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Product Name: Niobium Pentachloride
Chemical Formula: NbCl5
CAS Number: 10026-12-7
Synonyms: Niobium(V) chloride
Recommended Uses: Used in organic synthesis, catalysts, and materials science research
Supplier Details: Manufacturer and distributor information should be confirmed through local supply chain contacts
Emergency Contact: Emergency response services—Refer to poison control and chemical response centers for assistance in case of incident
Hazard Class: Corrosive, irritant, environmental hazard
Signal Word: Danger
Pictograms: Corrosive, Environmental, Health hazard
Hazard Statements: Causes severe skin burns and eye damage; harmful if inhaled or swallowed; toxic to aquatic life
Precautionary Notes: Avoid release into the environment; do not breathe dust or fumes; wear suitable protective equipment
Chemical Name: Niobium Pentachloride
Purity: >98% by weight
Impurities: Small traces of tantalum chloride may be present in some batches
Molecular Weight: 270.17 g/mol
Physical State: Yellow crystalline solid, sharply fuming in moist air
Inhalation: Move person into fresh air at once; provide artificial respiration if not breathing; seek medical advice immediately
Skin Contact: Remove contaminated clothing; wash the affected area thoroughly with soap and water for at least 15 minutes; seek immediate medical attention for burns or persistent irritation
Eye Contact: Immediately flush with plenty of water for at least 15 minutes, lifting eyelids occasionally; obtain urgent medical assessment
Ingestion: Rinse mouth; do not induce vomiting; never give anything by mouth to an unconscious person; seek medical intervention at once
Note for Physicians: Supportive care; treat symptoms and maintain airway, circulation, and breathing; monitor for delayed pulmonary effects
Suitable Extinguishing Media: Use dry chemical, CO2, or compatible foam; water may increase risk of hazardous fumes
Unsuitable Media: Water and moisture create violent reaction
Specific Hazards: Releases corrosive hydrogen chloride gas and niobium oxides when decomposing under fire conditions; may produce chlorine-containing gases
Protective Equipment: Self-contained breathing apparatus and full protective suit recommended
Special Guidance: Evacuate surrounding area promptly; use non-combustible barriers if possible; avoid inhalation of fumes
Personal Protection: Wear chemical-resistant gloves, goggles, and protective clothing; ensure adequate ventilation
Evacuation Procedures: Remove all non-essential personnel from spill zone
Containment: Avoid release to environment; prevent runoff to drains and surface waters
Clean-Up Methods: Collect material using inert absorbents such as dry sand; transfer waste using non-metallic tools to sealed containers; do not wash with water
Decontamination: Rinse contaminated tools and surfaces with appropriate solvent after collecting solid matter
Handling: Always work in a fume hood or well-ventilated area; avoid creating dust and do not breathe fumes; use tools designed for corrosive chemical handling
Storage: Store in airtight, moisture-proof containers away from water, bases, and organic materials; keep in cool, dry, ventilated area
Incompatibilities: Water, alcohols, strong bases, strong oxidizing and reducing agents
Special Precautions: Respect strict labelling and segregate from food and personal items; check containers regularly for leaks or powder build-up
Engineering Controls: Use local exhaust and general room ventilation to control airborne concentrations; employ gloveboxes for weighing and transfer
Respiratory Protection: Approved respirator for dust/fume protection when concentration may reach occupational limits
Eye Protection: Tightly fitting safety goggles or full-face shield
Skin Protection: Chemical-resistant gloves (nitrile, neoprene), long-sleeved clothing, lab coat
Hygiene Measures: Wash hands and face thoroughly after handling; remove contaminated clothing before entering eating or resting areas
Occupational Exposure Limits: No established limit for niobium pentachloride; minimize exposure by best industrial hygiene practices
Appearance: Pale yellow to bright yellow crystalline solid
Odor: Sharp, pungent; fumes irritate mucous membranes
Melting Point: 203°C
Boiling Point: 248°C (decomposes above this temperature)
Density: Approximately 2.75 g/cm3
Solubility: Reacts violently with water; soluble in chlorinated solvents such as chloroform
Vapor Pressure: Sublimes readily at room temperature, especially in humid conditions
Partition Coefficient (n-octanol/water): Not available due to reactivity
pH: Not applicable (reacts with water)
Flash Point: Not flammable in standard tests
Chemical Stability: Stable only in sealed, moisture-free conditions
Reactivity: Hydrolyzes rapidly with water, generating hydrogen chloride fumes and heat; reacts with alcohols, amines, and other nucleophiles
Hazardous Decomposition Products: Hydrogen chloride gas, niobium oxides, chlorine gas
Conditions to Avoid: High humidity, water, open flames, contact with organic material or acids/bases
Polymerization: Not known to occur
Acute Toxicity: Harmful by inhalation, ingestion, and skin absorption; detailed LD50 not available
Skin/Eye Corrosion: Causes severe burns and permanent eye damage
Chronic Effects: Prolonged or repeated exposures may cause dermatitis, upper respiratory irritation, and sensitization
Inhalation Risks: May result in pulmonary edema or bronchial irritation
Ingestion Risks: Can trigger burns to mouth, esophagus, stomach; risk of systemic toxicity
Sensitization: May trigger allergic reactions after repeated exposure
Carcinogenicity: Not classified as carcinogenic by IARC, NTP, OSHA
Mutagenicity/Teratogenicity: Data limited; caution advised for pregnant workers
Eco-toxicity: Toxic to aquatic life; risk of lasting adverse effects in aquatic environments
Aquatic Mobility: Readily hydrolyzes and forms persistent compounds in water
Persistence/Degradability: Inorganic chemical; does not biodegrade, but hydrolyzed forms may persist
Bioaccumulation: Bioaccumulation potential considered low due to reactivity, but hydrolysis products could concentrate in sediments
Other Environmental Risks: Spills may acidify local soils and water, damaging plant and animal life
Waste Handling: Collect and label all residues as hazardous waste; avoid disposal to drains or normal municipal waste
Disposal Methods: Use specialized chemical waste contractors; neutralize using carefully controlled protocols that address corrosivity and reactivity
Packaging: Use HDPE or glass containers with appropriate chemical-resistant seals
Regulatory Compliance: Follow local, regional, and national regulations for hazardous chemical waste
Environmental Warnings: Prevent leaching or contact with surface and groundwater
UN Number: 2728
UN Proper Shipping Name: Niobium Pentachloride
Transport Hazard Class: 8 (Corrosive)
Packing Group: II
Labels: Corrosive pictogram
Special Transport Precautions: Protect from heat, moisture, and physical damage; secure containers upright in secondary containment
Land Transport (ADR/RID): Regulated as dangerous goods
Sea Transport (IMDG): Requires IMDG-compliant packaging and declarations
Air Transport (IATA): Refer to IATA guidelines for handling corrosive solids; limited quantities only
Labeling: Corrosive; see relevant pictograms, hazard statements, risk and safety phrases
Global Inventory Status: Listed on EINECS, TSCA, and many international registers
OSHA: Subject to Hazard Communication Standard; SDS required for workplace availability
SARA Title III: Not specifically listed; may be reportable as hazardous due to properties
REACH Registration: Restrictions may apply in EU jurisdictions; check current regulatory status
Other Compliance Notes: Consult national and regional safety legislation for workplace exposure and PPE requirements; SDS should be updated regularly to reflect changes in hazard classification or handling standards
