CALCIUM SULPHATE DIHYDRATE

Calcium Sulphate Dihydrate is an inorganic calcium salt commonly known as gypsum, widely used in construction, industrial processing, food, pharmaceutical, and agricultural applications.
Calcium Sulphate Dihydrate is valued for its controlled setting behavior, chemical stability, and availability in high purity grades.
Calcium Sulphate Dihydrate serves as a fundamental raw material for plasters, cement additives, fillers, and functional excipients.

CAS Number: 10101-41-4
EC Number: 231-900-3
Molecular Formula: CaSO₄·2H₂O
Molecular Weight: 172.17 g/mol

Synonyms: Calcium Sulphate Dihydrate, Gypsum, Hydrated Calcium Sulphate, Calcium Sulfate Dihydrate, Plaster Stone, Calcium Sulphate Dihydrate, Calcium Sulfate Dihydrate, CaSO₄·2H₂O, Gypsum, Natural Gypsum, Hydrated Calcium Sulphate, Hydrated Calcium Sulfate, Calcium Sulphate Hydrate, Calcium Sulfate Hydrate, Dihydrated Calcium Sulphate, Dihydrated Calcium Sulfate, Gypsum Mineral, Gypsum Rock, Gypsum Powder, Gypsum Crystalline, Gypsum Fine Powder, Gypsum Granular, Gypsum Milled, Raw Gypsum, Refined Gypsum, High-Purity Gypsum, Pure Calcium Sulphate Dihydrate, Extra-Pure Calcium Sulphate Dihydrate, Technical Grade Calcium Sulphate Dihydrate, Industrial Grade Calcium Sulphate Dihydrate, Food Grade Calcium Sulphate (Dihydrate), Pharmaceutical Grade Calcium Sulphate Dihydrate, Reagent Grade Calcium Sulphate Dihydrate, Analytical Grade Calcium Sulphate Dihydrate, Calcium Sulphate Dihydrate USP, Calcium Sulphate Dihydrate EP, Calcium Sulphate Dihydrate BP, Calcium Sulphate Dihydrate FCC, Food Additive E516 (Dihydrate), Calcium Sulphate Setting Regulator, Cement Retarder Gypsum, Cement Additive Gypsum, Plaster Raw Material, Gypsum for Plasterboard, Gypsum Wallboard Material, Gypsum Drywall Core, Gypsum Construction Material, Gypsum Building Material, Gypsum Binder, Gypsum Filler, Gypsum Extender, Gypsum Soil Conditioner, Agricultural Gypsum, Gypsum Fertilizer Additive, Gypsum Calcium Source, Gypsum Sulfur Source, Gypsum Water Treatment Chemical, Gypsum Clarification Aid, Gypsum Industrial Mineral, Calcium Sulphate Dihydrate Inorganic Salt, Calcium Sulphate Dihydrate Mineral Compound, Calcium Sulphate Dihydrate Chemical Raw Material, Calcium Sulphate Dihydrate Industrial Chemical

APPLICATIONS

Calcium Sulphate Dihydrate is used in construction materials.
Calcium Sulphate Dihydrate is the primary raw material for gypsum plaster and plasterboard.
Calcium Sulphate Dihydrate controls setting time and mechanical strength in building products.

Calcium Sulphate Dihydrate is applied in cement and concrete formulations.
Calcium Sulphate Dihydrate regulates cement hydration and prevents flash setting.
Calcium Sulphate Dihydrate improves workability and consistency.

Calcium Sulphate Dihydrate is used in pharmaceutical formulations.
Calcium Sulphate Dihydrate functions as a filler and excipient in tablets.
Calcium Sulphate Dihydrate supports controlled release and tablet integrity.

Calcium Sulphate Dihydrate is used in food applications where permitted.
Calcium Sulphate Dihydrate acts as a firming agent and calcium source.
Calcium Sulphate Dihydrate is used in tofu production as a coagulant.

Calcium Sulphate Dihydrate is applied in agriculture.
Calcium Sulphate Dihydrate improves soil structure and calcium availability.
Calcium Sulphate Dihydrate reduces soil salinity and compaction.

Calcium Sulphate Dihydrate is used in industrial processes.
Calcium Sulphate Dihydrate serves as a filler and processing aid.
Calcium Sulphate Dihydrate supports mold making and casting applications.

Calcium Sulphate Dihydrate is used in construction as a primary component of gypsum plaster.
Calcium Sulphate Dihydrate provides smooth finishing surfaces in interior wall applications.
Calcium Sulphate Dihydrate improves workability of plaster-based materials.

Calcium Sulphate Dihydrate is used in drywall and gypsum board manufacturing.
Calcium Sulphate Dihydrate forms the core material of plasterboards.
Calcium Sulphate Dihydrate enhances fire resistance of building panels.

Calcium Sulphate Dihydrate is used in cement manufacturing.
Calcium Sulphate Dihydrate acts as a set regulator in Portland cement.
Calcium Sulphate Dihydrate prevents flash setting during cement hydration.

Calcium Sulphate Dihydrate is used in dental applications.
Calcium Sulphate Dihydrate is used for making dental molds and impressions.
Calcium Sulphate Dihydrate provides dimensional stability in dental casts.

Calcium Sulphate Dihydrate is used in orthopedic and medical casts.
Calcium Sulphate Dihydrate supports immobilization of fractured limbs.
Calcium Sulphate Dihydrate allows easy shaping and rapid setting.

Calcium Sulphate Dihydrate is used in ceramic mold production.
Calcium Sulphate Dihydrate enables precise shaping of ceramic components.
Calcium Sulphate Dihydrate improves surface detail reproduction.

Calcium Sulphate Dihydrate is used in sculpture and decorative arts.
Calcium Sulphate Dihydrate supports casting of detailed artistic forms.
Calcium Sulphate Dihydrate improves finish quality in decorative elements.

Calcium Sulphate Dihydrate is used in agriculture as a soil conditioner.
Calcium Sulphate Dihydrate improves soil structure and aeration.
Calcium Sulphate Dihydrate supplies calcium and sulfur nutrients to plants.

Calcium Sulphate Dihydrate is used in water treatment.
Calcium Sulphate Dihydrate assists in hardness control and clarification processes.
Calcium Sulphate Dihydrate supports removal of impurities from water systems.

Calcium Sulphate Dihydrate is used in food processing applications.
Calcium Sulphate Dihydrate acts as a firming agent in certain foods.
Calcium Sulphate Dihydrate improves texture stability in processed products.

Calcium Sulphate Dihydrate is used in pharmaceutical formulations.
Calcium Sulphate Dihydrate functions as an excipient and filler.
Calcium Sulphate Dihydrate supports controlled release of active ingredients.

Calcium Sulphate Dihydrate is used in laboratory teaching materials.
Calcium Sulphate Dihydrate demonstrates crystallization and hydration reactions.
Calcium Sulphate Dihydrate supports educational chemistry experiments.

Calcium Sulphate Dihydrate is used in mold-making for industrial prototyping.
Calcium Sulphate Dihydrate enables rapid production of prototype components.
Calcium Sulphate Dihydrate improves dimensional accuracy in molds.

Calcium Sulphate Dihydrate is used in prefabricated building elements.
Calcium Sulphate Dihydrate improves dimensional stability of prefabricated panels.

Calcium Sulphate Dihydrate is used in ceiling tile manufacturing.
Calcium Sulphate Dihydrate enhances acoustic performance of ceiling systems.

Calcium Sulphate Dihydrate is used in fire-resistant building materials.
Calcium Sulphate Dihydrate delays heat transfer during fire exposure.

Calcium Sulphate Dihydrate is used in lightweight construction blocks.
Calcium Sulphate Dihydrate reduces overall material density while maintaining strength.

Calcium Sulphate Dihydrate is used in rapid-setting repair mortars.
Calcium Sulphate Dihydrate enables fast turnaround in construction repairs.

Calcium Sulphate Dihydrate is used in architectural molding.
Calcium Sulphate Dihydrate allows production of detailed decorative profiles.

Calcium Sulphate Dihydrate is used in casting molds for metal prototypes.
Calcium Sulphate Dihydrate provides thermal insulation during casting operations.

Calcium Sulphate Dihydrate is used in investment casting processes.
Calcium Sulphate Dihydrate supports precise reproduction of complex shapes.

Calcium Sulphate Dihydrate is used in chalk production.
Calcium Sulphate Dihydrate improves writing performance on blackboards.

Calcium Sulphate Dihydrate is used in agricultural gypsum products.
Calcium Sulphate Dihydrate reduces soil salinity in sodic soils.

Calcium Sulphate Dihydrate is used in irrigation water treatment.
Calcium Sulphate Dihydrate improves water infiltration into compacted soils.

Calcium Sulphate Dihydrate is used in compost conditioning.
Calcium Sulphate Dihydrate reduces odor formation during composting.

Calcium Sulphate Dihydrate is used in animal bedding products.
Calcium Sulphate Dihydrate improves moisture absorption and hygiene.

Calcium Sulphate Dihydrate is used in feed additive carriers.
Calcium Sulphate Dihydrate supports uniform distribution of nutrients.

Calcium Sulphate Dihydrate is used in pharmaceutical tableting.
Calcium Sulphate Dihydrate improves compressibility of solid dosage forms.

Calcium Sulphate Dihydrate is used in controlled-release drug matrices.
Calcium Sulphate Dihydrate supports gradual dissolution profiles.

Calcium Sulphate Dihydrate is used in cosmetic powder formulations.
Calcium Sulphate Dihydrate improves flow and texture of pressed powders.

Calcium Sulphate Dihydrate is used in theatrical and film set construction.
Calcium Sulphate Dihydrate enables fast fabrication of scenery elements.

Calcium Sulphate Dihydrate is used in museum restoration works.
Calcium Sulphate Dihydrate supports conservation of historical artifacts.

Calcium Sulphate Dihydrate is used in art education materials.
Calcium Sulphate Dihydrate allows safe hands-on sculpting practice.

Calcium Sulphate Dihydrate is used in laboratory filtration aids.
Calcium Sulphate Dihydrate improves clarity of filtered solutions.

Calcium Sulphate Dihydrate is used in wastewater sludge stabilization.
Calcium Sulphate Dihydrate improves handling properties of dewatered sludge.

Calcium Sulphate Dihydrate is used in industrial spill containment.
Calcium Sulphate Dihydrate absorbs liquids and improves cleanup efficiency.

Calcium Sulphate Dihydrate is used in insulation boards for soundproofing.
Calcium Sulphate Dihydrate enhances noise reduction in building interiors.

Calcium Sulphate Dihydrate is used in laboratory crystallography studies.
Calcium Sulphate Dihydrate demonstrates controlled crystal growth behavior.

DESCRIPTION

Calcium Sulphate Dihydrate is a white to off-white crystalline solid.
Calcium Sulphate Dihydrate occurs naturally as gypsum in sedimentary deposits.
Calcium Sulphate Dihydrate can also be produced synthetically with controlled purity.

Calcium Sulphate Dihydrate contains two molecules of water of crystallization.
Calcium Sulphate Dihydrate partially dehydrates upon heating to form hemihydrate.
Calcium Sulphate Dihydrate exhibits reversible hydration behavior under controlled conditions.

Calcium Sulphate Dihydrate is odorless and non-flammable.
Calcium Sulphate Dihydrate shows good chemical stability under normal conditions.
Calcium Sulphate Dihydrate is compatible with many inorganic and organic materials.

Calcium Sulphate Dihydrate is environmentally benign and naturally occurring.
Calcium Sulphate Dihydrate is safe when handled according to standard industrial practices.
Calcium Sulphate Dihydrate should be protected from prolonged moisture exposure during storage.

Calcium Sulphate Dihydrate is a hydrated inorganic compound with the formula CaSO₄·2H₂O.
Calcium Sulphate Dihydrate is commonly known as gypsum.
Calcium Sulphate Dihydrate appears as a white to off-white crystalline solid.

Calcium Sulphate Dihydrate is slightly soluble in water.
Calcium Sulphate Dihydrate contains two molecules of water per calcium sulfate unit.
Calcium Sulphate Dihydrate loses water upon heating to form calcium sulfate hemihydrate.

Calcium Sulphate Dihydrate exhibits good thermal and chemical stability.
Calcium Sulphate Dihydrate shows low toxicity and is environmentally compatible.
Calcium Sulphate Dihydrate provides controlled setting behavior when processed.

Calcium Sulphate Dihydrate is widely available from natural mineral sources.
Calcium Sulphate Dihydrate is compatible with cementitious and polymer systems.
Calcium Sulphate Dihydrate is widely used in construction, medical, and industrial applications.

Calcium Sulphate Dihydrate should be stored in dry conditions.
Calcium Sulphate Dihydrate should be protected from moisture contamination.
Calcium Sulphate Dihydrate is valued for its versatility, safety, and functional performance.

PROPERTIES

Chemical Formula: CaSO₄·2H₂O
Molecular Weight: 172.17 g/mol
Appearance: White to off-white crystalline powder or granules
Odor: Odorless
Density: ~2.30–2.35 g/cm³ (true density)
Bulk Density: ~0.80–1.20 g/cm³ (grade dependent)
Melting Point: Decomposes at ~145–170°C (loss of water)
Boiling Point: Not applicable; decomposes before boiling
Solubility in Water: Slightly soluble; ~2.0–2.5 g/L at 25°C
Solubility in Acids: Soluble in dilute acids
pH (saturated solution): ~6.0–7.0
Thermal Behavior: Dehydrates to calcium sulphate hemihydrate upon heating
Hygroscopicity: Low
Chemical Stability: Stable under dry, ambient conditions
Reactivity: Reacts with acids and chelating agents
Storage Temperature: Store at ambient temperature in dry conditions

FIRST AID

Inhalation:
Move to fresh air if dust is inhaled.
Seek medical attention if irritation persists.

Skin Contact:
Wash with water.
Generally non-irritating.

Eye Contact:
Rinse with plenty of water for several minutes.
Seek medical advice if discomfort continues.

Ingestion:
Rinse mouth and drink water.
Seek medical advice if large quantities are ingested.

Note to Physicians:
Treat symptomatically.

HANDLING AND STORAGE

Handling:
Avoid generating excessive dust.
Use appropriate personal protective equipment when handling powders.
Ensure adequate ventilation in work areas.

Avoidance:
Avoid prolonged exposure to moisture.
Avoid contact with strong acids unless intended for processing.

Spill Procedures:
Sweep up mechanically and avoid dust formation.
Dispose of material according to local regulations.

Storage:
Store in tightly closed containers or bags.
Keep in a cool, dry, well-ventilated area.
Protect from moisture to maintain material integrity.