Material Safety Data Sheet: Zinc Citrate

Identification

Product Name: Zinc Citrate
Chemical Formula: C6H6O7Zn2
CAS Number: 546-46-3
Synonyms: Zinc dihydrogen citrate, Citric acid zinc salt
Recommended Use: Used in toothpaste, mouthwash, dietary supplements, and some industrial applications
Supplier Information: Manufacturer’s name and address on package label
Contact number for emergencies: Provided by manufacturer or local poison control center

Hazard Identification

GHS Classification: Not classified as hazardous per OSHA regulations
Pictogram: No pictogram assigned under current standards
Signal word: No signal word assigned
Hazard statements: May irritate eyes, skin, and respiratory system in concentrated forms
Precautionary statements: Avoid direct contact with eyes, minimize inhalation of dust, maintain good hygiene
Routes of exposure: Inhalation, ingestion, skin and eye contact

Composition / Information on Ingredients

Chemical Name: Zinc Citrate
Concentration: Typically >99% pure
Impurities: Trace levels of other zinc salts or citric acid derivatives depending on manufacturer

First Aid Measures

Inhalation: Move exposed person to fresh air, keep warm and at rest, seek medical attention for persistent symptoms
Skin Contact: Wash thoroughly with soap and water, remove contaminated clothing
Eye Contact: Rinse cautiously with water for several minutes, remove contact lenses if present and easy, continue rinsing
Ingestion: Rinse mouth, do not induce vomiting, seek medical attention if large amounts are swallowed or discomfort persists

Fire-Fighting Measures

Suitable Extinguishing Media: Use water spray, dry chemical, foam or carbon dioxide, do not use high-pressure water stream
Specific Hazards: Product does not burn but may emit toxic fumes if decomposed in fire
Protective Equipment: Firefighters should wear self-contained breathing apparatus and full protective gear
Explosion Data: Not sensitive to mechanical impact or static discharge under normal use
Combustion Products: May produce zinc oxide fumes and carbon oxides

Accidental Release Measures

Spill Response: Avoid creating dust, ventilate area, use wet methods to minimize airborne particulate
Personal Precautions: Wear appropriate protective gear including gloves, safety goggles, and mask
Environmental Precautions: Prevent entry into waterways or soil, collect and store in suitable container for disposal
Clean-up Methods: Sweep up spilled material, deposit in labeled waste container, wash area with water

Handling and Storage

Handling: Use local exhaust ventilation to keep dust levels low, avoid contact with eyes and skin, wash hands after handling
Storage Conditions: Store in tightly closed container, keep in a dry, cool, and well-ventilated place
Storage Incompatibility: Keep away from acids and strong oxidizers, avoid exposure to moisture
Container Materials: Use containers and packaging materials compatible with zinc citrate, avoid reactive metals

Exposure Controls and Personal Protection

Exposure Limits: No specific OSHA PEL or ACGIH TLV set for zinc citrate
Engineering Controls: Use process enclosures, local exhaust ventilation, or other engineering controls to maintain airborne concentrations below recommended exposure limits
Personal Protective Equipment: Safety glasses or goggles for eye protection, nitrile or rubber gloves for skin, dust mask or NIOSH-approved respirator for airborne particulate
Work Practices: Maintain good housekeeping, wash hands before eating or drinking, change contaminated clothing
Hygiene Measures: Do not eat, drink, or smoke where powder is handled, wash thoroughly after handling

Physical and Chemical Properties

Appearance: White to off-white crystalline powder
Odor: Odorless
Odor Threshold: Not applicable
pH: Slightly acidic in aqueous solution (pH 4–6)
Melting Point: Decomposes above 150°C
Boiling Point: Not applicable (decomposes)
Solubility: Slightly soluble in water, soluble in acidic solutions
Density: 2.3–2.4 g/cm³
Vapor Pressure: Not applicable
Partition Coefficient (n-octanol/water): Not available
Flash Point: Not flammable
Evaporation Rate: Not applicable

Stability and Reactivity

Chemical Stability: Stable under normal temperatures and pressures when stored in sealed container
Reactivity: Not expected to react violently under standard handling
Hazardous reactions: None under normal processing
Conditions to Avoid: Excessive heat, moisture, contact with strong acids or bases
Incompatible Materials: Strong oxidizing agents, acids, strong bases
Hazardous Decomposition Products: Oxides of zinc and carbon when heated to decomposition

Toxicological Information

Routes of Exposure: Inhalation, skin and eye contact, ingestion
Acute Effects: May cause mild irritation to skin, eyes, respiratory and gastrointestinal tracts
Chronic Effects: No long-term health effects expected at low exposure, excessive ingestion may affect zinc balance in the body
LD50 (oral, rat): Estimated >5000 mg/kg indicating low acute toxicity
Carcinogenicity: Not classified as carcinogenic by IARC, OSHA, or NTP
Mutagenicity: No data available suggesting mutagenic risk
Reproductive Toxicity: No evidence of adverse reproductive or developmental effects

Ecological Information

Toxicity to Aquatic Life: Zinc compounds can be toxic to aquatic organisms at high concentrations
Persistence and Degradability: Inorganic compound, does not break down readily in environment
Bioaccumulation: Zinc may accumulate in organisms but citrate portion biodegrades
Soil Mobility: Zinc ions may bind to soil and sediment
Other Effects: Release in large quantities can disrupt nearby aquatic ecosystems

Disposal Considerations

Waste Treatment Methods: Dispose of in accordance with local, regional, national, and international regulations
Sewage Disposal Recommendations: Avoid release into sewers or natural waterways
Packaging Disposal: Clean empty packaging may be recycled, contaminated packaging should be handled as hazardous waste
Waste Code: Not classified under federal hazardous waste codes, but check regional authority for details

Transport Information

UN Number: Not regulated as a hazardous material for transport
Proper Shipping Name: Zinc Citrate
Transport Hazard Class: Not classified
Packing Group: Not assigned
Environmental Hazards: No significant risk during normal transportation
Special Transport Precautions: Protect containers from physical damage and moisture, secure loads to prevent shifting

Regulatory Information

TSCA Status: Listed
REACH Status: Registered for use in the European Union
SARA Title III: Not subject to Section 313 reporting
California Proposition 65: Not listed
WHMIS Classification (Canada): Not controlled
Other regulations: Follow workplace safety guidelines for handling powders and chemicals