| Formula / Notation | Ca(OH)2 |
|---|---|
| CAS Number | 1305-62-0 |
| Molecular Weight | 74.09 |
| Melting Point | 1076 °F (Decomposes) (Loses H2O) (NIOSH, 2024) |
| Boiling Point | Decomposes (NIOSH, 2024) |
| Density | 2.24 at 68 °F (USCG, 1999) - Denser than water; will sink |
| Solubility | 0.2 % at 32 °F (NIOSH, 2024) |
| Appearance | Calcium hydroxide is an odorless white granules. Sinks in water. (USCG, 1999) |
| Also Known As | calcium dihydroxide; 1305-62-0; Slaked lime; Hydrated lime; Lime hydrate; Calcium hydrate; Lime water; Calcium hydroxide (Ca(OH)2); Hydralime; Slaked-lime |
| Category | Bases & Alkalis |
What is Calcium hydroxide?
Calcium hydroxide (Ca(OH)2) is a base or alkali that appears as Calcium hydroxide is an odorless white granules. Sinks in water. (USCG, 1999). It has a molecular weight of 74.09 g/mol. Its IUPAC name is calcium dihydroxide. Boiling point: Decomposes (NIOSH, 2024). Melting point: 1076 °F (Decomposes) (Loses H2O) (NIOSH, 2024).
Formula & Notation
IUPAC Name: calcium dihydroxide
Other Names / Synonyms: calcium dihydroxide; 1305-62-0; Slaked lime; Hydrated lime; Lime hydrate; Calcium hydrate; Lime water; Calcium hydroxide (Ca(OH)2); Hydralime; Slaked-lime
Properties & Characteristics
Physical Data
| Property | Value |
|---|---|
| Melting Point | 1076 °F (Decomposes) (Loses H2O) (NIOSH, 2024) |
| Boiling Point | Decomposes (NIOSH, 2024) |
| Density | 2.24 at 68 °F (USCG, 1999) - Denser than water; will sink |
| Molecular Weight | 74.09 |
| Solubility | 0.2 % at 32 °F (NIOSH, 2024) |
| Appearance | Calcium hydroxide is an odorless white granules. Sinks in water. (USCG, 1999) |
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Calcium hydroxide (Ca(OH)2) is a base or alkali that appears as Calcium hydroxide is an odorless white granules. Sinks in water. (USCG, 1999). It has a molecular weight of 74.09 g/mol. Its IUPAC name is calcium dihydroxide. Boiling point: Decomposes (NIOSH, 2024). Melting point: 1076 °F (Decomposes) (Loses H2O) (NIOSH, 2024).
Used in chemical manufacturing, pH adjustment, saponification, water treatment, and as a laboratory reagent.
Corrosive or irritant. Causes burns to skin and eyes. Store away from acids. Wear protective gloves and goggles. Consult SDS before use.
The formula or notation for Calcium hydroxide is: Ca(OH)2