© 2026 Nanjing Finechem Holdings Co., Ltd,
All Right Reserved
Product Name: Ferrous Sulfate Heptahydrate
Chemical Formula: FeSO4·7H2O
Synonyms: Green Vitriol, Iron(II) Sulfate Heptahydrate
CAS Number: 7782-63-0
Recommended Uses: Industrial chemicals, water treatment, nutritional supplement for plants and animals, pigment production, laboratory reagent
Supplier Information: Company details, physical address, emergency phone number, responsible department contact, email address
Classification: Acute Toxicity – Oral (Category 4), Eye Irritation (Category 2A), Skin Irritation (Category 3), Aquatic Hazard (Acute 2, Chronic 3)
GHS Label Elements: Warning symbol (exclamation mark), signal word “Warning”, hazard statements like “Harmful if swallowed”, “Causes eye irritation”, “May cause skin irritation”, “Toxic to aquatic life”
Precautionary Statements: Avoid breathing dust, wash thoroughly after handling, wear protective gloves/eye protection, avoid release to environment, keep out of reach of children
Hazards Not Otherwise Classified: Iron salts may aggravate ulcers or hemochromatosis, dust may irritate respiratory tract, possible gastrointestinal distress from ingestion
Name: Ferrous Sulfate Heptahydrate
Content: 98-100% by weight
CAS Number: 7782-63-0
Impurities: Trace amounts of other sulfates (magnesium sulfate, manganese sulfate), water as crystal hydration, no other hazardous impurities present at reportable levels
Inhalation: Move individual to fresh air, keep comfortable for breathing, seek medical attention if symptoms persist such as coughing or difficulty breathing
Skin Contact: Remove contaminated clothing, rinse skin with plenty of water for at least 15 minutes, wash thoroughly with soap, seek medical advice for persistent irritation or burns
Eye Contact: Flush eyes gently with water for several minutes, holding eyelids apart, remove contact lenses if present, continue rinsing and obtain medical attention if irritation develops
Ingestion: Rinse mouth but do not induce vomiting, get immediate medical attention, give water if conscious, never give anything by mouth to an unconscious person, symptoms may include abdominal pain, vomiting, or diarrhea
General Advice: Medical personnel should be aware of potential for iron poisoning, monitor vital signs and administer supportive therapies as necessary
Suitable Extinguishing Media: Use water spray, dry chemical, foam, or carbon dioxide, select method appropriate for surrounding material
Specific Hazards: Product itself does not burn but may decompose upon heating releasing toxic and irritating gases such as sulfur oxides and iron oxides
Firefighter Protection: Wear full protective gear and self-contained breathing apparatus to avoid inhalation of thermal decomposition products
Further Information: Prevent contaminated firefighting water from entering drains or watercourses, ensure containers are cooled with water if exposed to fire
Personal Precautions: Wear appropriate protective equipment such as gloves, goggles, and dust mask, avoid creating or inhaling dust, keep unprotected people away
Environmental Precautions: Prevent further leakage or spillage if safe to do so, prevent entry into sewers, surface water, or soil
Containment Methods: Scoop or sweep spilled material into containers for recycling or disposal, clean area with plenty of water, ventilate site
Decontamination: Wash affected surfaces with water to remove residue, dispose according to local, regional, national, and international regulations
Handling: Avoid contact with skin, eyes, and clothing, use only in well-ventilated areas, don’t breathe dust, wear ergonomic PPE, keep containers tightly closed when not in use
Storage Conditions: Store in cool, dry, well-ventilated area, protect from moisture and light, keep away from strong bases, oxidizing materials, and combustible substances
Special Packaging: Use corrosion-resistant materials for containers and shelves, label all storage vessels, store away from food and feed, limit exposure to air to reduce oxidation and caking
Exposure Limits: No specific OSHA PEL; ACGIH TLV for soluble iron salts: 1 mg/m³ (as Fe) TWA
Engineering Controls: Use local exhaust ventilation to control airborne dust, install eyewash stations and safety showers in work areas
Personal Protective Equipment: Protective gloves (nitrile or rubber), chemical safety goggles or full-face shield, lab coat or long-sleeved clothing, dust-respirator in dusty conditions (NIOSH-approved)
Hygiene Measures: Wash hands before eating, drinking, or smoking, avoid bringing contaminated clothing into personal spaces, wash clothing before reuse
Appearance: Pale green crystalline solid
Odor: Odorless
Melting Point: 64°C (decomposes on further heating)
Boiling Point: Not applicable (decomposes before boiling)
Solubility in Water: 44 g/100 ml at 20°C
Specific Gravity: 1.9 (water = 1)
pH (5% solution): 2.5-4.0
Vapor Pressure: Negligible at room temperature
Flash Point: Not flammable
Partition Coefficient: No data available
Chemical Stability: Stable under normal conditions, loses water and oxidizes on exposure to air, forming brown ferric compounds
Reactivity: Reacts with strong bases, strong oxidizers, and reducing agents, contact with moist air increases oxidation
Hazardous Decomposition Products: Sulfur oxides, iron oxides, release of corrosive vapors possible at high temperature
Conditions to Avoid: High humidity, direct sunlight, incompatible materials that promote oxidation, extreme heat
Routes of Exposure: Inhalation, ingestion, skin and eye contact
Acute Effects: May cause gastrointestinal discomfort, nausea, vomiting, diarrhea if swallowed, eye and skin irritation, respiratory irritation in sensitive individuals
Chronic Effects: Prolonged or repeated exposure can cause iron overload, hemosiderosis, tissue damage, anemia in animals; aggravates pre-existing conditions like ulcers
Toxicity Data: Oral LD50 (rat): ~1,520 mg/kg; symptoms at high doses can involve cardiovascular shock, metabolic acidosis, liver or kidney failure in severe cases
Carcinogenicity: Not listed by IARC, NTP, OSHA as carcinogenic
Sensitization: Not a known sensitizer
Ecotoxicity: Toxic to aquatic organisms, may cause long-term adverse effects in aquatic environments, high concentrations disrupt ecosystem balance
Persistence and Degradability: Dissolves and dissociates into iron and sulfate ions, iron precipitates over time under neutral/alkaline conditions
Bioaccumulation: Iron shows limited bioaccumulation due to tight homeostasis in biota, excess can disrupt species with limited ability to regulate iron uptake
Mobility in Soil: High solubility, migrates easily in moist soils, precipitation possible in higher pH soils
Other Adverse Effects: Acidification potential for water bodies, interference with aquatic plant photosynthesis, careful disposal advised
Waste Treatment Methods: Dispose of according to local, state, and federal regulations, consult with hazardous waste management authority if uncertain
Product Disposal: Small quantities may be diluted and flushed with water, larger amounts require collection by licensed waste disposal contractor
Contaminated Packaging: Rinse containers before disposal, recycle if possible, ensure containers are not reused for food/feed storage
Special Precautions: Avoid uncontrolled releases, never discharge into drains or watercourses, record and label all waste disposals
UN Number: Not regulated as dangerous goods for transport under most international rules
Proper Shipping Name: Ferrous Sulfate Heptahydrate, not classified as hazardous for transport
Transport Hazard Classes: Not applicable
Packing Group: Not applicable
Environmental Hazards: Not a marine pollutant but minimize exposure to aquatic systems
Special Precautions for Transport: Avoid spillage, use secure, sealed containers, store away from strong oxidizing substances
OSHA Status: Regulated under OSHA standard for hazardous chemicals
TSCA Inventory: Listed
REACH: Registered under European Union chemical safety rules
SARA 313: Not listed as a toxic release chemical
California Proposition 65: Not listed as a chemical known to cause cancer, birth defects, or other reproductive harm
Labeling Requirements: GHS-compliant hazard statements, precautionary and disposal information on all packaging and shipping containers
Other Regulations: Follow all applicable workplace safety, transport, and environmental laws concerning handling, storage, and disposal
