Dimethylamine Solution Aq. ( N-Methylmethanamine : (Dimethyl)amine : (CH3)2NH ) 40% - 5000ml

Dimethylamine Solution, 40% Aqueous
Other Names: N-Methylmethanamine, (Dimethyl)amine
Chemical Formula: (CH₃)₂NH
Molar Mass: 45.08 g/mol
CAS Number: 124-40-3
Appearance: Colorless to yellowish aqueous solution with a strong, fishy, ammoniacal odor

Dimethylamine is a secondary aliphatic amine commonly encountered as a 40% aqueous solution. It is a volatile, flammable base used in various industrial applications including chemical synthesis, rubber processing, and water treatment. The aqueous solution is strongly alkaline and emits irritating vapors.

Chemical and Physical Properties

• Density: ~0.89 g/mL (at 25 °C)

• Boiling Point (40% solution): ~51 °C

• Melting Point: ~−37 °C

• Solubility in Water: Miscible

• Solubility in Organic Solvents: Soluble in alcohol and most organic solvents

• Vapor Pressure: ~212 mmHg (at 20 °C)

• Flash Point: ~−18 °C (closed cup)

• Autoignition Temperature: ~400 °C

• Explosive Limits: 2.8% (LEL) – 14.4% (UEL)

• pH: Strongly alkaline (1% solution)

Applications

Chemical Manufacturing:

• Used in the synthesis of agrochemicals, solvents, and specialty chemicals

Water Treatment:

• Precursor for flocculants and other conditioning agents

Rubber Industry:

• Intermediate for rubber-processing accelerators and additives

Coatings and Inks:

• Involved in resin and pigment formulations

Photographic and Electronic Chemicals:

• Applied in the production of image-processing agents and etchants

Safety

Signal Word: Danger

Hazard Statements:

• H225: Highly flammable liquid and vapor

• H302+H332: Harmful if swallowed or if inhaled

• H314: Causes severe skin burns and eye damage

• H335: May cause respiratory irritation

• H412: Harmful to aquatic life with long-lasting effects

Precautionary Statements:

• P210: Keep away from heat, sparks, open flames, and hot surfaces. No smoking

• P260: Do not breathe vapors or mists

• P280: Wear protective gloves, clothing, and eye/face protection

• P303+P361+P353: IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse skin with water or shower

• P305+P351+P338+P310: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing. Immediately call a POISON CENTER or doctor

• P403+P233: Store in a well-ventilated place. Keep container tightly closed

First Aid Measures

Inhalation: Remove person to fresh air. Provide oxygen if breathing is difficult. Seek medical attention.
Skin Contact: Wash with plenty of soap and water. Remove contaminated clothing. Seek medical attention if irritation develops.
Eye Contact: Rinse with water for at least 15 minutes. Remove contact lenses if applicable. Seek immediate medical help.
Ingestion: Rinse mouth. Do not induce vomiting. Seek medical advice immediately.

Handling and Storage

• Store in a tightly closed, grounded container in a cool, dry, and well-ventilated area

• Keep away from heat sources, ignition sources, and incompatible materials (acids, oxidizers)

• Use only non-sparking tools and explosion-proof equipment

• Ensure local ventilation to avoid vapor buildup

Environmental Considerations

Dimethylamine is harmful to aquatic life. Prevent release into water systems. Dispose of waste and residues in accordance with local environmental regulations.