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Product Name: Ammonium Zinc Nitrite
Chemical Formula: (NH4)2Zn(NO2)4
CAS Number: 13682-76-9
Synonyms: Zinc Nitrite Ammonium Salt
Recommended Use: Corrosion inhibitor, laboratory reagent, specialty coatings manufacturing
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Classification: Oxidizing solid (Category 2), Acute toxicity (Category 4, oral), Skin irritation (Category 2), Eye irritation (Category 2A)
GHS Label Elements: Flame over circle, Exclamation mark
Signal Word: Warning
Hazard Statements: May cause fire or explosion; strong oxidizer. Harmful if swallowed. Causes skin irritation. Causes serious eye irritation.
Precautionary Statements: Keep away from heat, clothing, and combustible materials. Use personal protective equipment as required. Wash hands thoroughly after handling.
Health Hazards: Inhalation of dust may cause respiratory tract irritation and shortness of breath. Prolonged or repeated exposure may lead to sensitization or chronic effects.
Environmental Hazards: Very toxic to aquatic life with long lasting effects. Avoid release to the environment.
Main Ingredient: Ammonium Zinc Nitrite
Chemical Identity: (NH4)2Zn(NO2)4
Content: 97-99%
Impurities: Water, Ammonium Compounds, Zinc Compounds (<2%)
Other Additives: None
General Advice: Remove from exposure as soon as possible. Seek medical attention if symptoms develop or persist.
Inhalation: Move victim to fresh air. Keep warm and at rest. If breathing is difficult, provide oxygen. If not breathing, begin artificial respiration.
Skin Contact: Wash with plenty of soap and running water. Remove contaminated clothing immediately. If irritation develops, consult a physician.
Eye Contact: Rinse eyes with clean water for at least 15 minutes while holding eyelids apart. Remove contact lenses if present. Seek medical assistance.
Ingestion: Do not induce vomiting. Rinse mouth thoroughly with water. Give water to drink if the victim is conscious. Call poison control or physician.
Suitable Extinguishing Media: Water spray, foam. Do not use carbon dioxide or dry chemical.
Special Hazards: May release toxic nitrogen oxides, zinc oxides, and ammonia vapors upon heating or combustion. Strong oxidizer: intensifies fire.
Firefighting Instructions: Fight fire from safe distance or protected location. Use water spray to cool containers exposed to fire. Withdraw immediately if fire gets out of control.
Protective Equipment: Wear self-contained breathing apparatus and full protective clothing.
Personal Precautions: Evacuate area. Avoid contact with skin, eyes, and clothing. Use personal protective equipment: respirator, gloves, goggles.
Environmental Precautions: Prevent entry into sewers, surface water, and groundwater systems. Notify authorities in case of environmental contamination.
Methods for Cleanup: Sweep up spilled material, avoiding dust formation. Shovel residue into suitable labeled waste containers. Wash affected area with water and detergent. Ventilate area.
Disposal: See Disposal Considerations.
Handling: Avoid generation of dust. Do not breathe dust, vapors, or mist. Use only in well-ventilated areas. Prevent contamination with combustible materials.
Storage: Store in tightly closed containers in a cool, dry, well-ventilated area away from heat and sources of ignition. Keep separate from flammable and reducing agents, acids, and combustible substances.
Packaging Materials: Use polyethylene-lined drums, corrosion-resistant containers.
Occupational Exposure Limits: Not established for ammonium zinc nitrite. ACGIH TLV for zinc compounds (as Zn): 2 mg/m³ TWA.
Engineering Controls: Use local exhaust and process enclosure to minimize dust or mist exposure.
Personal Protective Equipment: Safety glasses with side shields or chemical goggles, impervious gloves (nitrile, neoprene), lab coat or chemical-resistant apron, dust mask or respirator (NIOSH-approved). Use face shield for large amounts or spills.
Hygiene Measures: Wash hands and skin after handling. Do not eat, drink, or smoke in work areas. Remove contaminated clothing and wash before reuse.
Appearance: White or off-white crystalline solid
Odor: Slight ammonia odor
Odor Threshold: Not available
pH: 5.5 – 7.0 (10% solution)
Melting Point / Freezing Point: Decomposes above 180°C
Boiling Point: Not applicable
Flash Point: Not flammable
Evaporation Rate: Not applicable
Flammability: Not flammable, but supports combustion of other materials
Vapor Pressure: Negligible at ambient temperature
Vapor Density: Not available
Relative Density: 2.9 – 3.1 g/cm³
Solubility: Soluble in water
Partition Coefficient (log Kow): Not available
Auto-ignition Temperature: Not available
Decomposition Temperature: >180°C
Viscosity: Not applicable
Chemical Stability: Stable under recommended storage conditions.
Conditions to Avoid: Heat, moisture, sources of ignition, contact with incompatible substances.
Incompatible Materials: Strong acids, reducing agents, organic materials, combustible substances.
Hazardous Decomposition Products: Nitrogen oxides, zinc oxides, ammonia.
Hazardous Reactions: May react violently with acids and reducing agents.
Routes of Exposure: Inhalation, ingestion, skin and eye contact.
Acute Toxicity: Harmful if swallowed (oral LD50 >500 mg/kg in rats). Inhalation may cause irritation to mucous membranes.
Skin Corrosion / Irritation: Causes skin irritation on contact.
Serious Eye Damage / Irritation: Causes serious eye irritation.
Respiratory or Skin Sensitization: Not classified as a sensitizer.
Carcinogenicity, Mutagenicity, Reproductive Toxicity: No evidence of carcinogenic, mutagenic, or reproductive effects in available data.
Chronic Effects: Prolonged exposure may affect kidneys and blood.
Aquatic Toxicity: Highly toxic to aquatic organisms, with potential to cause long-term adverse effects in the aquatic environment.
Persistence and Degradability: Inorganic compound, not expected to bioaccumulate. Nitrite ion may persist and affect nitrogen cycle.
Bioaccumulation Potential: Bioaccumulation in aquatic organisms is not expected for zinc nitrite compounds.
Mobility in Soil: Readily soluble in water and may migrate through soil and groundwater.
Other Adverse Effects: Avoid releases to the environment. Inform local authorities if significant spill occurs.
Disposal Methods: Must be disposed of as hazardous chemical waste in accordance with local, regional, and national regulations.
Container Disposal: Empty containers should be triple rinsed before disposal. Dispose of containers in compliance with environmental laws.
Waste Treatment Methods: Do not discharge into sewers, surface water, or soil.
UN Number: 2466
Proper Shipping Name: Ammonium Zinc Nitrite
Transport Hazard Class: 5.1 (Oxidizing substance)
Packing Group: II
Environmental Hazards: Marine pollutant
Special Precautions: Avoid release during transport. Protect from moisture and heat.
TSCA: Listed
REACH: Listed
OSHA Hazards: Oxidizer, irritant
SARA 313: Zinc compounds are subject to reporting requirements
WHMIS Classification: Class C – Oxidizing material; Class D2B – Toxic material
Labeling Requirements: GHS symbols and hazard statements must be present on label.
Other Regulations: Comply with all relevant regional, national, and international regulations for storage, use, and transportation.
