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| Classification | Paint Additives |
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CAS No. 105-59-9
Content 99.50%
Packing 200kg/drum
| Name | N-Methyldiethanolamine |
| Synonyms | MDEA Methyl Diethanlamine METHYL DIETHANOLAMINE N-METHYLDIETHANOLAMINE N-Methyldiethanolamine N-Methyl Diethanolamine N-Methylediethanolamine 2,2-Methyliminodiethanol 2,2-(Methylimino)Diethanol N-METHYL-2,2′-IMINODIETHANOL BIS(2-HYDROXYETHYL)METHYLAMINE N-METHYL-2,2-IMINOBIS(ETHANOL) N,N-BIS(2-HYDROXYETHYL)METHYLAMINE N-METHYL-N-(2-HYDROXYETHYL)-2-AMINOETHANOL 2-hydroxy-N-(2-hydroxyethyl)-N-methylethanaminium |
| CAS | 105-59-9 |
| EINECS | 203-312-7 |
| InChI | InChI=1/C5H13NO2/c1-6(2-4-7)3-5-8/h7-8H,2-5H2,1H3/p+1 |
| InChIKey | CRVGTESFCCXCTH-UHFFFAOYSA-N |
| Molecular Formula | C5H13NO2 |
| Molar Mass | 119.16 |
| Density | 1.038g/mLat 25°C(lit.) |
| Melting Point | -21 °C |
| Boling Point | 246-248°C(lit.) |
| Flash Point | 260°F |
| Water Solubility | MISCIBLE |
| Vapor Presure | 0.01 mm Hg ( 20 °C) |
| Vapor Density | 4 (vs air) |
| Appearance | Liquid |
| Color | Clear colorless to light yellow |
| Odor | Ammonical |
| BRN | 1734441 |
| pKa | 14.41±0.10(Predicted) |
| PH | 11.5 (100g/l, H2O, 20℃) |
| Storage Condition | Store below +30°C. |
| Stability | Stable. Combustible. Incompatible with strong oxidizing agents. |
| Explosive Limit | 0.9-8.4%(V) |
| Refractive Index | n20/D 1.469(lit.) |
| Physical and Chemical Properties | colorless or yellowish viscous liquid boiling point 246~248 ℃ flash point 260 ℃ freezing point -21 ℃ latent heat of vaporization 519.16KJ/Kg boiling point 247 ℃ water-soluble, soluble in water and alcohol, slightly soluble in ether |
| Use | It is a new solvent with excellent performance for selective desulfurization and decarburization. It has the advantages of high selectivity, less solvent consumption, remarkable energy saving effect, and not easy to degrade. Widely used in oil gas and gas desulfurization purification emulsifier and acid gas absorbent, acid-base control agent, polyurethane foam catalyst. The carbon dioxide in synthetic ammonia can be removed with the participation of an activator, so that it has been gradually promoted in the absorption of carbon dioxide in flue gas in recent years. In addition, MDEA can also be used as pesticides, emulsifiers, semi-finished products of fabric additives, intermediates of antineoplastic drug hydrochloric acid nitrogen mustard, catalyst of carbamate coatings, it is also a drying accelerator for paint. |
| Hazard Symbols | Xi – Irritant |
| Risk Codes | 36 – Irritating to the eyes |
| Safety Description | 24 – Avoid contact with skin. |
| UN IDs | 2735 |
| WGK Germany | 1 |
| RTECS | KL7525000 |
| TSCA | Yes |
| HS Code | 2922 17 00 |
| Hazard Class | 8 |
| Packing Group | II |
| Toxicity | LD50 orally in Rabbit: 4680 mg/kg |
| pH range of acid-base indicator discoloration | 11.5 at 100g/l at 20°C |
| LogP | -1.16 at 23℃ |
| purpose | mainly used as emulsifier and acid gas absorbent, acid-base control agent, polyurethane foam catalyst. It is also used as an intermediate of the antitumor drug nitrogen hydrochloride and the like. |
| production method | 1. From the reaction of formaldehyde and diethanolamine. Formic acid was added to the reaction pot and heated to boiling, and a mixed solution of formaldehyde and diethanolamine was added dropwise under stirring for about 1H. The temperature was maintained at 90-98 ° C., and reflux was continued for 4 hours. Then, distillation under reduced pressure was carried out to collect a fraction at 120-130 ° C. (0.53kPa) to obtain N-methyldiethanolamine in a yield of 85%. Derived from the reaction of methylamine with ethylene oxide. The temperature was kept below 30 ° C., and the addition reaction was carried out by introducing ethylene oxide gas into 20% methylamine solution until the relative density of the reaction solution reached 1.025. Stirring for 15min, the relative density is unchanged for the end point. Methylamine was recovered to 103 ° C. Under normal pressure, and after water was evaporated under reduced pressure, a 119-170 ° C. (4.67kPa) fraction was collected. It is the finished product. The yield was 72%. Raw material consumption quota: Ethylene oxide 950kg/t, methylamine (40%)870kg/t. In addition, N-methyl diethanolamine can be obtained by catalytic hydrogenation of formaldehyde and cyanoethanol. |
| spontaneous combustion temperature | 770 ° F. |
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