Material Safety Data Sheet – Zinc Acetate Anhydrous

Identification

Product Name: Zinc Acetate Anhydrous
Chemical Formula: C4H6O4Zn
Chemical Family: Organic Zinc Compound
CAS Number: 557-34-6
Synonyms: Acetic acid, zinc salt, anhydrous zinc diacetate
Recommended Use: Laboratory reagent, mordant in dyeing, wood preservation, industrial manufacturing, feed additive
Supplier Information: Manufacturer address, technical support contact phone number, email for further information about safe handling, and emergency response
Emergency Phone: 24-hour emergency response line and local poison control center contact

Hazard Identification

GHS Classification: Acute Toxicity Oral (Category 4), Skin Irritation (Category 2), Eye Irritation (Category 2A), Specific Target Organ Toxicity – Single Exposure (Category 3)
Signal Word: Warning
Hazard Statements: Harmful if swallowed, causes skin and eye irritation, may cause respiratory irritation
Pictograms: Exclamation mark symbol on a white background
Precautionary Statements: Avoid breathing dust, wash hands thoroughly after handling, use personal protective equipment as required, seek medical attention if any symptoms persist after exposure
Other Hazards: May cause gastrointestinal discomfort, no data available regarding carcinogenicity or reproductive toxicity, dust may irritate mucous membranes

Composition / Information on Ingredients

Chemical Name: Zinc Acetate Anhydrous
Common Name: Zinc acetate
Component: Zinc (Zn), acetate ion
Concentration: 100% (no significant impurities likely to contribute to hazards)
CAS Number: 557-34-6
Impurities: None reported above regulatory disclosure thresholds

First Aid Measures

Inhalation: Remove person to fresh air, keep at rest in comfortable position, seek medical attention if respiratory symptoms develop or persist
Skin Contact: Rinse thoroughly with soap and water, remove contaminated clothing, see a doctor for continued discomfort or irritation
Eye Contact: Flush eyes with water for at least 15 minutes, remove contact lenses if possible, seek immediate medical advice
Ingestion: Do not induce vomiting, rinse mouth with water, get immediate medical assistance if large amounts swallowed
Most Important Symptoms: Burning sensation, coughing, headache, nausea, irritation of skin, eyes, and respiratory tract
Medical Attention: Symptomatic treatment for irritation or allergic response, close observation for breathing difficulty

Fire-Fighting Measures

Suitable Extinguishing Media: Dry chemical powder, foam, carbon dioxide, water spray
Unsuitable Extinguishing Media: Direct jet of water as it may spread the chemical
Special Hazards: Product may emit toxic and irritating fumes (including zinc oxide, acetic acid vapors) in case of fire
Protective Equipment: Firefighters must wear self-contained breathing apparatus and fully protective clothing to avoid contact with fumes
Advice for Firefighters: Contain run-off to prevent environmental contamination, cool containers with water spray to prevent heat-induced rupture and dispersal

Accidental Release Measures

Personal Precautions: Evacuate area if large spill occurs, restrict access to trained personnel only, ensure adequate ventilation, avoid dust generation
Protective Equipment: Use approved respirators, chemical safety goggles, certified gloves, and protective clothing
Environmental Precautions: Prevent entry into sewers, watercourses, and soil. Notify authorities if environmental contamination occurs
Methods for Clean-Up: Carefully sweep up without creating dust, collect into containers for disposal, clean contaminated surface with water and detergent, ventilate spill area
Cleanup Advice: Spill residues must be disposed of as hazardous waste; avoid breathing dust during cleanup, and bag waste in labeled, sealed containers

Handling and Storage

Handling: Use only in well-ventilated locations, avoid creating or inhaling dust, wear appropriate personal protection, keep away from food and incompatibles
Hygiene Measures: Wash hands thoroughly after use, do not eat, drink, or smoke when handling product, wash contaminated clothing before reuse
Storage Conditions: Store in tightly closed, properly labeled containers, in cool, dry, and well-ventilated areas, protect from humidity and incompatible substances such as strong acids and oxidizers
Segregation: Keep separate from acidic and oxidizing materials, avoid storage with food or drink
Packaging: Use corrosion-resistant containers, check packaging for signs of degradation or leaks before use

Exposure Controls and Personal Protection

Occupational Exposure Limits: OSHA PEL (zinc compounds, as Zn): 5 mg/m³ (TWA, respirable fraction), ACGIH TLV: 2 mg/m³ (TWA, as Zn), consult local regulations for updates
Engineering Controls: Mechanical exhaust ventilation, local extraction to control airborne concentration, safety shower and eyewash stations accessible in work area
Personal Protection: Approved respirator for dust, safety goggles, chemical-resistant gloves, lab coat or industrial coveralls, avoid skin contact
Environmental Exposure Controls: Prevent accidental release into the environment, monitor air quality in manufacturing or recovery areas

Physical and Chemical Properties

Appearance: White crystalline powder
Odor: Slight acetous (vinegar-like), generally odorless in solid form
Odor Threshold: No data available
pH: 6 – 7 (50 g/L in water, 20°C)
Melting Point: 237°C (decomposes)
Boiling Point: Decomposes before boiling
Flash Point: Not applicable
Evaporation Rate: Not volatile
Flammability: Non-flammable solid
Vapor Pressure: Negligible at ambient temperature
Solubility: Easily soluble in water, soluble in alcohol, insoluble in ether
Partition Coefficient (n-octanol/water): No data available
Vapor Density: Not relevant (solid at room temperature)
Relative Density: 1.84 g/cm³
Decomposition Temperature: Above 237°C
Viscosity: Not relevant

Stability and Reactivity

Chemical Stability: Stable under recommended storage and handling conditions
Reactivity: Shows moderate reactivity with acids (releases acetic acid fumes), reacts with strong oxidizers
Hazardous Reactions: May react exothermically with acids and oxidizers, can release toxic zinc oxide or acetic acid vapors during decomposition
Conditions to Avoid: Moisture, heat, exposure to strong acids or oxidizing agents
Hazardous Decomposition Products: Zinc oxide fume, acetic acid gas, potential carbon oxides if burned
Incompatible Materials: Strong acids, strong oxidizers, reducing agents

Toxicological Information

Acute Toxicity: Oral LD50 in rats: 350 mg/kg – 500 mg/kg
Routes of Exposure: Inhalation, ingestion, dermal contact, eye contact
Symptoms: Irritation of skin, eyes, respiratory system, nausea, vomiting, headache, stomach pain on ingestion
Sensitization: No evidence of skin sensitization from published studies
Chronic Exposure: Extended or repeated exposure can lead to gastrointestinal distress, loss of appetite, neurological symptoms like drowsiness and confusion
Carcinogenicity: No component listed by IARC, NTP, or OSHA as a carcinogen
Reproductive Effects: No clear evidence in animal studies; excessive zinc exposure can affect fertility in humans
Other Data: Large doses may interfere with copper absorption, risk of zinc toxicity increased in those with preexisting health conditions

Ecological Information

Aquatic Toxicity: Toxic to aquatic life, harmful to fish and invertebrates, LC50 (fish): 1.1 mg/L (96 hours)
Persistence and Degradability: Not rapidly biodegradable, zinc ion binds strongly in soils
Bioaccumulation Potential: Zinc may accumulate in aquatic organisms, potential for trophic transfer in food webs
Mobility in Soil: Moderate mobility, leaching potential if released in large amounts; forms insoluble complexes in some soil conditions
Other Adverse Effects: Large spills can disrupt aquatic ecosystems, restrict release to environment, report according to local regulations
Precautions: Collect and contain water used for firefighting, avoid direct release into water courses, observe regulatory restrictions for environmental protection

Disposal Considerations

Waste Disposal: Dispose of as hazardous chemical waste via licensed contractor, follow local and national hazardous waste regulations
Container Disposal: Empty package must be triple rinsed, offer containers for recycling if possible or dispose of in accordance with regulatory requirements
Precautions: Do not discharge to sewers or environment, contaminated packaging handled with same precautions as product
Other Advice: Retain all records of disposal, keep away from incompatible wastes, consult appropriate authorities for guidance on large disposals

Transport Information

UN Number: Not classified as hazardous for transport
UN Proper Shipping Name: Zinc Acetate Anhydrous
Transport Hazard Class: Not regulated (as per ADR/RID, IMDG, IATA), not a marine pollutant
Packing Group: Not applicable
Special Precautions: Avoid breakage or spillage during transport, protect packaging from moisture
Transport Labels: No specific labeling required for general carriage; ensure “Keep Dry” symbol for export shipments

Regulatory Information

Regulated Under: OSHA Hazard Communication Standard (29 CFR 1910.1200) as hazardous
Inventory List Status: TSCA: Listed, DSL/NDSL: Listed, EINECS/ELINCS: Listed
Superfund Amendments and Reauthorization Act (SARA): SARA 313: Zinc compounds - subject to reporting
California Proposition 65: Not listed
Other Regulations: Subject to standard workplace exposure limits and safety requirements under RCRA, CERCLA if large quantity released
Label Requirements: Standard hazard warnings as outlined on GHS compliant labeling, proper chemical name and emergency number
Restrictions: Not for use in pharmaceutical, food, or beverage production unless otherwise specifically approved