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1. Basic information
Chemical formula: C6H12N2
Molecular weight: 112.17 (or 112.18, slightly different depending on the calculation method and accuracy)
CAS registration number: 280-57-9
EINECS number: 205-999-9
2. Physical properties
Appearance: white or light yellow crystals, easy to deliquesce, easy to sublime at room temperature.
Melting point: about 156~159°C (literature values may vary slightly)
Boiling point: 174°C
Density: 1.02 g/mL (under specific conditions)
Vapor pressure: 2.9 mm Hg (at 50°C)
Refractive index: n20/D 1.4634 (lit.)
Flash point: 198°F (or 98°C, slightly different depending on the test method)
Solubility: easily soluble in water, acetone, benzene and ethanol, soluble in straight-chain hydrocarbons such as pentane, hexane and heptane.
III. Chemical properties
Alkalinity: weakly alkaline, can absorb CO2 in the air and turn yellow.
Stability: stable, but highly hygroscopic, incompatible with strong oxidants and strong acids.
Flammability: highly flammable, with an autoignition temperature of 350°C.
4. Uses
Catalyst: Triethylenediamine is an important chemical raw material, widely used as a catalyst for polyurethane foam, elastomers and plastic products, and an accelerator for epoxy resin curing. In addition, it is also an ethylene polymerization catalyst, acrylonitrile polymerization catalyst.
Other uses: as an initiator in pesticide synthesis and as an additive in cyanide-free electroplating. At the same time, its derivatives can also be used as corrosion inhibitors, emulsifiers, etc.
5. Preparation or source
Dichloroethane ammonolysis method: a co-product in the preparation of ethylenediamine.
Piperazine ammonolysis method: TEDA is prepared using piperazine and its derivatives, with a high product yield, a mature process, and has been industrialized.
Other methods: also include ammonolysis methods using N-hydroxyethylpiperazine, N-aminoethylpiperazine, N,N dihydroxyethylpiperazine as raw materials, and ammonolysis methods using diethanolamine.
VI. Toxicity and safety
Toxicity: Rabbit oral LD50 is 700~1100mg/kg, rat oral LD50 is 1700mg/kg (values in different literature may vary slightly).
Safety terms: including keeping away from fire, immediately flushing with plenty of water and seeking medical advice after accidental contact with eyes, keeping in a cool place, wearing appropriate gloves and goggles or masks, etc.
Risk terms: including highly flammable, harmful if swallowed, irritating to eyes and skin, serious damage to eyes, and harmful to aquatic life, etc.
VII. Storage and transportation
Storage conditions: should be stored in a dry place, never heated, and should not be stored and transported with acidic substances.
Packaging: iron barrels lined with meat paper bags and plastic bags are commonly used for packaging.
| Melting point | 156-159 °C(lit.) |
| Boiling point | 174 °C |
| density | 1.02 g/mL |
| vapor pressure | 2.9 mm Hg ( 50 °C) |
| refractive index | n20/D 1.4634(lit.) |
| Fp | 198 °F |
| storage temp. | Store below +30°C. |
| solubility | 400g/l |
| form | Hygroscopic Crystals |
| pka | 3.0, 8.7(at 25ºC) |
| color | White to pale yellow |
| Water Solubility | 46 g/100 mL (26 ºC) |
| Sensitive | Hygroscopic |
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