic by inhalation, skin contact, ingestion)R33 (Danger of cumulative effects)R50/53 (Very toxic to aquatic life) |
| Safety Statements | S13 (Keep away from food)S28 (After skin contact, wash immediately)S45 (In case of accident, seek medical advice)S60 (Dispose of contents/container as hazardous waste) |
| Target Organs | Kidneys, respiratory system, central nervous system. Cumulative poison. |
Pharmaceutical Manufacturing: Historically used in topical antiseptic and ophthalmic ointments.
Laboratory Reagent: For analytical chemistry and preparation of other mercury compounds.
Catalyst: In organic synthesis reactions.
Battery Industry: Component in some specialized batteries.
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