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Calcium hydroxide CAS#1305-62-0
CAS Number:1305-62-0
Chemical Formula: CaH2O2
Synonyms:
Calcium Hydroxide, Powder, Reagent
CALCIUMHYDROXIDE,TECHNICAL
CALCIUMHYDROXIDE,TECH(HYDRATEDLIM)(BULK
MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)
Appearance: White solid
Calcium hydroxide CAS#1305-62-0
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 Chemical Properties |
| Melting point | 580 °C |
| Boiling point | 2850 °C |
| bulk density | 400kg/m3 |
| density | 2.24 g/mL at 25 °C (lit.) |
| refractive index | 1.574 |
| storage temp. | Store at +5°C to +30°C. |
| solubility | 1.7g/l |
| form | Solid |
| pka | 12.6[at 20 ℃] |
| color | White |
| Odor | Odorless |
| PH | 11.27(1 mM solution);12.2(10 mM solution);12.46(100 mM solution); |
| 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. |
| Cosmetics Ingredients Functions | BUFFERING |
| CAS DataBase Reference | 1305-62-0(CAS DataBase Reference) |
| NIST Chemistry Reference | Calcium dihydroxide(1305-62-0) |
| EPA Substance Registry System | Calcium hydroxide (1305-62-0) |
| Safety Information |
| Hazard Codes | Xi,C |
| Risk Statements | 41-34-37/38 |
| Safety Statements | 26-39-45-36/37/39-27 |
| OEB | B |
| OEL | TWA: 5 mg/m3 |
| WGK Germany | 1 |
| RTECS | EW2800000 |
| F | 34 |
| TSCA | Yes |
| HS Code | 2825 90 19 |
| Hazardous Substances Data | 1305-62-0(Hazardous Substances Data) |
| Toxicity | LD50 orally in rats: 7.34 g/kg (Smyth) |
Product Application of Calcium hydroxide CAS#1305-62-0
GB 2760-96: processing aids, GMP.
FAO/WHO (1984): butter and whey cream, 2g/kg (only used for adjust Ph value, calculate on anhydrous substance); grape juice and its concentrated juices (physical method for anticorrosion) baby food, edible caseinate, according to GMP.
In Japan, the maximum amount is 1.84% (calcium 1%).
Calcium hydroxide Used for preparing bleaching powders, hard water softeners and the disinfecting and clarifying agents of tap water , as well as in building industry
2. Used for pharmacy. Used as rubber and oil industry additives. Used in lubricants for preventing coking, sludge deposition and anti-corrosion. Used as hard water softeners, disinfectants, antacids and so on.
3. Used as analytical reagents, carbon dioxide absorbents, as well as in organic synthesis
4. Used for making bleaching powder, hard water softener, depilatory, disinfectant, acid stop agent, astringent and various calcium salts.
5. Use for carbon dioxide examination and gas absorption. Used for leather hair removal, insecticide and water treatment.
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