Phenolphthalein (/fɛˈnɒl(f)θəliːn/[citation needed] feh-NOL(F)-thə-leen) is a chemical compound with the formula C20H14O4 and is often written as "HIn"...
20 KB (1,809 words) - 21:42, 8 June 2024
Kastle–Meyer test (redirect from Phenolphthalein test)
blood test, first described in 1903, in which the chemical indicator phenolphthalein is used to detect the possible presence of hemoglobin. It relies on...
9 KB (1,208 words) - 09:48, 10 April 2024
indicator is a solution containing potassium hexacyanoferrate(III) and phenolphthalein. It turns blue in the presence of Fe2+ ions, and pink in the presence...
1,023 bytes (90 words) - 09:40, 3 August 2023
precise amount of the analyte and a small amount of indicator (such as phenolphthalein) placed underneath a calibrated burette or chemistry pipetting syringe...
39 KB (4,670 words) - 20:43, 20 June 2024
1933. A universal indicator is usually composed of water, 1-propanol, phenolphthalein, sodium hydroxide, methyl red, bromothymol blue, sodium bisulfite,...
5 KB (423 words) - 08:10, 5 May 2024
ranges and colour transformations associated with specific indicators: Phenolphthalein is widely recognized as one of the most commonly used acid-base indicators...
24 KB (2,675 words) - 21:38, 19 March 2024
used as a laxative in 1953 because of its structural similarity to phenolphthalein. It is on the World Health Organization's List of Essential Medicines...
8 KB (671 words) - 21:13, 31 March 2024
structure affects a chromophore in the pH indicator molecule. For example, phenolphthalein is a pH indicator whose structure changes as pH changes as shown in...
12 KB (1,141 words) - 09:57, 12 May 2024
variety of more complex chemical compounds including dyes (such as phenolphthalein), fungicides (such as tetrachlorophthalide, often referred to simply...
2 KB (163 words) - 13:18, 1 February 2023
of alcoholic potassium hydroxide (KOH) of known concentration using phenolphthalein as a colour indicator. The acid number for an oil sample is indicative...
14 KB (1,616 words) - 08:30, 29 May 2024
industry: Water detection pastes contain a mix of calcium oxide and phenolphthalein. Should this paste come into contact with water in a fuel storage tank...
23 KB (2,231 words) - 06:34, 23 June 2024
Chlorophenol red Dixylenolphthalein Guaiacolphthalein α-Naphtholphthalein Phenolphthalein Phenolsulfonphthalein Tetrabromophenolphthalein Thymol blue Thymolphthalein...
1 KB (94 words) - 14:45, 3 April 2022
during World War I. In World War II, neutral or acidic solutions of phenolphthalein, a chemical compound extracted from pills for constipation, were used...
26 KB (3,210 words) - 14:24, 7 March 2024
traces of phenolphthalein and sibutramine were detected by the company in batches of the capsule form of Po Chai, and were recalled. Phenolphthalein's past...
6 KB (709 words) - 18:13, 22 June 2024
10−3 M) have a pH of 10 or greater. This means that they will turn phenolphthalein from colorless to pink. Concentrated solutions are caustic (causing...
7 KB (799 words) - 19:55, 10 June 2024
chemical reaction. It can be found by means of an indicator, for example phenolphthalein or methyl orange. The endpoint (related to, but not the same as the...
8 KB (1,118 words) - 08:14, 21 May 2024
methyl orange is, in fact, orange. pH indicator Methyl red Litmus Phenolphthalein Bromothymol blue Congo red Universal indicator Haynes, William M.,...
7 KB (603 words) - 15:10, 6 June 2024
theory in small carbon rings. In 1871 he discovered the synthesis of phenolphthalein by condensation of phthalic anhydride with two equivalents of phenol...
16 KB (1,434 words) - 11:19, 13 June 2024
pH greater than 7, the most suitable indicator to use is one, like phenolphthalein, that changes color at high pH. The situation is analogous to that...
17 KB (2,133 words) - 10:10, 24 June 2024
Thymolphthalein can be synthesized from thymol and phthalic anhydride. Phenolphthalein "Thymolphthalein". pubchem.ncbi.nlm.nih.gov. Hahn HH; Cheuk SF; Elfenbein...
4 KB (172 words) - 02:40, 3 August 2023
The dissociation mechanism of chlorophenol red is similar to that of phenolphthalein meaning it can be used as a color indicator. The dissociation of hydroxyl...
5 KB (341 words) - 18:46, 10 April 2024
NF-157 NF-279 NF-449 Opiranserin (VVZ-149) Oxidized-ATP Phenol Red Phenolphthalein PPADS PPNDS PSB-12062 Puerarin (Radix puerariae) Purotoxin 1 RB-2 Ro...
231 KB (23,832 words) - 09:34, 26 June 2024
of two compounds present in ferroxyl indicator solution (along with phenolphthalein) that turns blue (Prussian blue) in the presence of Fe2+ ions, and...
13 KB (1,199 words) - 22:51, 13 June 2024
colon 36–8 hours Aloe vera (aloin) Anthraquinone colon 58–10 hours Phenolphthalein Triphenylmethane colon 48 hours Bisacodyl (oral) Triphenylmethane colon...
24 KB (2,439 words) - 22:08, 17 February 2024
reaction with para-chlorophenol followed by hydrolysis of the chloride. Phenolphthalein can be synthesized by the condensation of phthalic anhydride with two...
14 KB (1,150 words) - 23:26, 13 June 2024
sulfur atom being part of a cyclic group, similar to the structure of phenolphthalein. However, this cyclic structure could not be confirmed by X-ray crystallography...
11 KB (1,088 words) - 04:35, 5 February 2024
they are adulterated with unapproved drugs including sibutramine and phenolphthalein. There are several artificial pollen diets available for honeybees...
14 KB (1,389 words) - 23:12, 8 May 2024
Burette over a conical flask with phenolphthalein indicator used for acid–base titration...
19 KB (2,707 words) - 05:16, 9 June 2024
range of the color change the better. In some indicators, such as phenolphthalein, one of the species is colorless, whereas in other indicators, such...
19 KB (1,670 words) - 06:53, 22 January 2024
NF-157 NF-279 NF-449 Opiranserin (VVZ-149) Oxidized-ATP Phenol Red Phenolphthalein PPADS PPNDS PSB-12062 Puerarin (Radix puerariae) Purotoxin 1 RB-2 Ro...
37 KB (3,692 words) - 07:52, 19 June 2024