N-n-Octadecyldimethylamine
N-n-Octadecyldimethylamine
CAS: 124-28-7
Molecular Formula: C20H43N
N-n-Octadecyldimethylamine - Names and Identifiers
| Name | N-n-Octadecyldimethylamine |
| Synonyms | DMA18 DMA1895 Dimantin armeen dm 18d AURORA KA-7650 DIMETHYL OCTADECYLAMINE Octadecyl dimethylamine Dimethyl Octadecyl Amine N-n-Octadecyldimethylamine N,N-Dimethyl Octadecyl Amine N,N-Dimethyl-n-octadecylamine 1-Octadecanamine, N,N-dimethyl- N-n-Octadecyl-N,N-dimethylamine |
| CAS | 124-28-7 |
| EINECS | 204-694-8 |
| InChI | InChI=1/C20H43N/c1-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19-20-21(2)3/h4-20H2,1-3H3 |
| InChIKey | NAPSCFZYZVSQHF-UHFFFAOYSA-N |
N-n-Octadecyldimethylamine - Physico-chemical Properties
| Molecular Formula | C20H43N |
| Molar Mass | 297.56 |
| Density | 0.8 |
| Melting Point | 23 °C |
| Boling Point | 347 °C |
| Flash Point | 155 °C |
| Water Solubility | Slightly soluble |
| Solubility | Chloroform (Slightly), Hexanes (Slightly) |
| Vapor Presure | 0.001-0.038Pa at 20-50℃ |
| Appearance | Liquid After Melting |
| Color | Clear colorless to yellow |
| pKa | 9.78±0.28(Predicted) |
| Storage Condition | Keep in dark place,Inert atmosphere,Room temperature |
| Refractive Index | 1.4461 |
| Physical and Chemical Properties | Density 0.8 melting point 23°C boiling point 347°C flash point 155°C water-soluble easily soluble |
| Use | For the preparation of quaternary ammonium salt, betaine, tertiary amine oxide |
N-n-Octadecyldimethylamine - Risk and Safety
| Hazard Symbols | C - Corrosive |
| Risk Codes | R34 - Causes burns R22 - Harmful if swallowed |
| Safety Description | S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. |
| UN IDs | 2735 |
| RTECS | RG4200000 |
| HS Code | 29211999 |
| Hazard Class | 8 |
| Packing Group | III |
N-n-Octadecyldimethylamine - Nature
Open Data Verified Data
light brown viscous liquid, soft solid at 20 ℃. The relative density was 0. 84. Melting point 22.5 °c. Boiling Point 202 °c. Soluble in alcohol solvents, insoluble in water.
Last Update：2025-06-10 22:55:16
N-n-Octadecyldimethylamine - Preparation Method
Open Data Verified Data
obtained by condensation of decylamine, formaldehyde and formic acid. The 80-Amine was added into the reactor, stirred evenly in the ethanol medium, the temperature was controlled at 50~60 ℃ and formic acid was added. After stirring for several minutes, formaldehyde was added at 60~65 ℃, raise the temperature to 80~83 ℃, reflux heat preservation for 2 hours, with liquid alkali neutralization, pH value is greater than 10, static stratification, water, vacuum distillation to remove ethanol after cooling, that is, N,N-= methyl octylamine.
Last Update：2022-01-01 10:35:22
N-n-Octadecyldimethylamine - Application
Open Data Verified Data
This product is an important organic synthesis intermediate for the preparation of quaternary ammonium salt type cationic surfactant. It can react with ethylene oxide, dimethyl sulfate, diethyl sulfate, methyl chloride, benzyl chloride and the like to generate different quaternary ammonium cations, which can be used in fabric softener, antistatic agent, hair combing and other products. It can also be used to produce insect repellents.
Last Update：2025-08-19 16:24:40
N-n-Octadecyldimethylamine - Safety
Open Data Verified Data
- This product has low toxicity.
- plastic barrel, 50kg per barrel. For long-distance transportation, the external use of wooden cases, the bottom of the barrel is lined with straw.
Last Update：2025-06-10 22:55:16
N-n-Octadecyldimethylamine - Reference Information
| LogP | 1.3-5.1 at 20℃ and pH7.1-8.8 |
| surface tension | 32.2mN/m at 1g/L and 25 ℃ |
| dissociation constant | 9.78 at 25 ℃ |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| purpose | This product is an important organic synthesis intermediate of quaternary ammonium salt type cationic surfactant. It can react with ethylene oxide, dimethyl sulfate, diethyl sulfate, methyl chloride, benzyl chloride and the like to generate different quaternary ammonium cations, which can be used for fabric softening, antistatic agent, improving hair combing and other products. It can also be used to produce insect repellents. The reaction of N,N-dimethyloctylamine with ethylene oxide and nitric acid results in the production of the decatyl dimethyl Hydroxyethyl quaternary ammonium nitrate, the antistatic agent SN. used in the preparation of quaternary ammonium salt, betaine, tertiary amine oxide, etc. |
| production method | prepared by condensation of ammonium, formaldehyde and formic acid. The 80-Amine was added into the reactor, stirred evenly in the ethanol medium, the temperature was controlled at 50-60 ℃ and formic acid was added. After stirring for several minutes, formaldehyde was added at 60-65 ℃ and the temperature was raised to 80-83 ℃, refluxing for 2H, neutralizing with liquid alkali to make the pH value greater than 10, standing for stratification, removing water, removing ethanol under reduced pressure and cooling to obtain N,N-dimethylethylamine. Raw material consumption quota: octaamine (industrial) 917kg/t, ethanol (95%)417kg/t, formic acid 510kg/t, formaldehyde (37%)546kg/t. In addition, there is a direct synthesis method from higher alcohols and dimethylamine. Using decanol and dimethylamine in the presence of a catalyst, 180-220 ° C. In the liquid phase for Catalytic Amination, remove one point of water, that is, the crude tertiary amine, after vacuum distillation to obtain high purity N,N-dimethyl octylamine. Consumption of 971kg of octaol and 170kg of dimethylamine per ton of product. |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 20:49:11
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View History
N-n-Octadecyldimethylamine
4-Methylpyridine-3-boronic
4-methyl-2-phenyl-m-dioxolane
2,4-Dimethyl-6-nitropheneol
二甲基亚甲基碘化胺
1,3-INDANEDIONE
纯碱
2-Fluoro-4-methylphenylacetic acid
二己基(辛基)氧膦
4 -甲基- 4 -戊烯酸
4-Methylpyridine-3-boronic
4-methyl-2-phenyl-m-dioxolane
2,4-Dimethyl-6-nitropheneol
二甲基亚甲基碘化胺
1,3-INDANEDIONE
纯碱
2-Fluoro-4-methylphenylacetic acid
二己基(辛基)氧膦
4 -甲基- 4 -戊烯酸