PMDT
Pentamethyldiethylenetriamine
CAS: 3030-47-5
Molecular Formula: C9H23N3
PMDT - Names and Identifiers
| Name | Pentamethyldiethylenetriamine |
| Synonyms | PMDT PMDTA PMDETA PM-DETA PENTAMETHYLDIETHYLENETRIAMINE Pentamethyldiethylenetriamine Pentamethyl diethylenetriamine N-Pentamethyl Diethylene Triamine 2,5,8-trimethyl-2,5,8-triazanonane Bis(2-dimethylaminoethyl)methylamine N,N,N-Tris(3-dimethylaminopropyl)Amine 1,1,4,7,7-pentamethyl-diethylenetriamin 1,1,4,7,7-Pentamethyldiethylenetriamine- N,N,N',N',N''-Pentamethyldiethylenetriamine N,N,N',N',N''-pentamethyldiethylenetriamine N,N,N',N',N''-PENTAMETHYLDIETHYLENETRIAMINE N,N,N',N'',N''-pentamethyldiethylenetriamine N,N,N',N'',N''-Pentamethyldiethylenetriamine N,N,N',N'',N''-PENTAMETHYLDIETHYLENETRIAMINE N,N,N,N,-pentamethyldiethylenetriamine (Am-1) PMDETA N~1~,N~1~,N~5~,N~5~-tetramethylpentane-1,3,5-triamine N~3~-(2-aminoethyl)-N~2~,N~2~,2-trimethylbutane-2,3-diamine N-[2-(dimethylamino)ethyl]-N,N',N'-trimethylethane-1,2-diamine n-[2-(dimethylamino)ethyl]-n,n',n'-trimethyl-1,2-ethanediamine 2-Ethanediamine,N-[2-(dimethylamino)ethyl]-N,N',N'-trimethyl-1 N-[2-(dimethylammonio)ethyl]-N,N',N'-trimethylethane-1,2-diaminium |
| CAS | 3030-47-5 |
| EINECS | 221-201-1 |
| InChI | InChI=1/C9H23N3/c1-11(2)7-5-9(10)6-8-12(3)4/h9H,5-8,10H2,1-4H3 |
| InChIKey | UKODFQOELJFMII-UHFFFAOYSA-N |
PMDT - Physico-chemical Properties
| Molecular Formula | C9H23N3 |
| Molar Mass | 173.3 |
| Density | 0.83g/mLat 25°C(lit.) |
| Melting Point | −20°C(lit.) |
| Boling Point | 198°C(lit.) |
| Flash Point | 128°F |
| Water Solubility | Miscible in water. |
| Vapor Presure | 0.23 mm Hg ( 20 °C) |
| Appearance | Powder |
| Color | White |
| BRN | 1741396 |
| pKa | 8.84±0.38(Predicted) |
| PH | 11.9 (100g/l, H2O, 20℃) |
| Storage Condition | Store below +30°C. |
| Stability | Stable. Flammable. Incompatible with strong oxidizing agents, strong acids. |
| Sensitive | Air Sensitive |
| Explosive Limit | 1.1-5.7%(V) |
| Refractive Index | n20/D 1.442(lit.) |
| Physical and Chemical Properties | Density: 0.827 Melting Point: -20°C Boiling Point: 198°C refractive index: 1.442 flash point: 69°C |
| Use | As a highly efficient catalyst for polyurethane flexible foam |
PMDT - Risk and Safety
| Hazard Symbols | T - Toxic |
| Risk Codes | R22 - Harmful if swallowed R24 - Toxic in contact with skin R34 - Causes burns R10 - Flammable |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) |
| UN IDs | UN 2734 8/PG 2 |
| WGK Germany | 2 |
| RTECS | IE2100000 |
| FLUKA BRAND F CODES | 10-34 |
| TSCA | Yes |
| HS Code | 29212900 |
| Hazard Class | 8 |
| Packing Group | II |
| Toxicity | LD50 orally in Rabbit: 1330 mg/kg LD50 dermal Rabbit 230 mg/kg |
PMDT - Nature
Open Data Verified Data
This product is colorless or yellowish transparent liquid, slightly amine odor, soluble in water, alcohol and ether and other organic solvents, can absorb moisture and carbon dioxide in the air.
Last Update：2024-01-02 23:10:35
PMDT - Preparation Method
Open Data Verified Data
There are two production routes currently used.
- is obtained from the reaction of diethylenetriamine with formaldehyde and formic acid, and the general yield is about 70%.
- prepared from diethylenetriamine and formaldehyde in the presence of catalyst and hydrogen, the yield can reach more than 95%.
Last Update：2022-01-01 11:08:41
PMDT - Use
Open Data Verified Data
This product is an efficient catalyst for the reaction of polyurethane formation, and has strong selectivity for the reaction of isocyanate with water. It is characterized by small amount and high catalytic activity, and can be used as the main catalyst of soft polyurethane foam and the auxiliary catalyst of semi-rigid and rigid polyurethane foam. In addition, it can also be used as a catalyst for the polymerization of olefin oxide, phase transfer and metal complexes. The compound form of this product, commonly known as AM-I, of which the content of pentamethyldiethylenetriamine is 70%± 1%. Its characteristic is to improve the tolerance of the formula processing, improve the foaming process performance and product quality.
Last Update：2022-01-01 11:08:42
PMDT - Safety
Open Data Verified Data
slightly toxic. For skin contact, rinse with tap water. Packed in a clean galvanized iron drum with a net weight of 15 0kg per barrel. It shall be stored in a dry and ventilated warehouse below 40 ℃, and shall not be stacked in the open air.
Last Update：2022-01-01 11:08:42
PMDT - Reference Information
Open Data Unverified Data
| freezing point | <-70 ℃ |
| LogP | -2.1 at 25℃ |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| introduction | pentamethyldiethylenetriamine is colorless to light yellow transparent liquid, easily soluble in water, is a highly active catalyst for polyurethane reaction, mainly catalyzes foaming reaction, is also used to balance overall foaming and gel reaction, and is widely used in various polyurethane rigid foams, including polyisocyanurate plate rigid foams. The production methods of pentamethyldiethylenetriamine include formaldehyde formic acid method and formaldehyde hydrogenation method. |
| preparation | 99.5% diethylenetriamine is added into the high-pressure reactor, 5wt% Pd/C catalyst is added into the high-pressure reactor, and the amount of catalyst added accounts for 0.5wt% of the diethylenetriamine feed. After replacing the reaction kettle with nitrogen and hydrogen, the reaction kettle is filled with hydrogen to maintain 3MPa, stirred strongly, the materials in the reaction kettle are heated and maintained to 130 ℃, then formaldehyde solution with 37% content is added dropwise, and the molar ratio of formaldehyde dosage to diethylenetriamine dosage is 5.5: 1. Formaldehyde dripping time is controlled at 5 hours. After stopping hydrogen absorption, keep it for 10 minutes, cool down to 50 ℃, release the pressure and replace it, filter the reaction liquid in the kettle, and flush the solid catalyst into the reaction kettle through backwashing operation to continue to be used for the next batch of hydrogenation reaction. The main components of the filtrate are pentamethyldiethylenetriamine and water. The filtrate sample was taken for gas chromatography analysis, and the content of pentamethyldiethylenetriamine was 98.32wt%. Using the same batch of catalysts and repeating the same operation five times, the contents of pentamethyldiethylenetriamine are 98.26wt%, 97.83wt%, 98.11wt%, 97.24wt% and 97.82wt% respectively. |
| Use | Used as a high-efficiency catalyst for polyurethane soft foam Mainly used for sulfonylurea herbicides, pesticides, and pharmaceutical chemical synthesis Important raw material intermediates, it is also a high-quality acylating agent in the chemical industry such as polyamide, chemical cryogen, liquid crystal, etc. A high-efficiency tertiary amine catalyst The ligand of neopentyl lithium complexation was studied by NMR, and the ligand effect of CO2 interacting with α,ω-diyne was studied. N,N,N',N'',N''-pentamethyldiethylenetriamine catalyst is a highly active tertiary amine catalyst. Due to its unique amino nitrogen space shielding interaction, its alkaline characteristics can more effectively catalyze the reaction between water and isocyanate. Therefore, N,N,N',N'',N''-pentamethyldiethylenetriamine is an excellent foaming catalyst for rigid foam and soft foam, therefore, it is often shared with DMCHA and others. N,N,N',N'',N''-pentamethyldiethylenetriamine is also used to balance the overall foaming and gel reaction. |
| spontaneous combustion temperature | 311 °F |
Last Update：2024-04-12 11:37:46
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