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Product Name: Calcium Sulfate
Chemical Formula: CaSO4
Common Names: Gypsum, Plaster of Paris, Anhydrite
Recommended Use: Construction materials, laboratory chemicals, food additives, industrial manufacturing
Supplier Details: Manufacturer and distributor contact numbers, address, emergency contact available through local or national poison control centers
CAS Number: 7778-18-9
UN Number: Not classified as hazardous for transport
Classification: Not classified as hazardous according to current OSHA Hazard Communication Standard
Most Important Hazards: Dust may irritate eyes, skin, and respiratory tract; prolonged or repeated exposure may cause dryness and slight abrasion
Signal Word: None
Pictograms: None required
Hazard Statements: May cause mechanical irritation to eyes or respiratory tract
Precautionary Statements: Avoid generation and inhalation of dust; wear protective gear during handling
Other Hazards: Possible slip hazard if spilled as a fine powder
Chemical Name: Calcium Sulfate dihydrate/anhydrite
Synonyms: Gypsum (dihydrate), Plaster of Paris (hemihydrate), Anhydrite (anhydrous)
CAS Number: 7778-18-9
EC Number: 231-900-3
Purity: Typically ranges from 90% to over 98% depending on grade and source
Impurities: Small traces of clay, silica, or other sediment depending on natural sources
Inhalation: Move person to fresh air; if breathing becomes difficult, seek medical advice
Eye Contact: Rinse thoroughly with water for at least 15 minutes; consult physician if irritation persists
Skin Contact: Brush off material; wash affected area with soap and water; remove and wash contaminated clothing
Ingestion: Rinse mouth; drink water, do not induce vomiting; consult a medical professional if symptoms develop
Most Important Symptoms & Effects: May cause dryness, irritation, redness, coughing, or sneezing
Suitable Extinguishing Media: Use water spray, foam, dry chemical, carbon dioxide for surrounding fire—material itself does not burn
Unsuitable Extinguishing Media: None known
Specific Hazards: Non-flammable, non-combustible; decomposition at high temperatures may release sulfur oxides
Protective Equipment: Firefighters should wear self-contained breathing apparatus and protective clothing
Special Instructions: Avoid inhalation of smoke or thermal decomposition products
Personal Precautions: Wear dust mask, goggles, gloves to avoid contact and inhalation
Environmental Precautions: Prevent large quantities from entering drains, sewers, or waterways; sweep up to prevent slip hazard
Methods for Containment: Sweep or vacuum up to minimize dust formation; use damp cloth or mop to control dust
Clean-Up Procedures: Dispose of according to local, regional, or national regulations; ventilate area after clean-up
Handling: Minimize dust generation and accumulation by using adequate local exhaust ventilation; avoid breathing dust; use protective equipment
Hygiene Measures: Wash hands and exposed skin after handling; do not eat, drink, or smoke while working
Storage: Store in a dry, cool, well-ventilated area; keep containers tightly closed; protect from moisture to prevent clumping; store away from incompatible materials such as acids
Occupational Exposure Limits: OSHA PEL (Total dust): 15 mg/m3; OSHA PEL (Respirable fraction): 5 mg/m3; ACGIH TLV: 10 mg/m3 (inhalable), 3 mg/m3 (respirable)
Engineering Controls: Use local exhaust ventilation; maintain adequate general ventilation; enclose processes to reduce dust
Personal Protective Equipment: Safety glasses or goggles; dust mask or respirator if exposure limits may be exceeded; gloves and coveralls for skin protection; wash exposed skin after handling
Environmental Exposure Controls: Keep materials out of waterways and sewers to prevent environmental contamination
Appearance: White or off-white odorless powder or crystalline solid
Odor: Odorless
Odor Threshold: Not applicable
pH: 5-7 (saturated solution)
Melting Point: Decomposes above 1400°C
Boiling Point: Not applicable (decomposes before boiling)
Flash Point: Non-flammable
Evaporation Rate: Not applicable
Solubility: Slightly soluble in water (2 g/L at 20°C)
Density: 2.3–2.9 g/cm3
Vapor Pressure: Not applicable
Partition Coefficient: Not applicable; insoluble in fats/oils
Auto-ignition Temperature: Not combustible
Decomposition Temperature: Begins to decompose about 150°C (dihydrate loses water)
Viscosity: Not applicable
Chemical Stability: Stable under normal ambient conditions and recommended storage
Reactivity: Inert under standard circumstances; reacts with strong acids to release sulfur dioxide gas
Hazardous Reactions: In contact with strong acids, may release toxic sulfur oxides
Conditions to Avoid: Moisture, extreme heat, strong acids
Incompatible Materials: Strong acids, aluminum (moist conditions)
Hazardous Decomposition Products: Sulfur oxides (SOx), calcium oxide on high-temperature decomposition
Acute Toxicity: Low toxicity by oral, dermal, and inhalation routes; LD50 (oral, rat): > 3000 mg/kg; not classified as toxic
Chronic Effects: Prolonged inhalation of dust may irritate respiratory tract; rarely, chronic exposure may lead to lung effects in case of poor workplace control
Skin Contact: Prolonged or repeated contact may cause dryness, irritation, chafing
Eye Contact: Mechanical irritation, redness, watering, discomfort
Sensitization: Not expected to cause allergic reactions
Carcinogenicity: Not listed by IARC, NTP, OSHA as a carcinogen
Mutagenicity: No known mutagenic effects
Reproductive Toxicity: No reported adverse effects
Other Information: Not absorbed through skin at concentrations typically encountered in workplace
Eco-toxicity: Not considered hazardous to aquatic life at normal concentrations; high concentrations may lead to clouding or physical coating in aquatic environments
Persistence and Degradability: Inorganic substance; not biodegradable but stable in environment
Bioaccumulation: Unlikely to accumulate in living organisms
Mobility in Soil: Low mobility in soil; precipitates or slowly dissolves
Other Adverse Effects: No significant environmental hazard expected at typical release levels; excessive spillage in streams may alter water hardness or physical conditions
Waste Treatment Methods: Dispose of according to local, state, and federal regulations as non-hazardous industrial waste
Waste Classification: Not a hazardous waste under RCRA; check for local regulation variance
Contaminated Packaging: Containers should be cleaned and reused or disposed of as non-hazardous material after thorough cleaning
Other Notes: Do not dump large quantities into drains, waterways, or sewers to prevent blockages or sediment buildup
UN Number: Not regulated
UN Proper Shipping Name: Not regulated
Transport Hazard Class: Not classified as dangerous goods for road (ADR), rail (RID), sea (IMDG), or air (IATA) transport
Packing Group: Not assigned
Special Precautions: Avoid generating dust during loading/unloading; keep dry during shipping
Environmental Hazards: Not classified as environmentally hazardous for transport purposes
US Regulations: Listed on TSCA Inventory; OSHA: Not hazardous; SARA Title III: Not reportable
EU Regulations: Registered under REACH; not classified as hazardous under CLP
Canada Regulations: Listed on DSL
Other International Regulations: Listed on AICS (Australia), ENCS (Japan), and other major chemical inventories
Labeling: Not required under GHS or EU classification for consumer or industrial use; general dust hazard labeling may apply in some jurisdictions
Workplace Restrictions: Subject to local occupational exposure limits for inert particulates
