Color From
 |
 DIANE 890 HAIR SALON EAR SHIELD PROTECT EAR FROM COLOR HEAT US $3.50 |
 DIANE 890 SALON EAR SHIELD PROTECT EAR FROM COLOR HEATBLACK US $3.50 |
 Biosilk Liquid Gel Hair Color Select Shade From List US $1.80 |
How to keep phenolphtalein's fuschia color from fading?
I have a basic solution (contains formaldehyde) fuschia-colored by phenolphtalein. But, its color fades from time to time. Is there any method to make the color stays? Is formaldehyde makes it fades? Can methanol prevent it from fading?
Thanks.
I have made several PROTOTYPES (PP) before the FINAL PRODUCTS (FP). But, compared to FP, PPs don't show any sign of fading. I put the PP in a container similar to FP. Is temperature & light has effects on this case? Because I put the PP at 26-29C & dark place, while th FP at 30-33C & relatively bright place.
I read that methanol is solvent & can stabilise the oxidation process of the formaldehyde. Can it pratically be the oxidation inhibitor?
Phenolphthalein fades when a solution's pH drops.
Formaldehyde is oxidized by oxygen in the air into formic acid. The presence of formic acid lowers the pH so the pink color fades. You could probably keep the solution basic by properly sealing your container to make sure no air can get into it to oxidize the formaldehyde.
Sorry for taking so long to get back to you.
Have you done anything with the methanol yet? The thing is that methanol will stabilize the formaldehyde to an extent but the fact remains that the base present in solution will catalyze the oxidation of formaldehyde. The catalysis is called a Cannizzaro reaction, and you can read more about it here: http://en.wikipedia.org/wiki/Cannizzaro_reaction
What are you trying to do with your formaldehyde base solution? What is the base you are using in your solution? If you just wanted a fuchsia-colored solution you could just make a basic solution and add some phenolpthalein, and don't put any formaldehyde in.
Carbon Leaf - War Was In Color
Tags: color, color from hex, color from hex c, color from image, color from rgb, color from the dark, color fromargb, css, design, palette, tools, webdesign
