Calcium Sulphate (Anhydrous)

Synonyms: Anhydrous Gypsum; Anhydrite; Anhydrous Calcium Sulfate



Molecular Formula


Molecular Weight



White Powder


Purity (as CaSO4)

98.0% MIN

*Also available Pure, Pharma passing, LR, AR and ACS Grade

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Material Safety Data Sheet

Calcium Sulphate (Anhydrous)


Section 1: Chemical Product and Company Identification


Chemical Name: Calcium Sulphate (Anhydrous)


CAS#: 7778-18-9

RTECS: WS6920000

TSCA: TSCA 8(b) inventory: Calcium sulfate, anhydrous

CI#: Not applicable.

Synonym: DRIERITE; karstenite; muriacite; anhydrous

sulfate of lime; anhydrous gypsum

Chemical Formula: CaSO4



Contact Information:


Vishnupriya Chemicals Pvt. Ltd.


Office No. 7, Meridian apartments

Lake Hills Road, New MLA Quarters

Basheerbagh, Hyderabad 63,  A.P

Tel :  040 - 23225550

Fax : 040 23223177

Email :

Website :


Section 2: Composition and Information on Ingredients






% by Weight

Calcium Sulphate (Anhydrous)




Toxicological Data on Ingredients:  Not applicable.


Section 3: Hazards Identification


Potential Acute Health Effects: Slightly hazardous in case of skin contact (irritant), of eye contact (irritant), of ingestion, of inhalation.


Potential Chronic Health Effects:





The substance may be toxic to lungs, upper respiratory tract.

Repeated or prolonged exposure to the substance can produce target organs damage.


Section 4: First Aid Measures


Eye Contact:

Check for and remove any contact lenses. In case of contact, immediately flush eyes with plenty of water for at least 15 minutes. Cold water may be used. WARM water MUST be used. Get medical attention if irritation occurs.


Skin Contact: Wash with soap and water. Cover the irritated skin with an emollient. Get medical attention if irritation develops.


Serious Skin Contact: Not available.



If inhaled, remove to fresh air. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical attention.


Serious Inhalation: Not available.



Do NOT induce vomiting unless directed to do so by medical personnel. Never give anything by mouth to an unconscious person. If large quantities of this material are swallowed, call a physician immediately. Loosen tight clothing such as a collar, tie, belt or waistband.


Serious Ingestion: Not available.


Section 5: Fire and Explosion Data


Flammability of the Product: Non-flammable.


Auto-Ignition Temperature: Not applicable.


Flash Points: Not applicable.


Flammable Limits: Not applicable.


Products of Combustion: Not available.


Fire Hazards in Presence of Various Substances: Not applicable.


Explosion Hazards in Presence of Various Substances:

Risks of explosion of the product in presence of mechanical impact: Not available.

Risks of explosion of the product in presence of static discharge: Not available.

Slightly explosive in presence of heat.


Fire Fighting Media and Instructions: Not applicable.


Special Remarks on Fire Hazards:

Calcium Sulfate mixed with phosphorus will ignite at high temperatures.

When primed at high temperature with potassium nitrate-calcium silicide mixture, calcium sulfate mixed with excess red phosphorus will burn.


Special Remarks on Explosion Hazards:

Contact with diazomethane causes an exothermic reaction which may lead to detonation.

Many metal oxo-compounds (nitrates, oxides, and particulary sulfates) and sulfides are reduced violently or explosively (undergo a thermite reaction) on heating an intimate mixture with aluminum powder to a suitably high temperture to initiate the reaction. A violent or explosive reaction can occur upon heating when calcium sulfate is mixed with aluminum powder.

Containers may explode when heated.


Section 6: Accidental Release Measures


Small Spill:

Use appropriate tools to put the spilled solid in a convenient waste disposal container. Finish cleaning by spreading water on the contaminated surface and dispose of according to local and regional authority requirements.


Large Spill:

Use a shovel to put the material into a convenient waste disposal container. Finish cleaning by spreading water on the contaminated surface and allow to evacuate through the sanitary system. Be careful that the product is not present at a concentration level above TLV. Check TLV on the MSDS and with local authorities.


Section 7: Handling and Storage


Precautions: Do not breathe dust. Keep away from incompatibles such as oxidizing agents, acids.


Storage: Keep container tightly closed. Keep container in a cool, well-ventilated area. Hygroscopic


Section 8: Exposure Controls/Personal Protection


Engineering Controls:

Use process enclosures, local exhaust ventilation, or other engineering controls to keep airborne levels below recommended exposure limits. If user operations generate dust, fume or mist, use ventilation to keep exposure to airborne contaminants below the exposure limit.


Personal Protection: Safety glasses. Lab coat. Gloves (impervious).


Personal Protection in Case of a Large Spill:

Splash goggles. Full suit. Boots. Gloves. Suggested protective clothing might not be sufficient; consult a specialist BEFORE handling this product.


Exposure Limits:

TWA: 15 (mg/m3) from OSHA (PEL) [United States] Inhalation Total.

TWA: 5 (mg/m3) [Quebec Canada]; 3 (mg/m3)[British Columbia Canada] Inhalation Respirable.

TWA: 10 (mg/m3) from NIOSH [United States] Inhalation Total.

TWA: 5 (mg/m3) from NIOSH [United States] Inhalation Respirable.

TWA: 5 (mg/m3) from OSHA (PEL) [United States] Inhalation Respirable.

TWA: 5 (mg/m3) [United Kingdom (UK)] Inhalation Respirable.

TWA: 10 (mg/m3) [United Kingdom (UK)] Inhalation Total.

TWA: 10 (mg/m3) from ACGIH (TLV) [United States] Inhalation Total.

TWA: 10 STEL: 20 (mg/m3) [Canada] Inhalation Total.3

Consult local authorities for acceptable exposure limits.


Section 9: Physical and Chemical Properties


Physical state and appearance: Solid. (Crystals solid. Powdered solid.)


Odor: Odorless.


Taste: Not available.


Molecular Weight: 136.14 g/mole



White or white with varied colored (blue, gray or reddish) tinge


pH (1% soln/water): Not available.


Boiling Point: Not available.


Melting Point: 1450C (2642F)


Critical Temperature: Not available.


Specific Gravity: 2.96 (Water = 1)


Vapor Pressure: Not applicable.


Vapor Density: Not available.


Volatility: Not available.


Odor Threshold: Not available.


Water/Oil Dist. Coeff.: Not available.


Ionicity (in Water): Not available.


Dispersion Properties: Not available.


Solubility: Very slightly soluble in cold water.


Section 10: Stability and Reactivity Data


Stability: The product is stable.


Instability Temperature: Not available.


Conditions of Instability: Moisture, incompatible materials


Incompatibility with various substances: Reactive with oxidizing agents, acids.


Corrosivity: Non-corrosive in presence of glass.


Special Remarks on Reactivity:

Incompatible with Diazomethane, aluminum, magnesium, phosphorous.

The anhydrous form cannot set with water. Hygroscopic; keep container tightly closed.


Special Remarks on Corrosivity: Not available.


Polymerization: Will not occur.


Section 11: Toxicological Information


Routes of Entry: Inhalation. Ingestion.

Toxicity to Animals:

LD50: Not available.

LC50: Not available.


Chronic Effects on Humans: May cause damage to the following organs: lungs, upper respiratory tract.


Other Toxic Effects on Humans: Slightly hazardous in case of skin contact (irritant), of ingestion, of inhalation.


Special Remarks on Toxicity to Animals: Not available.


Special Remarks on Chronic Effects on Humans: Not available.


Special Remarks on other Toxic Effects on Humans:

Acute Potential Health Effects:

Skin: Causes skin irritation.

Eyes: Causes eye irritation with out any adverse effects. May cause conjunctivitis.

Inhalation: Causes respiratory tract and mucous membrane irritation. Symptoms may include coughing, rhinitis, laryngitis, pharyngitis, reactions of tracheal and bronchial membranes, sneezing, pneumonia, impaired of sense of smell and taste, bleeding from the nose, and labored breathing after excessive inhalation.

Ingestion: May cause digestive tract irritation. Because it hardens quickly after absorbing moisture, its ingestion may result in obstruction, particularly of the pylorus.

Chronic Potential Health Effects:

Inhalation: Prolonged or repeated inhalation may produce unspecified effects on the lungs.

Medical Conditions Generally Aggravated by Exposure: Pre-existing upper respiratory and lung diseases such as, but not limited to Bronchitis, Emphysema, and Asthma.


Section 12: Ecological Information


Ecotoxicity: Not available.


BOD5 and COD: Not available.


Products of Biodegradation:

Possibly hazardous short term degradation products are not likely. However, long term degradation products may arise.


Toxicity of the Products of Biodegradation: The product itself and its products of degradation are not toxic.


Special Remarks on the Products of Biodegradation: Not available.


Section 13: Disposal Considerations


Waste Disposal:

Waste must be disposed of in accordance with federal, state and local environmental control regulations.





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