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

form 

powder to crystal

pka

4.79±0.10(Predicted)

color 

White to Gray to Brown

BRN 

2152306

CAS DataBase Reference

13138-48-2(CAS DataBase Reference)

Safety Information

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-37/39

WGK Germany 

3

HS Code 

2921 59 90

MSDS

• Language:English Provider:SigmaAldrich

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'-DIMETHYLNAPHTHIDINE(13138-48-2)Related Product Information

• 1-AMINO-2-METHYLNAPHTHALENE
• 1,1'-BINAPHTHYL
• 3,3'-DIMETHYL-NAPHTHIDINE-DISULFONIC ACID
• naphthidine
• 3,3'-DIMETHYLNAPHTHIDINE
• O-Tolidine
• 3'-METHYL-BIPHENYL-4-YLAMINE
• 1-PHENYLNAPHTHALENE
• 1,3-DIMETHYLNAPHTHALENE
• 4-AMINO-3-METHYLBIPHENYL