© 2026 Alchemist Worldwide Ltd,
All Right Reserved
Product Name: Ferrous Sulfate Heptahydrate
Chemical Formula: FeSO₄·7H₂O
Synonyms: Iron(II) sulfate heptahydrate, Green vitriol, Copperas
CAS Number: 7782-63-0
Intended Use: Used as fertilizer, in water treatment, pigment manufacture, nutraceuticals, and in laboratory chemistry
Supplier Identification: Name, address, and emergency contact numbers for the supplier or manufacturer
Emergency Telephone Number: Local poison control center, supplier/emergency services number
Classification: Eye irritation (Category 2), Skin irritation (Category 2), Acute oral toxicity (Category 4), Environmental hazard (Aquatic Acute 1)
Signal Word: Warning
Hazard Statements: Harmful if swallowed, causes eye and skin irritation, dangerous to aquatic life
Pictograms: Exclamation mark, Environment
Precautionary Statements: Avoid breathing dust, use only outdoors or in well-ventilated area, wash thoroughly after handling, wear protective gloves/eye/face protection, avoid release to environment
Routes of Exposure: Inhalation, ingestion, dermal, ocular
Symptoms: Nausea, vomiting, diarrhea, stomach pain, skin redness, eye pain or injury
Chemical Name: Ferrous Sulfate Heptahydrate
CAS Number: 7782-63-0
Concentration: 100% pure or as specified by product label
Impurities: Extremely low if technical grade, trace heavy metals at ppm level for pharmaceutical or analytical grades
Molecular Weight: 278.01 g/mol
Other Components: Water of crystallization (seven water molecules), no intentionally added hazardous ingredients
Inhalation: Move affected person to fresh air, keep at rest, provide oxygen if breathing is difficult, consult a physician
Skin Contact: Immediately remove contaminated clothing, flush skin with large amounts of water for at least 15 minutes, seek medical attention for persistent irritation
Eye Contact: Rinse cautiously with water for several minutes, remove contact lenses if present and easy to do, continue rinsing, get medical help if pain or redness persists
Ingestion: Rinse mouth, do not induce vomiting, drink one or two glasses of water if conscious and alert, seek immediate medical attention
Most Important Symptoms: Gastrointestinal distress, irritation of eyes, skin, and respiratory tract
Immediate Medical Attention Required: For large exposures or in case of persistent symptoms
Suitable Extinguishing Media: Use water spray, foam, dry chemical, or carbon dioxide (CO₂), do not use water jet directly on product
Specific Hazards: Non-flammable—decomposes above 680°C to release toxic sulfur oxides and iron oxides
Special Protective Equipment: Firefighters wear self-contained breathing apparatus and full protective gear
Fire/Explosion Hazards: Not combustible, but irritating and corrosive gases may form
Thermal Decomposition Products: Sulfur dioxide, iron oxides
Advice for Firefighters: Stay upwind, avoid breathing vapors, use standard firefighting procedures, control runoff to prevent environmental contamination
Personal Precautions: Use proper personal protective equipment, avoid dust formation, ventilate area
Environmental Precautions: Prevent entry into sewers, drains, waterways, or soil, report large spills to local authorities
Methods for Cleanup: Collect spilled material using non-sparking tools, scoop up carefully, place in suitable container for disposal, vacuum the last traces, avoid generating dust, wash spill area with water after collection
Protective Measures: Wear gloves, goggles, and dust mask or respirator
Disposal: Dispose of according to local, regional, and national regulations, avoid direct discharge into environment
Precautions for Safe Handling: Handle in well-ventilated areas, avoid breathing dust, avoid contact with skin and eyes, do not eat, drink, or smoke during use, wash hands after handling
Storage Conditions: Store in tightly closed original container, keep in cool, dry, well-ventilated space, store away from incompatible materials such as oxidizers and alkalis
Incompatibilities: Strong oxidizers, alkalis, exposure to moisture or humid air increases caking and decomposition risk
Advice on Mixed Storage: Separate from food, feeds, and chemicals classified as strong bases or oxidizers
Special Storage Requirements: Protect from moisture and direct sunlight, label all containers clearly
Exposure Limits: OSHA PEL for iron salts: 1 mg/m³ (as iron), ACGIH TLV: 1 mg/m³ (as iron fumes/dust)
Engineering Controls: Local exhaust ventilation, general room ventilation, mechanical exhaust where dust or mist is generated
Personal Protective Equipment:
Appearance: Pale green to bluish-green crystals
Odor: Odorless
pH (5% solution): 2–4
Melting Point: Loses water at 56°C (dehydrates), decomposes above 680°C
Boiling Point: Not applicable (decomposes before boiling)
Solubility: Soluble in water (26 g/100 ml at 20°C), insoluble in alcohol
Density: 1.897 g/cm³
Vapor Pressure: Negligible at standard conditions
Partition Coefficient: Not available
Evaporation Rate: Not applicable
Flash Point: Not flammable
Auto-ignition Temperature: Not applicable
Explosive Properties: Not explosive
Oxidizing Properties: Not oxidizing
Chemical Stability: Stable under recommended storage and handling conditions, hydrolyses slowly in humid air
Conditions to Avoid: Heat, moisture, contact with incompatible materials
Incompatible Materials: Strong oxidizers, alkalis, reducing agents
Hazardous Decomposition Products: Releases sulfur oxides, iron oxides on decomposition
Possibility of Hazardous Reactions: Reacts with alkalis and strong oxidants producing toxic gases
Polymerization: Will not occur
Acute Toxicity: LD₅₀ (oral rat): 319 mg/kg (as FeSO₄)
Routes of Exposure: Ingestion, inhalation, skin, and eye contact
Symptoms of Exposure: Irritation of mucous membranes, allergic sensitization, nausea, vomiting, diarrhea, abdominal pain
Chronic Effects: Possible iron overload with long-term high exposure, liver or kidney damage in severe cases
Carcinogenicity: Not listed as a carcinogen by IARC, NTP, or OSHA
Mutagenicity: No evidence of genetic damage, based on available data
Reproductive Toxicity: No significant evidence in humans or animal studies
Toxicity to Aquatic Organisms: Very toxic to freshwater organisms at high concentrations, LC₅₀ (Daphnia magna): < 1 mg/l (as Fe²⁺)
Persistence and Degradability: Dissolves easily in water, not persistent
Bioaccumulative Potential: Bioaccumulation unlikely, quickly metabolized by organisms
Mobility: High mobility in water, can reach groundwater if spilled on soil
Environmental Effects: Alters water pH and can cause iron precipitation affecting aquatic life
Other Adverse Effects: Iron ions contribute to eutrophication of water bodies in some cases
Waste Treatment Methods: Collect, package, and label for authorized chemical waste disposal
Disposal of Contaminated Packaging: Rinse thoroughly before discarding, follow local and national environmental regulations
Precautions: Avoid release into sewers, waterways, or soil, do not mix with incompatible wastes
Recommended Disposal: Use licensed hazardous waste disposal contractor, incinerate or landfill according to regional and national codes
Special Instructions: Keep away from food, water sources, and animal feed during storage and disposal
UN Number: Not regulated (varies by region and packaging quantity)
Proper Shipping Name: Ferrous Sulfate Heptahydrate
Transport Hazard Class: Non-hazardous for ground, limited hazard for bulk maritime/air shipment
Packing Group: Not regulated
Environmental Hazards: Dangerous to aquatic environment in large quantities
Special Transport Precautions: Avoid moisture or contamination during transport, use secure containers, label clearly
Regulatory Notes: Comply with IMDG, IATA, ADR, DOT, as per consignment route
OSHA: Listed as hazardous due to acute toxicity and potential for irritation
EPA: Listed on TSCA inventory, SARA 302: Not listed, SARA 313: Not listed
EINECS/ELINCS: Listed (EINECS 231-753-5)
WHMIS (Canada): D2B - Toxic material causing other toxic effects
REACH (EU): Registered, subject to annual tonnage reporting and safe handling requirements
California Proposition 65: Not listed
Labeling Requirements: Appropriate hazard and precautionary labeling, including pictograms and emergency information
International Inventories: Found on most major chemical inventories including AICS, DSL, ENCS, IECSC, PICCS, NZIoC, TSCA
