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Common Name: Monomethylamine Hydrochloride
Chemical Formula: CH5N·HCl
Physical Form: White to off-white crystalline solid
Odor: Strong, fish-like
Uses: Intermediate in pharmaceuticals, dyes, and resins
Solubility: Highly soluble in water
Molecular Weight: 67.52 g/mol
Acute Health Effects: Irritation to eyes, skin, and respiratory tract
Exposure Risks: Inhalation can trigger coughing, sore throat; skin contact stings
Chronic Exposure: Prolonged contact risks dermatitis, possible asthma-like symptoms
Environmental Impact: Toxic to aquatic life; can shift water pH, affect local ecosystems
Fire Risk: Decomposes at high temps, releasing toxic gases like hydrogen chloride and nitrogen oxides
Chemical Name: Monomethylamine Hydrochloride
Chemical Family: Amine salt
CAS Number: 593-51-1
Concentration: 100% pure compound in most applications
Eyes: Hold eyelids open, rinse gently with water for 10–20 minutes; seek medical attention for redness or pain
Skin: Wash immediately with plenty of water and soap; remove contaminated clothing; obtain medical advice if irritation persists
Inhalation: Move to fresh air; monitor for breathing difficulty; seek medical care if coughing or throat irritation continues
Ingestion: Rinse mouth; do not induce vomiting; get prompt medical help if feeling unwell or symptoms appear
Suitable Extinguishing Media: Use water spray, dry chemical, foam, or carbon dioxide
Special Hazards: Heating releases irritating or toxic gases
Protective Gear: Firefighters rely on full protective suit and self-contained breathing apparatus
Additional Info: Keep unnecessary personnel away; cool exposed containers with water
Personal Precautions: Use gloves, goggles, and masks to avoid skin and inhalation contact
Environmental Precautions: Prevent chemical from entering drains or water sources
Containment: Collect spills in sealable, labeled containers; ventilate area
Cleanup: Wipe solid dust meticulously using damp cloth or absorbent material; dispose waste properly as hazardous
Handling: Wear adequate protection; avoid creating and breathing dust; work under fume hood when possible
Storage: Keep tightly sealed in cool, dry, well-ventilated place away from acids, oxidizers, and moisture
Incompatible Materials: Avoid contact with strong oxidizers and acids; risk of violent reaction or hazardous gas
Best Practices: Label containers clearly; restrict access to trained personnel only
Engineering Controls: Local exhaust ventilation to reduce airborne dust or vapor
Personal Protection: Chemical-resistant gloves, safety goggles, protective lab coats
Respiratory Protection: If likely to exceed exposure limits, use properly fitted respirators
Exposure Limits: No mandatory workplace exposure limit in many jurisdictions but aim for lowest practical exposure
Appearance: Solid, crystalline, white or off-white
Odor: Distinctly amine-like
Melting Point: Begins melting near 231 °C
Boiling Point: Decomposes before boiling
Vapor Pressure: Very low at room temperature
Density: About 0.97 g/cm³
Solubility: Dissolves readily in water, forming a clear, basic solution
pH of Solution: Expected to be strongly basic
Chemical Stability: Stable under recommended storage conditions
Conditions to Avoid: Heat, moisture, sources of ignition
Incompatible Materials: Strong acids, oxidizers, and moisture
Hazardous Decomposition Products: Methylamine, hydrogen chloride, various oxides of nitrogen
Routes of Exposure: Inhalation, ingestion, skin, and eye contact
Acute Toxicity: Can cause burns and severe irritation
Delayed Effects: Extended exposure irritates eyes, airways, and skin
Symptoms of Overexposure: Dizziness, tight chest, watery eyes, persistent cough
Long-Term Effects: Risk of chronic dermatitis, potential airway sensitization after repeated exposure
Carcinogenicity: Not listed as a carcinogen by IARC, OSHA, or NTP
Aquatic Toxicity: Harmful to fish and aquatic invertebrates at low concentrations
Soil Mobility: Highly soluble, leaches rapidly; can harm microorganisms
Persistence: Not persistent, breaks down in the environment with exposure to light and soil microbes
Bioaccumulation: Unlikely due to high solubility; risk lies in acute toxicity to flora and fauna
Safe Disposal: Treat as hazardous chemical waste; must never be poured down the drain
Preferred Method: Incineration in approved facility or recovery by licensed chemical disposal firm
Regulation: Dispose according to local, state, and national laws; consult environmental authorities for guidance
Contaminated Packaging: Rinse carefully and label for hazardous waste pick-up; avoid re-use
Proper Shipping Name: Monomethylamine Hydrochloride, solid
Packing Group: Based on hazard class and quantity
Hazard Class: Classified as irritant or corrosive by various authorities
Handling Instructions: Secure upright in sealed containers, separate from foodstuffs and incompatible chemicals
Workplace Control: Obligated to keep exposures as low as possible under occupational health guidance
Labeling: Signal words like “Warning” or “Danger” may appear based on jurisdiction
Restrictions: Some regulations require special storage arrangements and regular environmental checks
Record Keeping: Maintain up-to-date logs of usage, storage, and disposal; ensure Safety Data Sheets are accessible
