© 2026 Sinochem Nanjing Corporation,
All Right Reserved
Name: Fluorosulfuric Acid Chemical Formula: HSO3F Other Names: Sulfuric acid, fluoro- Appearance: Clear, colorless to pale yellow fuming liquid with a sharp, pungent odor Common Uses: Often used as a catalyst, strong acid in synthetic chemistry, or fluorinating agent CAS Number: 7789-21-1
Hazard Class: Corrosive, highly toxic Health Risk: Causes severe burns to skin, eyes, and mucous membranes; inhalation may cause life-threatening respiratory injuries Environmental Hazard: Dangerous to aquatic life, causes long-term adverse effects in the environment Symbol: Corrosive, Toxic Main Dangers: Rapid tissue destruction on contact, fuming may release toxic vapors
Component: Fluorosulfuric Acid Concentration: Typically 100% Impurities: Water and sulfuric acid traces possible Physical State: Liquid
Inhalation: Move person to fresh air right away, keep warm and at rest, seek urgent medical attention as respiratory tissue can swell rapidly Skin Contact: Remove contaminated clothing, flush skin immediately and continuously with plenty of water, seek emergency treatment for burns Eye Contact: Rinse cautiously with water for at least 15 minutes, hold eyelids apart, get medical attention without delay Ingestion: Do not induce vomiting, rinse mouth if possible, give nothing by mouth if unconscious, get to emergency care fast
Extinguishing Media: Use dry chemical, foam, or carbon dioxide; do not use water as uncontrolled contact makes things worse Hazardous Combustion Products: Emits toxic fluoride and sulfur oxides Personal Precautions: Firefighters need full protective gear, including acid-resistant suit and self-contained breathing apparatus Fire Behavior: Non-combustible but attacks most organic—releases dangerous gas clouds under heat or water contact
Personal Protection: Secure the area, evacuate non-essential people, ventilate space, use acid-resistant PPE Spill Handling: Absorb with inert, dry material (like lime or soda ash), don’t use sand or organic material at risk of reaction Disposal of Contaminated Material: Gather residues in a suitable, labeled acid-resistant container Environmental Precaution: Don’t let it enter drains, soil, or waterways
Storage: Store in tightly closed containers made of materials like Teflon, kept in a cool, well-ventilated acid cupboard Handling: Only experienced personnel should work with it, avoid all skin contact, wear full-face protection and acid-resistant clothing Conditions to Avoid: Heat, moisture, incompatible materials such as organic compounds, strong bases, or water
Engineering Controls: Work in a chemical fume hood, use good exhaust systems Personal Protection: Wear chemical splash goggles, full-face shield, heavy acid-resistant gloves, boots, rubber/PVC apron, and a positive pressure respirator for bulk handling Hygiene Measures: Wash hands and face thoroughly after use, remove and wash contaminated clothing immediately
Appearance: Clear to pale yellow, fuming liquid Odor: Pungent, irritating Boiling Point: About 165°C Melting Point: -89°C Density: Roughly 1.75 g/cm³ Solubility: Reacts violently with water, makes toxic vapors Vapor Pressure: Moderate at room temperature
Chemical Stability: Highly reactive, especially with water and bases Conditions to Avoid: Moisture, excessive heat, storage with incompatible materials Incompatible Materials: Water, alcohols, amines, most organics, strong bases, metal powders Hazardous Decomposition Products: Hydrogen fluoride, sulfur oxides
Acute Effects: Severe burns and rapid tissue destruction on contact or inhalation, potentially fatal pulmonary edema Chronic Exposure: Persistent skin or respiratory damage, scarring, risk of secondary infection Routes of Exposure: Inhalation, ingestion, skin and eye contact Carcinogenicity: Not classified, but the corrosive action causes indirect health complications
Toxicity: Very toxic to aquatic life, causes extensive local damage to ecosystems Persistence and Degradability: Rapidly reacts with moisture forming strong acids, stays active in aquatic environments until neutralized Bioaccumulation: Unlikely, reacts too fast with natural materials
Waste Methods: Take to specialized hazardous waste facility, do not pour down drains, never dilute with water outside controlled neutralization Container Disposal: Rinse containers with neutralizing agent before final disposal, follow local hazardous waste guidelines
Proper Shipping Name: Fluorosulfuric acid Hazard Identification: Toxic and corrosive, handle only in secure, tightly sealed acid-resistant containers Transport Precautions: Leak-proof packaging, vehicles labeled for toxic/corrosive cargo, handlers trained in spill and emergency procedures
Labeling Requirements: Clearly marked as corrosive and toxic Restrictions: Strictly regulated for transport, use, and disposal due to severe health and environmental risks Workplace Regulation: Exposed employees need extensive hazard training, access to emergency showers and eyewash stations
