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
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 is widely used as a pH indicator in biology and medicine. Its other applications include • in the assay to estimate total acidity in vinegar • in the assessment of penetration of sodium hydroxide 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 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 |
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 |