α-Naphtholbenzein
Based on 1 Customer Validation
α-Naphtholbenzein (p-Naphtolbenzein) is a dye. α-Naphtholbenzein can be used as a pH indicator. α-Naphtholbenzein is commonly used in experiments such as acid-base neutralization reactions, titration, and pH measurement.
For research use only. We do not sell to patients.
- Purity: 87.20%
- CAS No.: 145-50-6
- Formula: C27H18O2
- Molecular Weight:374.44
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Storage:Powder -20°C, 3 years , 4°C, 2 years ; In solvent -80°C, 6 months , -20°C, 1 month
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Biological Activity
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Chemical Information
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Solvent & Solubility
- Purity & Documentation
- References
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Help & FAQs
Biological Activity
α-Naphtholbenzein has a visual transition from yellow (pH0-8.2) to turquoise (pH10)[1].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
Chemical Information
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CAS No. 145-50-6
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Appearance Solid
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Molecular Weight 374.44
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Formula C27H18O2
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Color Brown to reddish brown
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SMILES
O=C1C=C/C(C2=C1C=CC=C2)=C(C3=C4C=CC=CC4=C(O)C=C3)/C5=CC=CC=C5
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Synonyms
p-Naphtolbenzein
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Shipping
Room temperature in continental US; may vary elsewhere.
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Storage
Powder -20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month
Solvent & Solubility
DMSO : 50 mg/mL (133.53 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
Purity & Documentation
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Data Sheet (276 KB)
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SDS (393 KB)
- English - EN (393 KB)
- Français - FR (393 KB)
- Deutsch - DE (393 KB)
- Norwegian - NO (393 KB)
- Español - ES (393 KB)
- Swedish - SV (393 KB)
- Italian - IT (393 KB)
- Korean - KR (393 KB)
- Portuguese - PT (393 KB)
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Handling Instructions (2659 KB)
References
Complete Stock Solution Preparation Table
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
| Optional Solvent | Concentration Solvent Mass | 1 mg | 5 mg | 10 mg | 25 mg |
|---|---|---|---|---|---|
| DMSO | 1 mM | 2.6707 mL | 13.3533 mL | 26.7065 mL | 66.7664 mL |
| 5 mM | 0.5341 mL | 2.6707 mL | 5.3413 mL | 13.3533 mL | |
| 10 mM | 0.2671 mL | 1.3353 mL | 2.6707 mL | 6.6766 mL | |
| 15 mM | 0.1780 mL | 0.8902 mL | 1.7804 mL | 4.4511 mL | |
| 20 mM | 0.1335 mL | 0.6677 mL | 1.3353 mL | 3.3383 mL | |
| 25 mM | 0.1068 mL | 0.5341 mL | 1.0683 mL | 2.6707 mL | |
| 30 mM | 0.0890 mL | 0.4451 mL | 0.8902 mL | 2.2255 mL | |
| 40 mM | 0.0668 mL | 0.3338 mL | 0.6677 mL | 1.6692 mL | |
| 50 mM | 0.0534 mL | 0.2671 mL | 0.5341 mL | 1.3353 mL | |
| 60 mM | 0.0445 mL | 0.2226 mL | 0.4451 mL | 1.1128 mL | |
| 80 mM | 0.0334 mL | 0.1669 mL | 0.3338 mL | 0.8346 mL | |
| 100 mM | 0.0267 mL | 0.1335 mL | 0.2671 mL | 0.6677 mL |
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