really cool indicator! definitely would recommend to friend!
105945
Phenolphthalein
ACS reagent
Phenolphthalein
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Synonym(s):
3,3-Bis(4-hydroxyphenyl)-1(3H)-isobenzofuranone
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| Pack Size | SKU | Availability | Price |
|---|---|---|---|
| 100 g | Available to ship TODAYfromMILWAUKEE | $62.30 | |
| 500 g | Available to ship TODAYfromMILWAUKEE | $206.00 | |
| 2.5 kg | Available to ship TODAYfromMILWAUKEE | $692.00 |
About This Item
Empirical Formula (Hill Notation):
C20H14O4
CAS Number:
Molecular Weight:
318.32
EC Number:
201-004-7
UNSPSC Code:
12171500
NACRES:
NA.47
PubChem Substance ID:
MDL number:
Colour Index Number:
764
Beilstein/REAXYS Number:
284423
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grade
ACS reagent
Quality Level
form
powder
technique(s)
titration: suitable
visual transition interval
8.0-10, colorless to red
mp
261-263 °C (lit.)
solubility
acetone: soluble
density
1.27 g/cm3 at 32 °C
λmax
374 nm (2nd), 552 nm
application(s)
diagnostic assay manufacturing
hematology
histology
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Related Categories
1 of 1
This Item | |||
|---|---|---|---|
| technique(s) titration: suitable | technique(s) titration: suitable | technique(s) - | technique(s) - |
| grade ACS reagent | grade - | grade ACS reagent | grade JIS special grade |
| form powder | form liquid | form solid | form solid |
| solubility acetone: soluble | solubility - | solubility - | solubility acetone: soluble |
| application(s) diagnostic assay manufacturing | application(s) diagnostic assay manufacturing | application(s) - | application(s) - |
| Quality Level 200 | Quality Level 200 | Quality Level 200 | Quality Level - |
General description
Phenolphthalein is an indicator for acid-base titration reactions. It changes from colorless to violet-red between pH 8.3-9.8, it is red in extremely acidic solutions, and colorless in extremely alkaline solutions.
It is present as a nonionic, lipophilic lactone in aqueous neutral solutions. It exists as a hydrophilic dianion in alkaline solutions.
It is present as a nonionic, lipophilic lactone in aqueous neutral solutions. It exists as a hydrophilic dianion in alkaline solutions.
Application
Phenolphthalein has been commonly used as an indicator in the fields of biology and medicine. Its applications include:
- the development of novel technique to monitor the vacuum freeze-drying process
- the determination of the depth of carbonation in concrete
- the utilization of liquid marbles to sense gaseous environmental components
- the estimation of total acidity in vinegar
- the assessment of sodium hydroxide penetration into potatoes following chemical peeling
- as a model organic compound in the evaluation of the capture efficiency of various cyclodextrin constructs such as nanofiber-CD
Biochem/physiol Actions
Phenolphthalein is colorless in acidic solutions and turns pink in basic solutions.
Phenolphthalein undergoes structural modification when there is a change in pH or in the structural state of water. It is a nonionic, lipophilic colorless lactone in aqueous neutral solutions and a hydrophilic dianion in alkaline solutions.
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Danger
hcodes
Hazard Classifications
Carc. 1B - Muta. 2 - Repr. 2 - Skin Irrit. 2
Storage Class
6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type P3 (EN 143) respirator cartridges
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Find documentation for the products that you have recently purchased in the Document Library.
The experimental investigation of concrete carbonation depth
Cheng-Feng Chang, Jing-Wen Chen
Cement and Concrete Research, 36(9) (2006)
Teaching New Tricks to an Old Indicator: pH-Switchable, Photoactive Microporous Polymer Networks from Phenolphthalein with Tunable CO2 Adsorption Power
Kiskan, et al.
Macromolecules (2012)
Conn?s Biological Stains: A Handbook of Dyes, Stains and Fluorochromes for Use in Biology and Medicine (10th ed.)
RW Horobin, JW Kiernan (Eds.)
Conn?s Biological Stains (2002)
Using phenolphthalein as a promising indicator to monitor the vacuum freeze-drying process
Liu, et al.
Materials Letters, 139 (2015)
Min Guk Kim et al.
Journal of personalized medicine, 10(4) (2020-10-15)
Unbalanced dietary habits and the consumption of high protein and instant foods cause an increase in constipation. Here, we evaluated the effects of galacto-oligosaccharide (GOS) on a rat model of loperamide-induced constipation by measuring various biological markers and cecal microbiota.
Global Trade Item Number
| SKU | GTIN |
|---|---|
| 105945-100G | 04061835570140 |
| 105945-500G | 04061835570157 |
| 105945-2.5KG | 04061833646014 |
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