CalciumSulfateDihydrate , withindicator,8mesh , 7778-18-9
Synonym(s):
desiccant;Drierite non-Indicating
CAS NO.：7778-18-9
Empirical Formula: Ca.O4S
Molecular Weight: 136.14
MDL number: MFCD00799067
EINECS: 231-900-3
| Pack Size | Price | Stock | Quantity |
| 5g | RMB719.20 | In Stock |
|
| 25g | RMB2159.20 | In Stock |
|
| others | Enquire |
PRODUCT Properties
| Melting point: | 1450 °C |
| Density | 2.960 |
| storage temp. | Store at RT. |
| solubility | 2g/l |
| form | Powder |
| Specific Gravity | 2.96 |
| color | White |
| Odor | wh. to sl. yel.-wh. powd. or crystals, odorless, tasteless |
| Water Solubility | Soluble in water. |
| Sensitive | Moisture Sensitive |
| Merck | 14,1706 |
| Exposure limits | ACGIH: TWA 10 mg/m3 OSHA: TWA 15 mg/m3; TWA 5 mg/m3 NIOSH: TWA 10 mg/m3; TWA 5 mg/m3 |
| Stability: | Stable. Incompatible with aluminium, strong acids. |
| LogP | -1.031 (est) |
Description and Uses
Calcium sulfate and its hydrates are important industrial compounds that have been used throughout history. Calcium sulfate is obtained naturally from mined gypsum rock, but it also exists in mineral form. Gypsum forms in beds as sedimentary rock when calcium sulfate, which is a natural component of seawater, is deposited as shallow marine water bodies evaporate. Gypsum is a transparent, soft, white mineral and is the most common sulfate mineral.
The largest use of calcium sulfate is in the construction industry, which accounts for more than 90% of its production.Gypsum has hundreds of other applications outside the construction industry. It can be used agriculturally for several purposes: to supply calcium and sulfur to soils, to balance pH, and to condition soil. Food grade calcium sulfate is used as a calcium supplement in enriched foods such as flour, cereals, and baked goods. It is used as a gelling and firming agent with canned vegetables. Calcium sulfate is the most common tofu coagulant. The positively charged calcium ion in calcium sulfate attracts the negatively charged groups in protein molecules, causing thermally denatured proteins to coagulate. Anhydrous calcium sulfate is used as a filler to whiten food and consumer products such as frostings, ice creams, paper, paints, and toothpaste. Powdered gypsum can be used as a chalk for marking athletic fields and other large areas.
Safety
| Symbol(GHS) |   GHS08,GHS09 |
| Signal word | Danger |
| Hazard statements | H317-H319-H334-H341-H350-H360F-H411 |
| Precautionary statements | P202-P273-P280-P302+P352-P305+P351+P338-P308+P313 |
| Hazard Codes | T,N,Xi |
| Risk Statements | 49-42/43-51/53-36/37-68-60-50/53 |
| Safety Statements | 53-22-36/37-45-60-24/25-36-26-61 |
| RIDADR | UN 3077 9/PG 3 |
| OEB | B |
| OEL | TWA: 10 mg/m3 (total) |
| WGK Germany | 1 |
| RTECS | WS6920000 |
| F | 3 |
| TSCA | Yes |
| HazardClass | 9 |
| HS Code | 28332980 |
