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Product Name: Dicalcium Phosphate
Chemical Formula: CaHPO4·2H2O
Synonyms: Calcium monohydrogen phosphate, Dibasic calcium phosphate
CAS Number: 7757-93-9
Relevant Use: Animal feed additive, nutritional supplement in food, fertilizer, tablet excipient
Manufacturer: Listed in supplier section
Emergency Telephone: Contact local poison control, fire department, or provider contact point.
Classification: Not classified as hazardous under GHS for normal use, but dust may irritate eyes and airways
Routes of Exposure: Inhalation, ingestion, skin or eye contact
Symptoms: Eye and respiratory discomfort from dust, mild skin dryness on prolonged contact
Label Elements: No pictograms required; precautionary statements focus on dust control and hygiene
Target Organs: Eyes, respiratory system in occupational settings with poor ventilation
Chronic Effects: No significant evidence for chronic health damage in common handling.
Main Ingredient: Dicalcium Phosphate, CaHPO4·2H2O, typically >97%
Other Components: Water of hydration (about 18-22% in the dihydrate form)
Impurities: Trace levels of heavy metals (lead, arsenic, cadmium) within regulatory limits for feed/food grade material
Other Additives: None for pure technical grade; defluorinated and feed grades can contain minimal amounts of insoluble matter
Inhalation: Move to fresh air, rinse mouth and nose with water, seek medical advice if persistent irritation or coughing starts
Skin Contact: Remove contaminated clothing, wash affected areas thoroughly with soap and water, seek medical attention if irritation develops
Eye Contact: Rinse immediately with clean water for at least fifteen minutes, lift eyelids to flush thoroughly, consult a physician for ongoing discomfort
Ingestion: Rinse mouth, drink water if conscious, consult medical care for large or deliberate ingestion
Flammability: Not flammable, not explosive
Extinguishing Media: Use water spray, foam, or carbon dioxide for surrounding fire materials
Thermal Decomposition: Fumes of calcium oxide and phosphorus oxides possible at high temperature
Firefighting Procedures: Firefighters need standard personal protective equipment and self-contained breathing apparatus in case of fumes
Personal Protection: Use dust mask, eye protection, gloves to limit contact with dust
Spill Control: Sweep up material carefully, avoid generating clouds of dust, collect in sealed containers for disposal
Environmental Precaution: Prevent large quantities entering water or soil; small amounts in general handling unlikely to pose hazard
Cleanup Methods: Rinse remaining residue with water if outside or damp cloth indoors; increase ventilation in enclosed spaces
Handling: Minimize dust during transfer and mixing, use local exhaust or ventilation, avoid contact with eyes and skin, wash hands after use
Storage: Store in cool, dry, well-ventilated location, in closed containers, separate from acids and moisture sources
Incompatibilities: Strong acids (produce phosphoric acid and calcium salts); store away from food, animal feed if not intended for those uses
Storage Life: Stable for years if kept dry and sealed, packaging integrity should be checked regularly for damage or moisture
Exposure Limits: OSHA/ACGIH nuisance dust limit at 10 mg/m3 (total dust), 5 mg/m3 (respirable fraction)
Engineering Controls: Local exhaust ventilation, closed handling systems for bulk quantities
Respiratory Protection: NIOSH dust mask (N95 or equivalent) for dusty work
Skin Protection: Impermeable gloves for sensitive individuals
Eye Protection: Safety goggles
Hygiene: Wash thoroughly after handling, change clothes if contaminated
Appearance: White or off-white odorless powder or granular solid
Odor: None
pH (10% solution): 6.5 – 7.5
Melting/Decomposition: >450°C (decomposes to calcium pyrophosphate and water)
Solubility: Slightly soluble in water (about 2 g/l at 25°C), insoluble in alcohol
Density: About 2.3 g/cm3 for the dihydrate
Vapor Pressure: Not applicable (solid mineral compound)
Other: No significant volatility, stability remains in typical storage
Chemical Stability: Chemically stable under normal conditions
Reactivity: Reacts with acids to release phosphoric acid and calcium salts
Conditions to Avoid: Prolonged moisture exposure (clumping), contact with strong acids
Incompatible Materials: Strong acids, strong oxidizers
Hazardous Decomposition: Heating above 450°C can release phosphorus oxides and calcium oxide
Acute Toxicity: Very low, LD50 (oral, rat) >10,000 mg/kg
Skin Irritation: Non-irritating to most people on ordinary contact
Eye Irritation: Dust may cause temporary irritation
Sensitization: Not known to cause skin sensitization
Chronic Effects: No reported significant chronic toxicity from normal occupational or dietary exposure
Carcinogenicity, Mutagenicity, Reproductive Effect: Not considered a carcinogen, mutagen, or reproductive toxin under GHS or IARC classifications
Environmental Fate: In soil/water, dissociates into naturally occurring ions (calcium, phosphate)
Mobility: Limited in water by low solubility; phosphate can bind to soil and contribute to eutrophication in excess
Aquatic Toxicity: Low toxicity to aquatic life at normal concentrations, but nutrient enrichment from phosphates may cause algal blooms
Persistence: Phosphate ions persist as part of natural nutrient cycles
Bioaccumulation: Not significant for intended use
Product Disposal: Dispose of small amounts in general trash if permitted; larger amounts should follow local, regional, and national regulations for waste phosphates
Packaging Disposal: Rinse empty containers, recycle plastic/metal/drums if possible
Special Precautions: Avoid dumping directly into water courses, storm drains, or onto open land; mixture with acids before disposal should be avoided due to potential fume release
UN Number: Not regulated as hazardous material
Transport Hazard Class: Not classified
Packing Group: None identified
Labeling Requirements: None for general commercial or non-hazardous bulk grade
Special Transport Notes: Keep containers dry, secured from rupture, spills
GHS Classification: Not classified as hazardous
OSHA/WHMIS Status: Not classified as hazardous
TSCA: Listed on US Toxic Substances Control Act (TSCA) inventory
EINECS/ELINCS: European inventory compliant
Other: Compliant with FDA and European regulations for food/feed grade if appropriate purity achieved; check regional limits for impurities (fluorides, heavy metals) in food and feed use
