13138-48-2 Usage
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.]
Check Digit Verification of cas no
The CAS Registry Mumber 13138-48-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,3,1,3 and 8 respectively; the second part has 2 digits, 4 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 13138-48:
(7*1)+(6*3)+(5*1)+(4*3)+(3*8)+(2*4)+(1*8)=82
82 % 10 = 2
So 13138-48-2 is a valid CAS Registry Number.