Phenolphthalein Disodium Salt |
Catalog No.GF04776
One-Click Copy Product Info
|
Phenolphthalein Disodium Salt is an acid-base pH indicator.
Products are for research use only. Not for human use. We do not sell to patients.
Cas No.: 518-51-4
Sample solution is provided at 25 µL, 10mM.
_1-3.$$$39978408@51.jpg');)
_1-9.$$$38538795@65.jpg');)
_1-9.$$$39112701@51.jpg');)
_1-7.$$$37316672@70.jpg');)
_366-372.$$$36198801@70.jpg');)
.$$$38565142@65.jpg');)
_1867-1883.$$$33248023@67.jpg');)
_eads6055.$$$39977546@45.jpg');)
_eadm9805.$$$40080571@45.jpg');)
_eadj3020.$$$39666821@45.jpg');)
_1-20.$$$39757301@28.jpg');)
_1-24.$$$38898113@28.jpg');)
_273-287.$$$36806353@46.jpg');)
_1-16.$$$37156877@44.jpg');)
_1-19.$$$37460805@44.jpg');)
_1291-1307.$$$34518654@46.jpg');)
Phenolphthalein Disodium Salt is an acid-base pH indicator[1]. Phenolphthalein Disodium Salt can also be used as a probe to evaluate the adsorption and encapsulation capabilities of materials, particularly cyclodextrin materials[2].
References:
[1] Simplified procedures for water examination. M12. American Public Health Association; 2012.
[2] Rodríguez-Varillas S, Michel M, Garrido-Molina F, et al. Controlled release of carvacrol and curcumin: bio-based food packaging by synergism action of TEMPO-oxidized cellulose nanocrystals and cyclodextrin. Carbohydrate Polymers. 2024;329:121123.
These plans are based on literature, please modify them to meet your specific needs.
1. Acid-base pH indicator[1]
Dissolve 0.5g of Phenolphthalein Disodium Salt powder in 50mL of 95% ethanol or isopropanol. Dilute with distilled water to 100mL to obtain the phenolphthalein solution (pH=8.3 indicator). In titration, generally add 1-2 drops per 100mL of sample (until a faint pink endpoint appears).
2.Qualitative and quantitative characterization of cyclodextrin materials[2]
(1) Qualitative
1)Prepare the working solution by dissolving Phenolphthalein Disodium Salt in ethanol to a concentration of 35-40μM, and adjust the pH to 12.7.
2) Add 0.1g of the film sample to 10mL of the working solution. Since the sample's absorption of phenolphthalein changes over time, monitor the color change of the solution through visual observation and digital recording.
(2) Quantitative
1)Prepare calibration curve: Different concentrations of cyclodextrin solution are mixed with 2mL of phenolphthalein working solution (373.29μM) and 2mL of sodium carbonate solution (28mM). Dilute it to 25mL and the pH is adjusted to 12.7. The absorbance of the solution is analyzed at 553nm using a spectrophotometer. The concentration values are correlated with the absorbance values to obtain a calibration curve, which is then fitted using mathematical methods.
2)0.1g of the film sample is added to the system each time, the absorbance is measured at 553nm, and the cyclodextrin concentration in the sample is calculated according to the calibration equation.
References:
[1] Simplified procedures for water examination. M12. American Public Health Association; 2012.
[2] Rodríguez-Varillas S, Michel M, Garrido-Molina F, et al. Controlled release of carvacrol and curcumin: bio-based food packaging by synergism action of TEMPO-oxidized cellulose nanocrystals and cyclodextrin. Carbohydrate Polymers. 2024;329:121123.
| Cas No. | 518-51-4 | SDF | |
| Formula | C20H12Na2O4 | M.Wt | 362.29 |
| Solubility | Storage | Store at RT | |
| General tips | Please select the appropriate solvent to prepare the stock solution according to the
solubility of the product in different solvents; once the solution is prepared, please store it in
separate packages to avoid product failure caused by repeated freezing and thawing.Storage method
and period of the stock solution: When stored at -80°C, please use it within 6 months; when stored
at -20°C, please use it within 1 month. To increase solubility, heat the tube to 37°C and then oscillate in an ultrasonic bath for some time. |
||
| Shipping Condition | Evaluation sample solution: shipped with blue ice. All other sizes available: with RT, or with Blue Ice upon request. | ||
| Prepare stock solution | |||
|
1 mg | 5 mg | 10 mg |
| 1 mM | 2.7602 mL | 13.8011 mL | 27.6022 mL |
| 5 mM | 552 μL | 2.7602 mL | 5.5204 mL |
| 10 mM | 276 μL | 1.3801 mL | 2.7602 mL |
Step 1: Enter information below (Recommended: An additional animal making an allowance for loss during the experiment)
g
μL
Step 2: Enter the in vivo formulation (This is only the calculator, not formulation. Please contact us first if there is no in vivo formulation at the solubility Section.)
Calculation results:
Working concentration: mg/ml;
Method for preparing DMSO master liquid: mg drug pre-dissolved in μL DMSO ( Master liquid concentration mg/mL, Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug. )
Method for preparing in vivo formulation: Take μL DMSO master liquid, next addμL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL saline, mix and clarify.
Method for preparing in vivo formulation: Take μL DMSO master liquid, next add μL Corn oil, mix and clarify.
Note: 1. Please make sure the liquid is clear before adding the next solvent.
2. Be sure to add the solvent(s) in order. You must ensure that the solution obtained, in the previous addition, is a clear solution before proceeding to add the next solvent. Physical methods such as vortex, ultrasound or hot water bath can be used to aid dissolving.
3. All of the above co-solvents are available for purchase on the GlpBio website.
Quality Control & SDS
- View current batch:
- Purity: >98.00% Appearance: A solid
- COA (Certificate of Analysis)
- SDS (Safety Data Sheet)
- Datasheet
Average Rating: 5 (Based on Reviews and 30 reference(s) in Google Scholar.)