13138-48-2

Basic information

• 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);3 3'-DIMETHYLNAPHTHIDINE REDOX IND. &;3,3'-DIMETHYLNAPHTHIDINE INDICATOR FOR M ETAL TITRATION;1,1-Binaphthalene-4,4-diamine, 3,3-dimethyl-
• CAS NO: 13138-48-2
• Molecular Formula: C₂₂H₂₀N₂
• Molecular Weight: 312.41
• EINECS: 236-069-0
• Mol File: 13138-48-2.mol
• Article Data: 0

Chemical Properties

• Melting Point: 232 °C
• Boiling Point: 479.3 °C at 760 mmHg
• Flash Point: 292.7 °C
• Appearance: /
• Density: 1.201 g/cm³
• Storage Temp.: Store below +30°C.
• PKA: 4.79±0.10(Predicted)
• Water Solubility: Slightly soluble in water
• BRN: 2152306
• CAS DataBase Reference: 3,3'-DIMETHYLNAPHTHIDINE(CAS DataBase Reference)
• NIST Chemistry Reference: 3,3'-DIMETHYLNAPHTHIDINE(13138-48-2)
• EPA Substance Registry System: 3,3'-DIMETHYLNAPHTHIDINE(13138-48-2)

Safety Data

• Hazard Codes: Xi
• Statements: 36/37/38
• Safety Statements: 26-37/39
• WGK Germany: 3
• Hazardous Substances Data: 13138-48-2(Hazardous Substances Data)

Usage

Description

3,3'-Dimethylnaphthidine is a polycyclic aromatic hydrocarbon, specifically one of the dimethylnaphthidine isomers. It is characterized by its unique chemical structure and properties, making it a valuable compound for various analytical and industrial applications.

Uses

Used in Chemical Analysis:
3,3'-Dimethylnaphthidine is used as an indicator in metal titration processes for the accurate determination of metal concentrations. Its application reason is its ability to change color in the presence of specific metal ions, allowing for precise measurement and analysis.
Used in Water Quality Assessment:
3,3'-Dimethylnaphthidine is used as a photometric reagent for the determination of small amounts of oxygen and chlorine in water. Its application reason is its sensitivity to these specific elements, enabling accurate and reliable measurements in water quality analysis.
Used in Pharmaceutical Industry:
Although not explicitly mentioned in the provided materials, 3,3'-Dimethylnaphthidine could potentially be used in the pharmaceutical industry as a starting material for the synthesis of various drugs or as an intermediate in chemical reactions. Its application reason would be its unique chemical properties and reactivity, which could be harnessed for the development of new pharmaceutical compounds.

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.]

Upstream product

• 7664-93-9 sulfuric acid 
• 7782-77-6 cis-nitrous acid 
• 64-19-7 acetic acid 
• 7722-84-1 dihydrogen peroxide 
• 2246-44-8 1-amino-2-methylnaphthalene 

Downstream Products

• 1193110-71-2 (E)-N-((E)-3-(4-(dimethylamino)phenyl)allylidene)-4-(4-((E)-((E)-3-(4-(dimethylamino)phenyl)allylidene)-amino)-3-methylnaphthalen-1-yl)-2-methylnaphthalen-1-amine