Calcium Sulfate Hemihydrate, having the chemical formula CaSO4-1/2H2O or Ca2H2O9S2, is a
monohydrate calcium salt. It appears as white or yellowish, odorless, crystalline solid at ambient
conditions and is sparingly soluble in water. It is produced by heating gypsum at 373 K, which
results in loss of water molecules to form a hemihydrate. It is famously known as Plaster of Paris
and is also termed as Alabaster, Gypsum Hemihydrate, and Karstenite. It forms a paste when mixed
with water that soon hardens into a solid and is widely used in making casts, molds, and sculpture.
Our Calcium Sulfate Hemihydrate is recommended for both domestic and commercial scale
applications. Lab Alley is selling its premium quality products online at laballey.com in the United
States of America (USA).
Construction industry
Sculpture making
Home Decor
Competitive pricing and well-stocked US-based inventory.
Fast 1-2 business days shipping, including hazmat transport.
Exceptional customer service and chemical technical support.
Delivery on budget, on time, every time.
Product Information
More Information
CAS
10034-76-1
Molecular formula
CaSO4-1/2H2O
Molecular weight
145.15
Autoship Available
No
Reviews
Safety and Shipping
Hygroscopic
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Please contact us to request a Safety Data Sheet (SDS) and Certificate of Analysis (COA) for Calcium Sulfate Hemihydrate (Plaster of Paris).
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This chemical will only be shipped to addresses that are:
Businesses
Schools and Universities
Laboratories
If you use a residential address during checkout, we will automatically remove this item from your order prior to shipping.
If your order includes more than 1 lb of mercury, it must be shipped to a commercial address, lab, or school.
Please note that we’re unable to ship mercury—of any amount—to apartments or shipping/parcel stores.
Ineligible orders will be automatically canceled.
If you are purchasing SDA in 5 gallons or more, you are required to provide a TTB permit showing how much of the product you are allowed to purchase per year. Please email your TTB permit to customercare@laballey and include your Order Number.
