© 2026 Sinochem Nanjing Corporation,
All Right Reserved
Product Name: Iron Hydroxyoxide
Chemical Formula: FeO(OH) or Fe(OH)3
Other Names: Ferric oxide hydroxide, hydrated iron oxide
Recommended Use: Pigment, catalyst, water treatment media, laboratory reagent
Supplier: Chemical supply companies, pigment manufacturers, research labs
Contact Information: Emergency phone numbers for chemical emergencies, supplier’s regular business line
CAS Number: 20344-49-4
Synonyms: Goethite, Limonite (naturally occurring forms), Iron(III) hydroxide
Hazard Class: Not classified as hazardous under GHS
Routes of Exposure: Inhalation, ingestion, eye and skin contact
Potential Health Effects: Can cause mild respiratory tract irritation if inhaled as fine dust, may cause slight eye or skin irritation on direct and prolonged contact
Chronic Exposure: No significant chronic toxicity observed under normal handling conditions
Physical Hazards: No significant risk of fire or explosion
Environmental Hazards: Not expected to be dangerous to the environment in average use and accidental release situations
Pictogram: None required
Signal Word: None required
Chemical Name: Iron Hydroxyoxide
Common Formulations: FeO(OH) pure or with traces of other iron compounds
Purity: Typically above 95% FeO(OH) by mass
Impurities: Small quantities of silica, alumina, manganese oxides may be present, depending on source
Main Component: 100% Iron Hydroxyoxide by weight, no significant contaminants when of reagent or technical grade
Inhalation: Move exposed person to fresh air, seek medical attention if cough, shortness of breath, or persistent discomfort occurs
Skin Contact: Wash with soap and water, remove contaminated clothing, rinse skin thoroughly
Eye Contact: Rinse cautiously with water for several minutes, remove contact lenses if present and easy to do, continue rinsing until irritation subsides
Ingestion: Rinse mouth, drink water to dilute, avoid swallowing further, seek medical advice if symptoms develop or large quantity ingested
Additional Medical Advice: Treat symptomatically, no delayed effects known from low-level exposure
Suitable Extinguishing Media: Water spray, foam, dry chemical, or CO2
Fire Hazards: Not combustible, no abnormal risk of fire from this material
Explosion Hazards: Minimal risk, product dust will not explode under normal circumstances
Special Protective Equipment for Firefighters: Standard protective equipment, wear self-contained breathing apparatus if exposure to product decomposition or smoke is possible
Hazardous Combustion Products: Can yield metal oxides if involved in fire with other combustible materials
Personal Precautions: Avoid creating dust, wear protective clothing, gloves, safety goggles, dust mask if necessary
Environmental Precautions: Keep spillage away from watercourses and drains if possible
Containment: Collect spillage using methods that minimize dust, vacuum or wet sweeping recommended
Clean-Up Procedures: Transfer to suitable container for disposal, wash spill area with water after complete removal
Special Safety Precautions: Wear respiratory protection if dust becomes airborne during clean-up
Handling: Use with adequate ventilation, avoid breathing dust, avoid contact with eyes, wash hands after handling
Storage: Keep in tightly closed containers, store in cool, dry, well-ventilated place, protect from moisture, store away from acids and reducing agents
Storage Materials: Store in containers made of materials not susceptible to rust or chemical attack due to iron content
Specific Use Instructions: Minimize dust generation, use proper hygiene practices to prevent accidental ingestion or skin absorption
Occupational Exposure Limits: OSHA PEL for nuisance dust (15 mg/m3 total dust, 5 mg/m3 respirable fraction), ACGIH recommends similar limits
Engineering Controls: Local exhaust ventilation, general ventilation to minimize airborne concentrations
Personal Protective Equipment: Protective gloves, safety goggles, long-sleeve lab coat, dust mask or NIOSH-approved respirator for dusty conditions
Hygiene Measures: Wash hands and face after handling, do not eat, drink, or smoke in areas of use
Environmental Controls: Prevent spillage into drains or water systems
Appearance: Yellow, brown, or red powder, odourless
Molecular Weight: Approximately 88.85 g/mol (for FeO(OH))
Melting Point: Decomposes before melting, converts to Fe2O3 on strong heating
Boiling Point: Not applicable (solids do not boil)
Solubility: Practically insoluble in water, soluble in strong acids
pH: Neutral to slightly alkaline in water suspension
Vapour Pressure: Not applicable (non-volatile)
Specific Gravity: 3.4–4.0
Flash Point: Not flammable
Odour Threshold: Not applicable
Other: Not reactive with most common materials, except strong acids/reducing agents
Chemical Stability: Stable under normal use and storage
Reactivity: Reacts with strong acids to release heat and soluble iron salts
Hazardous Reactions: Reaction with reducing agents may generate hydrogen gas
Conditions to Avoid: Excessive heat, contact with strong acids or reducers
Incompatible Materials: Strong acids, strong reducing agents
Hazardous Decomposition Products: Iron oxides, possibly hydrogen gas if reduced
Acute Toxicity: Low, not expected to produce acute health effects from low-level exposure
Inhalation: Short-term dust inhalation may cause mild nose/throat irritation
Skin Contact: May cause dryness or mild irritation on prolonged exposure
Eye Contact: Dust can cause slight redness, short-term eye irritation
Ingestion: Not toxic in small amounts; excessive ingestion can lead to discomfort and iron overload in rare cases
Chronic Exposure: Occupational studies show little evidence of chronic systemic effects
Carcinogenicity: Not listed by NTP, IARC, or OSHA as a carcinogen
Mutagenicity/Teratogenicity: No evidence found
Sensitization: No known sensitizing effects
Toxicity: Not toxic to aquatic or terrestrial life in standard use
Persistence and Degradability: Stable in the environment, slowly converted to other iron forms, not biodegradable
Bioaccumulation: Not expected due to low solubility and natural presence in soil and water
Mobility in Soil: Immobile, binds tightly to soil particles, rarely leaches
Other Information: Derived from minerals common in soil, may contribute to iron levels in natural waters without marked toxicity
Waste Disposal Methods: Dispose of as non-hazardous solid waste unless mixed with hazardous substances
Disposal Containers: Use sealable, clearly labelled containers; prevent dust escape
Regulatory Status: Not a listed hazardous waste under RCRA, but local regulations may vary
Reuse and Recycling: Can be reused in some industrial applications depending on purity
Precaution: Avoid disposal into water systems or open environment to prevent contamination and dust issues
UN Number: Not regulated
Shipping Name: Iron Hydroxyoxide
Hazard Class: Non-hazardous
Packing Group: Not assigned
Environmental Hazards: Not a marine pollutant
Transport Precautions: Ship in sealed containers to avoid spillage or dust formation
Special Transport Requirements: No specific restrictions, comply with general transport good practice
Labeling Requirements: Not classified as hazardous, standard workplace labeling applies
OSHA: Not regulated as a hazardous chemical
TSCA: Listed substance
REACH: Registered in the EU
Other National Inventories: Present in main countries’ chemical inventories
Workplace Restrictions: Industrial hygiene standards for dust exposure apply
Other Regulations: Not subject to specific international, local, or state restrictions outside common workplace safety rules
