The color of dithionite, specifically referring to its most common and stable form, sodium dithionite, is typically described as varying depending on its physical state.
What is the Color of Dithionite?
Sodium dithionite can appear as a white to grayish crystalline powder or as light-lemon colored flakes. This variance in appearance often depends on the specific form of the compound (e.g., anhydrous or dihydrate) and its preparation.
Understanding Dithionite's Appearance
The appearance of sodium dithionite is a key characteristic for identification. When encountered as a fine powder, it generally presents a white to grayish hue. In other preparations, it can form flakes that exhibit a distinct light-lemon color. This dual description reflects the versatility of its physical forms and can be important for industrial and laboratory applications.
Key Physical Properties of Sodium Dithionite
Beyond its color, sodium dithionite possesses several other notable physical properties that are crucial for its handling and use. Here’s a quick overview:
| Property | Description |
|---|---|
| Appearance | White to grayish crystalline powder, or light-lemon colored flakes |
| Odor | Faint sulfur odor |
| Density | 2.38 g/cm³ (anhydrous) |
| 1.58 g/cm³ (dihydrate) | |
| Melting Point | 52 °C (126 °F; 325 K) |
These properties collectively define sodium dithionite, a powerful reducing agent widely used in various chemical processes, including dyeing, textile industries, and water treatment.
