α-Naphtholbenzein
Reagent
Code: #127055
Alias
α-Naphtholquinonephenylmethane; 4-[(4-Hydroxy-1-naphthyl)phenylmethylene]-1(4H)-naphthalenone, α-naphtholylnaphthylquinonephenylmethane, 4 ,4'-(α-Hydroxybenzylidene) bis(1-naphthol), α-naphthoquinone
CAS Number
145-50-6
science Other reagents with same CAS 145-50-6
blur_circular Chemical Specifications
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Molecular Information
Weight
374.43 g/mol
Formula
C₂₇H₁₈O₂
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Registry Numbers
EC Number
205-656-3
MDL Number
MFCD00003979
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Physical Properties
Melting Point
230-235 °C(lit.)
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Storage & Handling
Storage
room temperature, away from light
description Product Description
α-Naphtholbenzein is primarily used as a pH indicator in various chemical and biological applications, exhibiting a color change from yellow at pH 8.2 to orange at pH 10.0. It is particularly effective in titrations, where it helps to determine the endpoint of acid-base reactions due to its distinct color change at specific pH levels. This compound is also utilized in analytical chemistry. Additionally, α-Naphtholbenzein is employed in research laboratories for studying enzyme activity and other biochemical processes that are pH-sensitive. Its ability to provide clear visual cues makes it a valuable tool in both educational and professional settings for experiments requiring precise pH measurements.
format_list_bulleted Product Specification
| Test Parameter | Specification |
|---|---|
| Melting Point | 225-245 |
| Solubility | Red to very dark red, 0.01 g in 10 mL ethanol |
| Appearance | Red to Dark Brown Solid |
| Visual Transition Interval from pH 8.2 | Yellow to Orange to pH 10.0 |
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