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Chemical Name: Ammonium Hydrogen Carbonate
Common Names: Ammonium Bicarbonate
CAS Number: 1066-33-7
Recommended Uses: Leavening agent in baking, blowing agent in plastics, fire extinguisher component, pH regulator, buffer
Company Identification: Manufacturer’s name, address, emergency phone number, and business phone
Classification: Not considered hazardous under normal use; may cause irritation
GHS Label Elements: Signal word – Warning
Hazard Statements: May cause skin, eye, and respiratory tract irritation. May be harmful if swallowed in large amounts.
Precautionary Statements: Avoid dust formation. Use proper ventilation. Do not breathe dust.
Other Hazards: Decomposes to ammonia and carbon dioxide; hazardous fumes may accumulate in enclosed spaces.
Substance: Ammonium Hydrogen Carbonate
Chemical Formula: NH4HCO3
Synonyms: Baking ammonia, hartshorn
Concentration: 99-100%
Impurities: Usually contains trace water and negligible impurities
Inhalation: Move individual to fresh air. Seek medical attention if symptoms persist. Provide oxygen if breathing is difficult.
Eye Contact: Rinse cautiously with water for at least 15 minutes. Remove contact lenses if present and easy to do. Seek medical attention.
Skin Contact: Wash gently with plenty of soap and water. Remove contaminated clothing.
Ingestion: Rinse mouth with water. Do not induce vomiting. Seek medical attention if large quantities consumed or symptoms develop.
Symptoms and Effects: Irritation, coughing, shortness of breath, skin redness, stomach discomfort
Suitable Extinguishing Methods: Use water spray, foam, carbon dioxide, or dry chemical extinguishers.
Unsuitable Methods: None specifically noted.
Specific Hazards: Decomposition yields toxic ammonia gas and carbon dioxide. Dust can form explosive mixtures with air.
Protective Equipment: Wear self-contained breathing apparatus and full protective gear to prevent skin and eye contact.
Special Procedures: Evacuate area. Ensure proper ventilation.
Personal Precautions: Put on gloves, eye protection, and dust masks if heavy exposure expected.
Emergency Procedures: Restrict access to spill area. Provide ventilation.
Environmental Precautions: Prevent large quantities from entering drains or waterways.
Method for Cleaning Up: Sweep up with minimal dust creation. Collect in suitable container for reuse or disposal. Rinse spill area.
Handling: Use in well-ventilated areas. Reduce dust release by handling in closed systems or with local exhaust. Do not mix with acids or strong bases.
Storage: Store in a cool, dry, well-ventilated place away from heat, moisture, acids, and incompatible materials. Use tightly closed containers. Keep away from direct sunlight.
Container Requirements: Use corrosion-resistant materials; avoid use of metal containers sensitive to ammonium salts.
Occupational Exposure Limits: No established specific threshold limit value; minimize airborne exposure.
Engineering Controls: Use local exhaust or general ventilation.
Personal Protection: Safety glasses or goggles for eye protection, gloves to prevent skin contact, protective clothing for heavy exposure, dust masks or respirators where dust levels are high.
Hygiene Measures: Wash hands after handling. Do not eat, drink, or smoke near material.
Appearance: White crystalline powder or granules
Odor: Faint ammonia smell
pH: Aqueous solution is mildly alkaline
Melting Point/Freezing Point: Decomposes above 36–60°C
Boiling Point: Decomposes before boiling
Flash Point: Not flammable
Evaporation Rate: Not applicable
Vapor Pressure: Very low
Solubility: 22g/100ml in water (at 25°C), insoluble in alcohol
Relative Density: 1.59 (water = 1)
Partition Coefficient n-octanol/water: Not applicable
Auto-ignition Temperature: Not self-igniting
Decomposition Temperature: Begins at about 36°C, releasing ammonia and carbon dioxide gases
Chemical Stability: Stable in cool, dry, ventilated spaces; decomposes in heat, moisture, or acid conditions
Reactivity: Reacts with acids to release carbon dioxide, with bases to produce ammonia
Conditions to Avoid: High temperature, moisture, strong acids, strong bases
Incompatible Materials: Acids, strong bases, oxidizers
Hazardous Decomposition Products: Ammonia, carbon dioxide
Acute Toxicity: Low acute oral and dermal toxicity; large doses can cause gastrointestinal upset
Skin Irritation: Mild irritant to some people
Eye Irritation: Causes moderate irritation on contact
Inhalation: Dusts may cause coughing or shortness of breath, especially for those sensitive to ammonia
Chronic Effects: No known chronic hazards from low-level exposure
Carcinogenicity: Not identified as carcinogenic by IARC, NTP, OSHA
Aquatic Toxicity: Low toxicity to aquatic organisms; excess release may raise ammonium levels in water, affecting sensitive species
Persistence/Degradability: Rapidly degrades in the environment to non-persistent products
Bioaccumulation: Unlikely due to chemical breakdown
Mobility in Soil: Soluble, but dissipates quickly via volatilization and biodegradation
Other Adverse Effects: Large spills can upset aquatic balance in confined waterways
Waste Disposal Methods: Small quantities can be flushed with large amounts of water if allowed locally. Larger amounts should be sent to approved disposal facilities.
Container Disposal: Rinse empty containers with water before recycling or disposal.
Regulatory Requirements: Dispose of in accordance with local, state, and national regulations.
UN Number: Not regulated as dangerous goods
Proper Shipping Name: Ammonium Hydrogen Carbonate
Hazard Class: Not classified as hazardous
Packing Group: Not applicable
Environmental Hazards: Not known to be hazardous to environment in transport
Special Transport Precautions: Protect from moisture and high temperatures during transport
TSCA Listing: Listed on the US Toxic Substances Control Act Inventory
OSHA Status: Not regulated as hazardous
EU Regulations: Exempt from classification as a dangerous substance
SARA Title III: Not a listed hazardous chemical
WHMIS Classification (Canada): Not considered hazardous
Other Regulations: Meets food-grade standards for certain uses; consult local authorities for additional requirements
West Ujimqin Banner, Xilingol League, Inner Mongolia, China
