Other grades of this product :
| Product Name: | 3,3'-DIMETHYLNAPHTHIDINE | | Synonyms: | 3,3'-DIMETHYLNAPHTHIDINE;3,3-DIMETHYLNAPHTHIDINE;3,3'-DIMETHYL-(1,1'-BINAPHTHALENE)-4,4'-DIAMINE;4,4'-DIAMINO-3,3'-DIMETHYL-1,1'-BINAPHTHYL;3,3-Dimethylnaphthidine (for colorimetric detemination of Cl in water);1,1-Binaphthalene-4,4-diamine, 3,3-dimethyl-;4 4-DIAMINO-3 3-DIMETHYL-1,1-BINAPHTHYL 98%;3,3-DIMETHYLNAPHTHIDINE [FOR COLORIMETRIC DETERMINATION OF CL IN WATER] 97+% | | CAS: | 13138-48-2 | | MF: | C22H20N2 | | MW: | 312.41 | | EINECS: | 236-069-0 | | Product Categories: | | Mol File: | 13138-48-2.mol |
| 3,3'-DIMETHYLNAPHTHIDINE Chemical Properties |
| Melting point | 232 °C | | Boiling point | 479.3±40.0 °C(Predicted) | | density | 1.201±0.06 g/cm3(Predicted) | | storage temp. | Store below +30°C. | | Water Solubility | Slightly soluble in water | | pka | 4.79±0.10(Predicted) | | form | powder to crystal | | color | White to Gray to Brown | | BRN | 2152306 | | CAS DataBase Reference | 13138-48-2(CAS DataBase Reference) |
| Hazard Codes | Xi | | Risk Statements | 36/37/38 | | Safety Statements | 26-37/39 | | WGK Germany | 3 | | HS Code | 2921 59 90 |
| 3,3'-DIMETHYLNAPHTHIDINE Usage And Synthesis |
| Description | 3, 3-Dimethylnaphthidine is a polycyclic aromatic hydrocarbon, being one kind of dimethylnaphthidine isomers. It is a useful indicator for metal titration (for example, the titration of aluminum using EDTA method, determination of vanadium). It has also been used for the photometric determination of small amount of oxygen as well as chlorine in water.
| | Sources | https://en.wikipedia.org/wiki/2,6-Dimethylnaphthalene
https://www.sigmaaldrich.com/catalog/product/aldrich/358932?lang=zh®ion=CN
http://www.titrations.info/EDTA-titration-aluminum
http://pubs.rsc.org/en/content/articlehtml/1971/an/an9719600591
http://pubs.rsc.org/en/content/articlehtml/1968/an/an9689300142
https://pubs.acs.org/doi/pdf/10.1021/ac60088a056
| | Purification Methods | Recrystallise the naphthidine from EtOH or pet ether (b 60-80o). [Beilstein 13 IV 493.] |
| 3,3'-DIMETHYLNAPHTHIDINE Preparation Products And Raw materials |
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