Phenol Red
SIAL/114529 - ACS reagent
Synonym: Phenolsulfonphthalein
CAS Number: 143-74-8
Empirical Formula (Hill Notation): C19H14O5S
Molecular Weight: 354.38
EC Number: 205-609-7
MDL Number: MFCD00003552
Linear Formula: C19H14O5S
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: 114529-25G
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: 114529-5G
| ε (extinction coefficient) | ≥10000 at 288-294 nm in H2O |
| ≥55000 at 555-561 nm in H2O | |
| ≥7000 at 357-363 nm in H2O | |
| λmax | 360 nm |
| 557 nm (2nd) | |
| application(s) | diagnostic assay manufacturing hematology histology |
| clarity of soln | passes test |
| form | powder |
| grade | ACS reagent |
| InChI | 1S/C19H14O5S/c20-15-9-5-1 |
| InChI key | BELBBZDIHDAJOR-UHFFFAOYSA |
| Quality Level | 200  |
| SMILES string | Oc1ccc(cc1)C2(OS(=O)(=O)c |
| solubility | water: 0.77 g/L at 100 °C |
| storage temp. | room temp |
| technique(s) | titration: suitable |
| visual transition interval | 6.8-8.2, yellow to red |
| Application: | Phenol red is commonly used as a pH indicator in biology and medicine. It is incorporated into microbiological culture media for the identification of Escherichia coli strains. Its clinical diagnostic applications include the investigation of gastric and duodenal ulcers and the assessment of tear function in ophthalmology. Phenol red is also used as a tracer to assess the permeability of the ileal mucosal membrane and to assess bacterial leakage through root-filling materials in dentistry. Phenol Red has been used for the preparation of phenol red gavage meal for measurement of gastric emptying in rats. |
| Application: | Suitable for use as a pH indicator. |
| Biochem/physiol Actions: | Phenol Red is a pH indicator which changes color from yellow to red. |
| General description: | Phenol Red is a phenolsulfonphthalein compound. It is present as a sulfonated hydroxyquinone in weakly acidic aqueous solutions. In alkaline solutions, the dye forms a hydrophilic dianion (a small, red anion that has a larger conjugated system than the yellow hydroxyquinone). |
| Packaging: | 5, 25 g in glass bottle |
| Symbol |  GHS07 |
| Signal word | Warning |
| Hazard statements | H315 - H335 |
| Precautionary statements | P261 - P264 - P271 - P280 - P302 + P352 - P304 + P340 + P312 |
| Hazard Codes | Xi |
| Risk Statements | 36/37/38 |
| Safety Statements | 26 |
| RIDADR | NONH for all modes of transport |
| WGK Germany | WGK 3 |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| Storage Temp. | room temp |
| UNSPSC | 12171500 |