Gypsum powder

详情

Specifications
 
CAS No.:9000-70-8
 
Other Names: Gypsum
 
MF:CASO4
 
EINECS No.:232-554-6
 
FEMA No.:3025
 
Place of Origin:Uzbekistan
 
Type:Stabilizers
 
Brand Name:Gypsum
 
Model Number:80010
 
Product name: Calcium sulfate
 
Color:White Powder
 
Grade:Food Grade
 
Usage:Stabilizers, thickeners, coagulators etc.
 
Standard:FCC, E516
 
Package:Paper bags
 
Outside package:pallet
 
HS CODE:283329
 
Packaging:  25kgs/bag
 
 
Packaging & Delivery
Packaging Details:
paper bags and pallets
 
Delivery Detail:
Shipped in 15 days after payment
 
We are one of the high spirited manufacturers and exporters of Plaster of Paris. Optimum quality Plaster of Paris is supplied by us. Our superior quality Plaster of Paris is highly demanded by all our clients. Accurate composition of compounds makes our Plaster of Paris simply unsurpassed. Our Plaster of Paris is widely used in making crafts, molds, casts, sculpture etc. We can perform bulk orders for Plaster of Paris, that too on most competitive rates.

Chemical Composition

Appearance : White Fine powder
Coarce particle on 100 mesh : Max 0.1 %
Purity as CaSO4 : Min. 92 %
MgO : 0.10%
Fe2O3 : 0.30%
Al2O3 : 0.70%
SiO : 0.95%

Applications : Plaster of Paris from the basis of many commercial, plasters used For interior decoration as a false ceiling, studio sets etc.

Plaster - white or grayish fine powder produced from gypsum (gypsum) by firing at a temperature of 140- 190 C; Rapid and fast setting cement.
 
APPLICATION

Plaster is used for plastering, gypsum concrete manufacturing gypsum building products, castings, shapes, and as an additive to other binders (e.g., lime, cements).
 
Gypsum plaster, or plaster of Paris, is produced by heating gypsum to about 300 °F (150 °C):
CaSO4·2H2O + heat → CaSO4·0.5H2O + 1.5H2O (released as steam)
 
When the dry plaster powder is mixed with water, it re-forms into gypsum. The setting of unmodified plaster starts about 10 minutes after mixing and is complete in about 45 minutes; but not fully set for 72 hours. If plaster or gypsum is heated above 266 °F (130 °C), hemihydrate is formed, which will also re-form as gypsum if mixed with water.

On heating to 180 °C, the nearly water-free form, calledγ-anhydrite (CaSO4·nH2O where n = 0 to 0.05) is produced.γ-Anhydrite reacts slowly with water to return to the dihydrate state, a property exploited in some commercial desiccants. On heating above 250 °C, the completely anhydrous form calledβ-anhydrite or dead burned plaster is formed.