Diethylamine
Diethylamine (CAS: 109-89-7) is a volatile, flammable secondary amine with the molecular formula (C2H5)2NH and a molecular weight of 73.14 g/mol. It is a clear, colourless liquid with a strong ammoniacal odour. Diethylamine is miscible with water and a wide range of organic solvents. It serves as a crucial building block in organic synthesis and is widely employed as a corrosion inhibitor and in the production of rubber chemicals.
- Synonyms
- Diethylamine

Organic Synthesis Intermediate
Diethylamine is a versatile reagent used in the synthesis of pharmaceuticals, pesticides, dyes, and other fine chemicals. It is frequently used in nucleophilic substitution reactions and as a base in various organic transformations.
Corrosion Inhibitor
Its alkaline nature makes diethylamine effective in preventing corrosion in various industrial systems, particularly in boiler water treatment and as a component in metalworking fluids.
Rubber Chemicals
It functions as an accelerator in the vulcanization process of rubber, contributing to improved elasticity and durability of rubber products.
Solvent
Diethylamine can be used as a polar solvent in specific chemical reactions, owing to its miscibility with both water and many organic solvents.
| Molecular weight | 73.14 |
|---|---|
| Linear formula | (C2H5)2NH |
| Assay | ≥99.0% (GC) |
| Boiling point | 55 °C(lit.) |
| Density | 0.707 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.385(lit.) |
| Solubility | H2O: soluble1 M at 20 °C, clear, colorless |
| Melting point | −50 °C(lit.) |
| Vapour pressure | 14.14 psi (55 °C)180 mmHg (20 °C)3.51 psi (20 °C) |
| Vapour density | 2.5 (vs air) |
| Autoignition temp | 594 °F |
| Impurities tested | <0.0005% Phosphorus (P) |



Hazard statements
- H225Highly flammable liquid and vapour
- H302Harmful if swallowed
- H312Harmful in contact with skin
- H314Causes severe skin burns and eye damage
- H332Harmful if inhaled
Precautionary statements
- P210Keep away from heat, sparks and open flames. No smoking
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Faceshields, full-face respirator (US), Gloves, Goggles, multi-purpose combination respirator cartridge (US) |
|---|---|
| Flash point | -23 °C / -9.4 °F |
| Transport (UN / ADR) | UN 1154 3(8) / PGII |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | F,C |
| Risk statements (R) | 11-20/21/22-35 |
| Safety statements (S) | 3-16-26-29-36/37/39-45 |
| Cation traces | Al: Ca: Cu: Fe: K: Mg: NH4+: Na: Pb: Zn: <0.0005% |
| Anion traces | chloride (Cl-): sulfate (SO42-): <0.05% |
| Ignition residue | <0.1% |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Diethylamine (CAS: 109-89-7) used for?
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Diethylamine (CAS: 109-89-7) is primarily used as an intermediate in organic synthesis for pharmaceuticals, pesticides, and dyes, as well as a corrosion inhibitor and in the production of rubber chemicals.
What is the CAS number and chemical formula for Diethylamine?
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The CAS number for Diethylamine is 109-89-7 and its linear formula is (C2H5)2NH.
What grade and purity does Tech Serve Solutions supply for Diethylamine?
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Tech Serve Solutions supplies Diethylamine with an assay of ≥99.0% (GC). We do not represent this product as USP, BP, or EP grade unless explicitly stated.
How should Diethylamine be handled safely?
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Diethylamine is a highly flammable liquid and vapour, it is corrosive, and harmful if swallowed, inhaled, or in contact with skin. Handle with extreme caution in a well-ventilated area, using appropriate personal protective equipment including gloves, eye protection, and respiratory protection. Refer to the Safety Data Sheet for detailed handling procedures.
Is Diethylamine a controlled substance?
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Data not available regarding controlled substance status. Please consult local regulations.
How is Diethylamine packed and shipped?
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Diethylamine is packed according to industry standards for hazardous materials. As a global supplier and exporter, Tech Serve Solutions ensures compliant shipping procedures.
How can I request a quote or sample of Diethylamine?
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To request a quote or sample of Diethylamine, please contact our sales team through the website or by phone.
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