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Product Name: Sodium Cyanoborohydride
Synonyms: Sodium cyanoboro hydride, Sodium cyanotrihydroborate
Chemical Formula: NaBH3CN
CAS Number: 25895-60-7
Recommended Use: Used in chemical synthesis as a reducing agent
Supplier: Multiple laboratory and chemical suppliers globally
Contact Information: Available through distributor’s emergency line, typically US-based number in Safety Data Sheet sections
GHS Classification: Flammable solid (Category 2); Acute toxicity, oral (Category 3); Acute toxicity, dermal (Category 3); Acute toxicity, inhalation (Category 3); Skin corrosion/irritation (Category 1B); Serious eye damage/eye irritation (Category 1)
Signal Word: Danger
Hazard Statements: Highly flammable solid. Toxic if swallowed, in contact with skin, or if inhaled. Causes severe skin burns and eye damage. May cause respiratory irritation.
Precautionary Statements: Wear protective gloves/protective clothing/eye protection/face protection, do not breathe dust or vapors, store away from incompatible materials such as acids and oxidizers.
Pictograms: Flame, Skull and Crossbones, Corrosion
Chemical Name: Sodium cyanoborohydride
Concentration: Greater than 95% active ingredient
Impurities: Minor borate salts possible, sodium borohydride traces, residual cyanide traces (in significant contamination only)
Molecular Weight: 62.84 g/mol
Component Type: Single component substance
Inhalation: Move affected person into fresh air, keep at rest in a position comfortable for breathing, seek immediate medical attention, give oxygen if difficulty breathing occurs
Skin Contact: Remove contaminated clothing immediately, rinse skin with plenty of water for at least 15 minutes, use shower if available, seek medical advice
Eye Contact: Rinse cautiously with water for several minutes, remove contacts if present and easy to do, continue rinsing, get immediate medical help
Ingestion: Do not induce vomiting, rinse mouth, give plenty of water if conscious, never give anything by mouth to unconscious person, obtain urgent medical attention
Most important symptoms/effects: Burning, pain, irritation, drowsiness, respiratory distress, symptoms of cyanide poisoning
Suitable Extinguishing Media: Dry sand, dry chemical powder, carbon dioxide
Unsuitable Extinguishing Media: Water jets, foam, due to violent reaction and hydrogen formation
Specific Hazards: Generates flammable hydrogen gas, releases toxic cyanide and nitrogen oxides when burning
Special Protective Equipment: Full protective suit including self-contained breathing apparatus (SCBA), chemical splash gear
Fire-Fighting Procedures: Keep containers cool with water spray from safe distance, avoid breathing smoke, keep out run-off from entering drains
Personal Precautions: Keep unnecessary personnel away, ventilate area, avoid dust formation, avoid contact with skin and eyes, wear proper protective equipment
Emergency Procedures: Evacuate danger area, restrict access, isolate spillage, remove ignition sources
Environmental Precautions: Prevent infiltration into soil, drains, waterways; notify environmental authorities if substantial quantities escape
Methods for Containment: Collect spill using non-sparking tools, sweep up avoiding dust, place in a dry, sealed, chemically-compatible container
Methods for Cleaning Up: Use absorbent inert material for residues, wash area with water and soda ash, ventilate area well, neutralize if safe
Handling: Operate only inside fume hood or in well-ventilated areas, keep away from sources of ignition, avoid dust generation, transfer using non-sparking tools, avoid contact with acids and water
Storage Conditions: Store in tightly closed containers, cool, dry, well-ventilated place, away from acids, oxidizers, water, and heat, use chemical-resistant shelving
Incompatible Materials: Strong acids, strong oxidizing agents, water, sources of ignition
Storage Temperature Range: 2–8°C preferred for long-term stability
Packaging Materials: Polyethylene containers with screw caps or sealed glass ampoules; never use metal or cardboard
Occupational Exposure Limits: None established for the chemical, but handle as extremely hazardous
Engineering Controls: Chemical fume hood, local exhaust ventilation, explosion-proof equipment, grounded storage
Personal Protective Equipment: Chemical splash goggles, face shield, nitrile or neoprene gloves, lab coat, flame-resistant clothing, chemically-resistant apron, closed-toe shoes, personal respirators for dust or vapor exposure
Hygiene Measures: Do not breathe dust, wash hands thoroughly after handling, remove contaminated clothing before leaving the area, never eat or drink in laboratory
Appearance: White to off-white crystalline powder
Odor: Mild cyano or amine-like
Odor Threshold: Not determined
pH: Alkaline in water, reacts vigorously
Melting Point/Freezing Point: Stable up to approx. 300°C (decomposes, does not truly melt under normal conditions)
Boiling Point: Not applicable
Flash Point: Not applicable (decomposes before boiling)
Evaporation Rate: Not volatile at room temperature
Flammability: Flammable solid
Upper/Lower Flammability Limits: Not determined
Vapor Pressure: Negligible at ambient temperature
Vapor Density: Not determined
Specific Gravity/Density: 1.1–1.3 g/cm³
Solubility: Soluble in water; reacts slowly, liberates hydrogen
Partition coefficient (n-octanol/water): Not applicable
Autoignition Temperature: Not determined
Decomposition Temperature: Above 300°C
Viscosity: Not applicable (solid)
Chemical Stability: Stable under dry, inert, cool storage
Hazardous Reactions: Reacts with acids to generate toxic hydrogen cyanide gas, reacts with water to form hydrogen gas, can ignite if mixed with oxidizers
Incompatible Materials: Water, acids, oxidizing agents, moisture, strong bases
Hazardous Decomposition Products: Hydrogen cyanide, ammonia, nitrogen oxides, sodium compounds
Conditions to Avoid: Elevated temperature, moisture, open flame, source of sparks
Acute Toxicity: Oral LD50 (rat): 15 mg/kg; Dermal LD50 (rabbit): 20 mg/kg (approximate reported values)
Inhalation: Toxic by inhalation, can cause severe respiratory tract irritation and cyanosis
Skin Corrosion/Irritation: Causes severe skin burns, may be toxic through skin contact
Serious Eye Damage/Irritation: Causes eye burns, possible permanent damage
Chronic Effects: Prolonged or repeated exposures may lead to central nervous system damage, chronic cyanide toxicity
Symptoms of Exposure: Headache, dizziness, shortness of breath, cyanosis, loss of consciousness
Carcinogenicity: Not classified as carcinogenic by IARC, NTP, or OSHA
Reproductive Toxicity: No data available
Sensitization: No reliable data for respiratory or skin sensitization
Aquatic Toxicity: Highly toxic to aquatic life, LC50 (fish, 96 h): below 1 mg/L
Persistence and Degradability: Not readily biodegradable, degrades to borates and cyanide ions
Bioaccumulative Potential: Low; does not bioaccumulate, but cyanide breakdown products may persist
Mobility in Soil: Compound is expected to be mobile in soil, especially in moist or acidic conditions
Other Adverse Effects: Discharge to environment may cause acute aquatic poisoning, particular care with laboratory and manufacturing waste streams
Waste Treatment Methods: Must be disposed of as hazardous waste under regulatory oversight, incineration is preferred method after neutralization
Contaminated Packaging: Dispose of containers as hazardous materials, do not reuse empty containers
Special Precautions: Neutralize with sodium hypochlorite under alkaline conditions prior to chemical waste collection where permitted, always consult environmental and safety authorities
Do Not: Allow disposal into ground water, sewers, or waterways without neutralization and regulatory approval
Regulatory Controls: Confirm compliance with all local, regional, and national hazardous waste management regulations
UN Number: UN 2813
UN Proper Shipping Name: Water-reactive solid, toxic, n.o.s. (Sodium Cyanoborohydride)
Transport Hazard Class: 4.3 (Dangerous when wet), 6.1 (Toxic substances)
Packing Group: I (greatest danger)
Labels Required: Toxic, Dangerous When Wet
Environmental Hazards: Marine pollutant
Transportation Precautions: Package in sealed drums with dry inert atmosphere, label as required for high toxicity
U.S. Regulations: TSCA inventory listed; subject to hazardous substance reporting; OSHA process safety requirements
EU Regulations: REACH regulation requires use assessment, Safety Data Sheet under Regulation (EC) 1907/2006
Canadian Regulations: Available on DSL/NDSL, subject to WHMIS controls
Other National Regulations: Covered by chemical control statutes in Asia, South America, Australasia
SARA Title III: Immediate health hazard, fire hazard, reactive hazard listed under Section 311/312; not a Section 313 substance
International Transport: IATA and IMDG code hazardous substance; requires special handling documentation
Safety Assessment: Regular risk assessments strongly advised for workplaces using, storing, or transporting the chemical
