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| | 4,4'-DIAMINO-3,3'-DIMETHYLDIPHENYLMETHANE Basic information |
| | 4,4'-DIAMINO-3,3'-DIMETHYLDIPHENYLMETHANE Chemical Properties |
| Melting point | 155-157 °C | | Boiling point | 357.94°C (rough estimate) | | density | 0.9543 (rough estimate) | | vapor pressure | 1.8hPa at 205.5℃ | | refractive index | 1.5000 (estimate) | | storage temp. | Keep in dark place,Inert atmosphere,Room temperature | | Water Solubility | Insoluble in water | | solubility | Chloroform (Slightly), Methanol (Slightly) | | pka | 5.18±0.25(Predicted) | | color | White to Light yellow to Light orange | | BRN | 398069 | | InChIKey | WECDUOXQLAIPQW-UHFFFAOYSA-N | | CAS DataBase Reference | 838-88-0(CAS DataBase Reference) | | IARC | 2B (Vol. 4, Sup 7) 1987 | | EPA Substance Registry System | 4,4'-Methylenebis(2-methylaniline) (838-88-0) |
| Hazard Codes | T,N | | Risk Statements | 45-22-43-50/53 | | Safety Statements | 53-45-60-61 | | RIDADR | UN 3077 9/PG 3 | | WGK Germany | 3 | | RTECS | BY5300000 | | F | 10-23 | | HazardClass | 6.1(b) | | PackingGroup | III | | HS Code | 29215900 |
| | 4,4'-DIAMINO-3,3'-DIMETHYLDIPHENYLMETHANE Usage And Synthesis |
| Chemical Properties | White powder. Soluble in ethanol and hot water. | | Uses | 4,4′-Methylene-bis(2-methylaniline) has been used as a reference standard for the determination of 4,4′-methylene-bis(2-methylaniline) in plastic multilayer food packaging materials by liquid chromatography (LC)-Orbitrap-full scan-high resolution mass spectrometry (HRMS).
It may be used as a reference standard for the analysis of 4,4′-methylene-bis(2-methylaniline) in dyes, cosmetics, finger paints and inks for pens and tattoos by LC-MS. | | Uses | 4,4'-Diamino-3,3'-dimethyldiphenylmethane can be used for preparation polyimide and epoxy resin material. | | Definition | ChEBI: 4,4'-Methylene bis(2-methylaniline) is a diarylmethane. | | General Description | 4,4′-Methylene-bis(2-methylaniline) belongs to the primary aromatic amines (PAAs) family of compounds which are toxic in nature and are probable human carcinogens. | | Safety Profile | Confirmed carcinogen
with experimental carcinogenic data.
Moderately toxic by ingestion. An eye
irritant. Mutation data reported. When
heated to decomposition it emits toxic
fumes of NOx. | | Synthesis | (1) o-toluidine, water and 37% hydrochloric acid were added into the reactor in the ratio of o-toluidine to hydrochloric acid at the molar ratio of 1:1.2 and the weight ratio of o-toluidine to water at the ratio of 1:4, and the reaction was stirred for 30 minutes; (2) the 37% formaldehyde solution was diluted to 10%; (3) the reaction solution from step (1) and the diluted formaldehyde solution from step (2) were transported via advective pumps to each of the microreactor's two inlets, controlling the molar ratio of o-toluidine to formaldehyde to be 3:1; (4) in the microreactor, the two raw materials were contacted, mixed and reacted, the reaction temperature was controlled at 40 °C, the liquid-time air velocity was 3000 h-1, and the reacted solution flowed out from the reactor outlet; (5) the reaction solution was cooled down to room temperature, and the aqueous sodium hydroxide was added dropwise to adjust pH to about 9, and a large amount of white precipitate precipitated, which was filtered, drying to obtain 3,3'-dimethyl-4,4'-diaminodiphenylmethane (MDT) crude product; (6) the crude MDT was recrystallized by ethanol, filtered and dried to obtain the pure MDT with a molar yield of 86% and a purity of 99%. | | References | [1] Patent: CN106986777, 2017, A. Location in patent: Paragraph 0043-0055; 0057; 0059; 0061; 0063; 0065
[2] Catalysis Communications, 2014, vol. 45, p. 69 - 73
[3] Journal of the American Chemical Society, 1935, vol. 57, p. 887,889
[4] Journal of the American Chemical Society, 1934, vol. 57, p. 1944
[5] Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1982, vol. 21, # 8, p. 721 - 723 |
| | 4,4'-DIAMINO-3,3'-DIMETHYLDIPHENYLMETHANE Preparation Products And Raw materials |
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