Chemical Name: Monomethylamine
Chemical Formula: CH3NH2
Form: Typically encountered as either a compressed gas or aqueous solution.
CAS Number: 74-89-5
Synonyms: Methylamine, Methanamine
Odor: Ammonia-like, strong and noticeable even in low concentrations
Appearance: Colorless gas or clear, colorless solution for industrial supply
Major Industrial Applications: Coloring agents, pharmaceuticals, pesticide intermediates, water treatment, and surfactant production often start with monomethylamine for amination needs.
Hazard Classification: Flammable gas, corrosive when concentrated, toxic by inhalation and ingestion
Main Hazards: Direct exposure can lead to chemical burns in eyes and on skin, inhaled vapors may damage respiratory system and mucous membranes, combustible risk occurs readily due to low flash point
Target Organs: Respiratory tract, skin, eyes
Potential Chronic Effects: Repeated exposure aggravates skin and respiratory system, sensitization is uncommon but can occur after regular industrial handling.
Signal Word: Danger (as established by the Globally Harmonized System)
Monomethylamine Concentration: Typically supplied as anhydrous (about 100%) or as a solution in water at concentrations ranging from 33% up to 40%
Other Constituents: Water (for aqueous preparations only)
Impurities: Trace amines might develop during storage if the product undergoes partial decomposition.
Purity: Over 99% in most technical-grade batches manufactured under controlled conditions.
Inhalation: Move affected personnel to fresh air, keep them calm, provide oxygen for severe respiratory symptoms, seek medical evaluation for persistent effects
Skin Contact: Remove contaminated clothing, wash thoroughly with water and mild soap for minimum 15 minutes, pay close attention to skin folds and fingernails
Eye Contact: Rinse immediately with water or saline for at least 15 minutes while holding eyelids open, medical assistance recommended without delay
Ingestion: Rinse mouth, do not induce vomiting, seek urgent medical attention
Special Note: Safe handling experience strongly reinforces the importance of on-site eyewash stations and safety showers, especially for packing and blending teams.
Suitable Extinguishing Media: Dry chemical, carbon dioxide, alcohol-resistant foam
Unsuitable Media: Water jets can spread spillage and increase vapor-release risk
Hazardous Combustion Products: Carbon monoxide, carbon dioxide, nitrogen oxides may be released
Protective Equipment: Firefighters must use self-contained breathing apparatus and complete protective gear
Special Precautions: Cylinders or containers exposed to fire may rupture violently; secure prompt cooling with water spray from a safe distance.
Personal Precautions: Evacuate unprotected personnel, ventilate affected area, isolate all ignition sources
Spill Containment: Absorb solution spills with inert materials like sand or vermiculite, stop gas release at source if safe
Cleanup: Wear chemical-resistant gloves, goggles, and protective clothing, collect residues in compatible containers for safe disposal
Environmental Precaution: Prevent entry into drains, waterways, or soil assistance, and post warning signage until cleanup completes.
Industry Practice: Trained staff handle most releases; regular drills help reinforce correct emergency response.
Safe Handling: Work in chemical fume hoods, ensure local exhaust at handling points, keep away from ignition sources
Container Recommendations: Only use pressure-rated cylinders or HDPE drums equipped with secure, corrosion-resistant fittings
Storage Conditions: Store in cool, dry, well-ventilated spaces, maintain temperature controls below 30°C to minimize vapor pressure and escape
Segregation: Keep separate from acids, oxidizing agents, halogens, and strong reducing substances
Operational Insight: Custom-designed storage tanks and cylinder cages designed in our facility receive monthly inspection for leaks and pressure integrity.
Occupational Exposure Limits: TWA (Time-Weighted Average) set by OSHA or ACGIH is usually 5 ppm
Engineering Controls: Automated ventilation systems, gas detection alarms, regular recalibration of sensors
Personal Protective Equipment: Splash-proof goggles, chemical-resistant gloves (nitrile, neoprene), flame-resistant lab coats, and cartridge respirators for short tasks, supplied-air respirators for emergency work
Workplace Hygiene: Regular replacement of filters and gloves after major operations or visible contamination triggers
Worker Education: Training covers not only proper equipment usage but also symptom recognition and buddy-system reinforcement.
Physical State: Gas at ambient temperature, available as aqueous solutions
Boiling Point: 6.8°C
Melting Point: -93.5°C
Flash Point: -11°C (closed cup)
Vapor Pressure: Elevated at room temperature, which increases escape risk from storage
Solubility: Soluble in water and alcohols, generating basic and exothermic solutions
Odor Threshold: Less than 1 ppm, making it easily detectable by experienced staff before reaching exposure limits
Density: Aqueous solutions are lighter than water, pure gas lighter than air.
Chemical Stability: Stable under recommended storage, decomposes slowly in presence of acids or strong oxidizers
Conditions to Avoid: Heat, sparks, open flame, direct sunlight
Incompatible Materials: Acids, acid chlorides, oxidizing agents, copper, and alloys accelerate hazardous reactions
Hazardous Decomposition: Can yield ammonia, nitrogen oxides, carbon monoxide during fire or high-heat incidents
Operational Control: Storage and handling areas use non-sparking tools and explosion-proof equipment as standard mitigation strategy.
Routes of Exposure: Inhalation, skin, eyes, ingestion
Acute Effects: Mucosal irritation, coughing, shortness of breath, headache, risk of pulmonary edema at high exposure
Skin and Eye Effects: Burns, redness, severe tears, permanent corneal damage at high contact
Long-Term Exposure: May result in chronic bronchitis or dermatitis in sensitive workers
Experience in Plant: Regular monitoring and proactive medical checkups catch early symptoms and allow workplace adjustments.
Aquatic Toxicity: Toxic to aquatic life, especially fish and invertebrates at high concentrations
Mobility: Highly mobile in soil and water, rapid evaporation from exposed surfaces
Persistence and Degradability: Breaks down in environment through biodegradation and atmospheric reaction, but can cause damage before dilution
Bioaccumulation Potential: Low, yet persistent emissions may disrupt wastewater treatment balance if not managed
Spill Practice: Secondary containment and effluent monitoring feature in all large-scale use points.
Waste Treatment: Neutralize aqueous wastes with mineral acids under controlled conditions, vent gases to scrubbers using alkaline solutions
Container Disposal: Decontaminate and puncture gas cylinders before recycling, dispose of solid wastes through licensed chemical waste contractors
Regulatory Compliance: All disposal arranged in accordance with local, regional, and national chemical waste guidelines
On-Site Note: Waste logs maintained for traceability ensure traceability and accountability throughout the supply chain.
UN Number: 1061 for gas
Packing Group: II for moderate danger
Label Requirements: Flammable Gas, Toxic
Transport Precautions: Secure upright cylinders, maintain cool temperature, segregate from incompatibles
Operational Practice: Bulk shipments coincide with route risk assessments and driver hazard training.
Classification: Controlled under various national and international chemical safety standards, including workplace exposure and transport regulations
Reporting Requirements: Threshold reporting as hazardous substance according to chemical inventory laws
Relevant Acts: Restricted entry in chemical control legislation, subject to fire codes and workplace hazard disclosure responsibilities
Plant Perspective: Regulatory audits and site inspection readiness remain integral to compliance culture throughout production, storage, and shipping operations.
