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3,3'-DIMETHYLNAPHTHIDINE

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3,3'-DIMETHYLNAPHTHIDINE 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)
  • 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
Mol File:
13138-48-2.mol
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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.
pka
4.79±0.10(Predicted)
BRN 
2152306
CAS DataBase Reference
13138-48-2(CAS DataBase Reference)
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Safety Information

Hazard Codes 
Xi
Risk Statements 
36/37/38
Safety Statements 
26-37/39
WGK Germany 
3
HS Code 
2921 59 90

MSDS

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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&region=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'-DIMETHYLNAPHTHIDINESupplier

J & K SCIENTIFIC LTD.
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