Calcium hydroxide , AR,95% , 1305-62-0
Synonym(s):
Calcium dihydroxide;Calcium hydroxide;Carboxide
CAS NO.：1305-62-0
Empirical Formula: CaH2O2
Molecular Weight: 74.09
MDL number: MFCD00010901
EINECS: 215-137-3
| Pack Size | Price | Stock | Quantity |
| 500G | RMB39.20 | In Stock |
|
| 2.5KG | RMB118.40 | In Stock |
|
| 12×500g | RMB375.20 | In Stock |
|
| others | Enquire |
PRODUCT Properties
| Melting point: | 580 °C |
| Boiling point: | 2850 °C |
| Density | 2.24 g/mL at 25 °C (lit.) |
| storage temp. | Store at +5°C to +30°C. |
| solubility | 1.7g/l |
| form | Solid |
| pka | 12.6[at 20 ℃] |
| color | White |
| PH | 11.27(1 mM solution);12.2(10 mM solution);12.46(100 mM solution); |
| Odor | Odorless |
| PH Range | 12.4 |
| Water Solubility | 1.65 g/L (20 ºC) |
| Sensitive | Air Sensitive |
| Merck | 14,1673 |
| Solubility Product Constant (Ksp) | pKsp: 5.26 |
| Exposure limits | ACGIH: TWA 5 mg/m3 OSHA: TWA 15 mg/m3; TWA 5 mg/m3 NIOSH: TWA 5 mg/m3 |
| Stability: | Stable. Incompatible with strong acids. |
Description and Uses
Calcium Hydroxide is a colorless crystal or white powder, obtained when CaO (called lime or quicklime) is mixed, or “slaked” with water. It can also be precipitated by mixing CaCl2 andNaOH.The nameof the natural,mineral formis “portlandite”. It is a relatively rare mineral, known from some volcanic, plutonic, and metamorphic rocks. It has also been known to be formed in burning coal dumps.
Calcium Hydroxide is a general food additive made by adding water to calcium oxide (lime). it has poor water solubility with a solubility of 0.185 g in 100 g of water at 0°c. the ph of a water solution at 25°c is approximately 12.4. it is used to promote dispersion of ingre- dients in sauces, creamed spinach, and a frozen pea/potato dish. it is used at 0.1% to stabilize the potassium iodide of iodized salt, and it is used as a neutralizer for soured cream prior to buttermaking. it is also termed hydrated lime, calcium hydrate, and slaked lime.
Safety
| Symbol(GHS) |   GHS05,GHS07 |
| Signal word | Danger |
| Hazard statements | H315-H318-H335 |
| Precautionary statements | P261-P264-P271-P280-P302+P352-P305+P351+P338 |
| Hazard Codes | Xi,C |
| Risk Statements | 41-34-37/38 |
| Safety Statements | 26-39-45-36/37/39-27 |
| RIDADR | 3262 |
| OEB | B |
| OEL | TWA: 5 mg/m3 |
| WGK Germany | 1 |
| RTECS | EW2800000 |
| F | 34 |
| TSCA | Yes |
| HS Code | 2825 90 19 |
| HazardClass | 8 |
| PackingGroup | III |
| Toxicity | LD50 orally in rats: 7.34 g/kg (Smyth) |
