DCIP dye

Hi Ilona,

Try here

I just entered "2,3-dichloroindophenol" in Google and found it in 2 seconds!

Good luck with your project!

Mike Hogan, P.E. (ChE)

Hello Mike!

Yes it is not difficult to find the chemical itself, but to make the formulation. We do not have a laboratory and would like to have someone to make the mixture for us.

Best regards

Ilona

2,6-Dichlorophenolindophenol DCIP dye:
Unless stated otherwise, all reagents were Analar grade and used, as received, from Sigma-Aldrich. The conditions referred to as "ambient atmospheric conditions" are on the
open bench at room temperature (ca. 20◦C) and a relative humidity of ca. 60%. A typical DCIP ink was prepared as follows: 3 g of a 1.5wt% hydroxyethylcellulose (Fluka, medium viscosity)solution in water were placed in a sample bottle and to it
were added 0.3 g of glycerol. The resulting solution was gently stirred whilst 5mg of 2,6-dichloroindophenol (supplied by Alfa-Aesar, sodium salt hydrate, 98%) were added slowly.The solution was placed in an ultrasound bath and sonicated for 5 minutes in order to ensure complete dissolution of the dye, before being subjected to further gentle stirring for 30 minutes. Ink produced in this manner appeared stable and unchanged for at least 1month, and was used as required. In terms of parts per hundred resin (pphr), the level of polymer/SED/dye in the ink formulation is equivalent
to a ratio of 100/667/11. Such a DCIP ink is referred to henceforth as the standard formulation.

Hello Ilona,

What quantities are you looking for and in what country is your business?

Also, is the concentration of the indicator in the procedure you included acceptable? Will you need the supplier to work with you over a period of time to nail down the right formula?

Mike

Hello Mike!

We want to test DCIP dye first and 20 ml is OK. If it works we are going to use ca. 20 ml every month. We use the ink to controll that our Titania sol gel is photocatalytic active.

Multi-Tek A/S where i work is in Denmark.

Send you the article with desciption and test of the ink. Open full text PDF in http://www.hindawi.com/GetArticle.aspx?doi=10.1155/2008/504945

Best regards from Ilona

I have used this DCIP. A blue powder. In redox ,I used it for vitamic C (ascorbic acid) titration. DCIP is sensitive to light and prepare it and use it fresh. Quite a common chemical, available from any lab chemical supply for biochemistry lab. Hope this information will help u. write to me, if u want;Doveli2000@hotmail.com I am a Medical Technologist by the way.

U can get it from any lab chemcial supplier, take not this sensitive to light, use it fresh, keep in the refigerator.

Aldrich offers sodium 2,6-dichloroindophenolate hydrate; catalog # 11,981-4; 10 gm, $ 32.30. Telephone: 800-231-8237; e-mail: aldrich@sial.com

Actually u may not need the ultrasound bath which is expensive equipment. Try to use the weighing spatula to grind the DCIP dye against the wall of beaker until all the powder dissolve.(in your case , you can use a BROWN bottle ,big-cap). Brown bottle is to protect it from light , or use aluminim foil wrap up the final solution. MUST KEEP IT IN REFEGERATOR. I think you can make it without ultrasound.

Just an article about dye being dispersed by ultrasound:

Effects of ultrasound treatment and dye crystalline properties on particle size distribution

Textile Research Journal, Nov 2001 by Lee, Keun-Wan, Chung, Yong-Sik, Kim, Jae-Pil

ABSTRACT

The influence of ultrasound on changes in dye particle size and the specific breakage rate of disperse dyes with different crystalline properties are investigated. The results show that ultrasound breaks larger dye particles suspended in water in their insoluble form into finer dye particles and reduces the mean particle size of disperse dyes. The specific breakage rate for dye particles irradiated by ultrasound depends on their crystalline properties, and the breakage rate of a well crystallized dye is higher than that of a poorly crystallized dye.

Ultrasound is a sound wave with a frequency above the audible range of humans. It may be broadly divided into power ultrasound (18 kHz-1 MHz) and diagnostic ultrasound (over 1 MHz).

For many years, ultrasound has been of interest to chemists as a processing aid in a wide variety of applications. Researchers have shown that ultrasonic energy can be a powerful means of enhancing reaction rates in textile dyeing processes, and many studies on the potential uses of ultrasound baths have been reported in the literature [15, 16, 17, 19, 20].

Ultrasound can enhance the efficiency of dyeing processes, mainly due to the phenomenon known as cavitation in a liquid medium, which is the growth and explosive collapse of microscopic bubbles [17, 19]. According to Mason, there is a significant decrease in the size of solid particles after ultrasonic irradiation [12]. Tomlison and other workers also studied reductions in solid particle size with ultrasound irradiation [14, 18, 21]. The particle size of disperse dyes is an important parameter influencing the dyeing behavior of the dye dispersion. Many reports have shown the effect of disperse dye particle size on dyeing properties [1, 2, 5, 10].

To understand the effect of ultrasound irradiation on the fragmentation of dye particles with different crystalline properties, we have studied the crystalline properties of two disperse dyes and investigated changes in particle size distribution and the specific rate of fragmentation with ultrasound irradiation.

Hello Leehongkai!

Thank you for the information!

Best regards from Ilona