Phenolphthalein
SIAL/105945 - ACS reagent
Synonym: 3,3-
CAS Number: 77-09-8
Empirical Formula (Hill Notation): C20H14O4
Molecular Weight: 318.32
EC Number: 201-004-7
MDL Number: MFCD00005913
Linear Formula: C20H14O4
Product Type: Chemical
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material. This image depicts SKU: 105945-100G
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material. This image depicts SKU: 105945-500G
| λmax | 374 nm (2nd) |
| 552 nm | |
| application(s) | diagnostic assay manufacturing hematology histology |
| density | 1.27 g/cm3 at 32 °C |
| form | powder |
| grade | ACS reagent |
| InChI | 1S/C20H14O4/c21-15-9-5-13 |
| InChI key | KJFMBFZCATUALV-UHFFFAOYSA |
| mp | 261-263 °C (lit.) |
| Quality Level | 200  |
| SMILES string | Oc1ccc(cc1)C2(OC(=O)c3ccc |
| solubility | acetone: soluble |
| storage temp. | room temp |
| technique(s) | titration: suitable |
| visual transition interval | 8.0-10, colorless to red |
| 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. |
| 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. |
| Packaging: | 100, 500 g in poly bottle |
| Packaging: | 2.5 kg in poly drum |
| Principle: | 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. |
| Symbol |   GHS07,GHS08 |
| Signal word | Danger |
| Hazard statements | H315 - H341 - H350 - H361f |
| Precautionary statements | P202 - P264 - P280 - P302 + P352 - P308 + P313 - P332 + P313 |
| Hazard Codes | T |
| Risk Statements | 45-62-68 |
| Safety Statements | 53-45 |
| RIDADR | NONH for all modes of transport |
| WGK Germany | WGK 3 |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| mp | 261-263 °C (lit.) |
| Density | 1.27 g/cm3 at 32 °C |
| Storage Temp. | room temp |
| Colour Index Number | 764 |
| UNSPSC | 12171500 |