Search results
Results from the WOW.Com Content Network
The substance, IUPAC name (29H,31H-phthalocyaninato(2−)-N29,N30,N31,N32)copper(II), is known by many names [2] such as monastral blue, phthalo blue, helio blue, [3] thalo blue, Winsor blue, [4] phthalocyanine blue, C.I. Pigment Blue 15:2, [5] [6] copper phthalocyanine blue, [7] copper tetrabenzoporphyrazine, [8] Cu-phthaloblue, [9] P.B.15.2, [10] [11] [12] C.I. 74160, [13] [14] [15] and ...
A flame test involves introducing a sample of the element or compound to a hot, non-luminous flame and observing the color of the flame that results. [4] The compound can be made into a paste with concentrated hydrochloric acid, as metal halides, being volatile, give better results. [5] Different flames can be tried to verify the accuracy of ...
It is a white crystalline powder, soluble in water, ethanol and acetone but insoluble in ether. ... In the TTC assay (also known as TTC test or tetrazolium test), TTC ...
The main use of litmus is to test whether a solution is acidic or basic, as blue litmus paper turns red under acidic conditions, and red litmus paper turns blue under basic or alkaline conditions, with the color change occurring over the pH range 4.5–8.3 at 25 °C (77 °F). Neutral litmus paper is purple. [2]
The following chart shows the solubility of various ionic compounds in water at 1 atm pressure and room temperature (approx. 25 °C, 298.15 K). "Soluble" means the ionic compound doesn't precipitate, while "slightly soluble" and "insoluble" mean that a solid will precipitate; "slightly soluble" compounds like calcium sulfate may require heat to precipitate.
[4] [2] [5] [6] Inconsistency exists in the literature about hydrated forms of the compounds and the color of sulfuric acid. Wittke reported in 1983 that it exists in protonated form (H 3 In +) under strongly acidic conditions, providing an orange coloration. However, a later paper suggested that this color is due to sulfonation to ...
It is an azo dye, and is a dark red crystalline powder. Methyl red is a pH indicator ; it is red in pH under 4.4, yellow in pH over 6.2, and orange in between, with a p K a of 5.1. [ 2 ] Murexide and methyl red are investigated as promising enhancers of sonochemical destruction of chlorinated hydrocarbon pollutants .
Different colors of bromothymol blue at marked pH conditions. Bromothymol blue may be used for observing photosynthetic activities, or as a respiratory indicator (turns yellow as CO 2 is added). [ 7 ] [ 8 ] A common demonstration of BTB's pH indicator properties involves exhaling through a tube into a neutral solution of BTB.