© 2026 Sinochem Nanjing Corporation,
All Right Reserved
Product Name: Pentaborane
Chemical Formula: B5H9
CAS Number: 19624-22-7
Common Synonyms: Boron hydride, boron pentahydride
Recommended Use: High-energy rocket fuel additive, special organic synthesis
Supplier Identification: Contact information and emergency number available on shipment packaging and invoice
Manufacturer: Typically supplied under strict federal regulations by certified chemical manufacturers
Classification: Extremely flammable liquid and vapor; toxic by inhalation, ingestion, and skin contact; corrosive to skin, eyes, and respiratory system
Signal Word: Danger
Hazard Statements: Causes severe burns, highly flammable, may cause fatal lung damage if inhaled, causes organ damage
Pictograms: Flame, skull and crossbones, corrosion
Health Hazards: Acute toxicity, organ toxicity, respiratory distress, risk of delayed lung injury
Environmental Hazards: Likely to bioaccumulate, highly toxic to aquatic life
Precautionary Statements: Avoid all contact, keep away from ignition sources, use only with proper PPE and ventilation
Chemical Name: Pentaborane
Concentration: > 99%
Impurities: May include trace boranes or hydrogen
Stabilizing Additives: None present
Formula: B5H9
Molecular Weight: 63.13 g/mol
Inhalation: Move affected person to fresh air immediately, keep person warm and at rest, deliver oxygen if breathing is difficult, seek emergency medical attention
Ingestion: Do not induce vomiting, rinse mouth thoroughly, seek immediate medical help as pentaborane can rapidly enter bloodstream
Skin Contact: Remove contaminated clothing, flush skin with plenty of water for at least 15 minutes, seek urgent medical care
Eye Contact: Rinse cautiously with water for several minutes, remove contact lenses if present, continue rinsing, seek medical aid
General Advice: Medical professionals should monitor victim for pulmonary edema and systemic toxicity, specialized treatment may be required
Suitable Extinguishing Media: Dry powder for metal fires, sand; water can increase hazard and should not come in contact
Unsuitable Media: Water, foam—reacts violently, risk of explosion
Special Hazards: Vapors significantly heavier than air, may ignite at distances from source, decomposes to produce hydrogen and boron oxides
Protective Equipment: Full firefighting turnout gear, self-contained breathing apparatus
Additional Advice: Move containers away from fire if safe, stay upwind, do not allow fire run-off into drains, control ignition sources
Personal Precautions: Evacuate area, eliminate all ignition sources, ventilate enclosed spaces, use explosion-proof equipment
Protective Equipment: Full-face respirator, chemical-resistant clothing, gloves (Viton, butyl rubber), anti-static boots
Environmental Precautions: Prevent release to environment, keep out of drains, surface waters, and soil
Spill Cleanup: Absorb spills using dry sand or earth, collect with non-sparking tools, secure in chemical waste drums, never use water
Emergency Response: Trained HAZMAT teams only, enforce cordon, post hazard warning signs
Handling: Use only in chemical fume hood or explosion-proof glovebox, avoid any contact or vapor inhalation, ground all equipment, avoid static discharge
Storage Conditions: Store in airtight, stainless steel or nickel alloy containers, under inert gas (e.g., nitrogen or argon), exclude moisture
Incompatible Materials: Oxidizers, water, halogens, acids—risk of rapid decomposition and explosion
Containers: Keep tightly sealed, labeled, third-party certified corrosion-resistant vessels only
Additional Precautions: Regular leak and integrity checks, clearly label area as flammable and highly toxic, restrict access to trained personnel
Engineering Controls: Chemical fume hood with remote exhaust, spark-proof electricals, continuous gas detection, closed-system handling
Occupational Exposure Limits: No established OSHA, ACGIH or NIOSH exposure limits; recommended: minimum feasible exposure
Personal Protective Equipment: Positive-pressure self-contained breathing apparatus, chemically impervious suit, face shield, gloves, boots
Hygiene Measures: Wash hands and face thoroughly before breaks and after work, immediately remove contaminated clothing, provide emergency showers
Appearance: Colorless to yellow liquid
Odor: Repulsive, garlic-like
Melting Point: -48°C
Boiling Point: 60.6°C at 1 atm
Flash Point: -26°C (closed cup)
Flammability: Extremely flammable—ignites spontaneously in air
Vapor Pressure: 213 mmHg at 25°C
Density: 0.622 g/cm³ at 20°C
Solubility: Insoluble in water; miscible with most organic solvents
Autoignition Temperature: Below room temperature
Explosive Limits: 1.3–7.5% in air
Decomposition Products: Boron oxides, hydrogen gas, toxic fumes
Chemical Stability: Unstable, especially above ambient temperatures
Reactivity: Fiercely reacts with oxygen, water, oxidizers and halogens
Conditions to Avoid: Heat, sunlight, sparks, moisture, strong acids and oxidizers
Hazardous Decomposition: Hydrogen gas, boron oxides, irritating and toxic fumes
Polymerization: Not known to polymerize but decomposes violently under certain conditions
Routes of Exposure: Inhalation, ingestion, skin contact, eye contact
Acute Effects: Headache, dizziness, respiratory irritation, pulmonary edema, convulsions, coma
Chronic Effects: Liver and kidney damage, central nervous system impairment, possible neurotoxicity
LD50 (Oral, rat): 15 mg/kg (highly toxic)
LC50 (Inhalation, rat, 4 hr): 1 ppm
Delayed Effects: May cause delayed injury to lungs or nervous system
Sensitization: Not established, but all exposure should be strictly avoided
Carcinogenicity: Not listed by IARC, NTP, or OSHA as human carcinogen
Aquatic Toxicity: Highly toxic, even at low concentrations
Persistence: Degrades slowly in environment, forms boron oxides and hydrogen gas
Bioaccumulation: Potential for bioaccumulation in soil and water
Mobility: Likely to vaporize from soil and water; risk of atmospheric transport
Soil Impact: Can inhibit plant growth, soil microbe function
Degradability: Limited by reactivity and volatility, not readily biodegradable
Method of Disposal: Incinerate in licensed chemical incinerator with after-burner and scrubber by trained professionals only
Container Disposal: Triple rinse with inert solvent under inert gas, puncture and recycle or dispose at licensed hazardous waste facility
Precautions: Never dispose into drains or natural environment, consult local, state, federal regulations
Special Instructions: All disposals must be documented and handled by authorized hazardous waste contractors
UN Number: UN 1380
Proper Shipping Name: Pentaborane
Transport Hazard Class: 4.2 (Pyrophoric liquid), 6.1 (Toxic substance)
Packing Group: I
Labeling Requirements: Flammable Liquid, Toxic, Pyrophoric
Additional Transport Information: Must be shipped in DOT-authorized containers with full hazard placarding, handled only by trained personnel under strict security
U.S. TSCA Status: Listed, subject to significant restrictions
EPA: Extremely hazardous substance under EPCRA 302, strict reporting required
OSHA: Covered by OSHA hazardous chemical regulations, safety training mandatory
DOT: Regulated as a hazardous material—pyrophoric, toxic; full manifest, placarding required
International: Subject to IATA, IMDG codes; export tightly controlled; consult national regulatory authorities before handling or shipping
Special Restrictions: Any handling, storage, disposal, or transport must be documented and limited to certified, licensed professionals
