199524

Chlorophenol Red

indicator grade

• Synonym(s): 3′,3′-Dichlorophenolsulfonaphthalein
• Empirical Formula (Hill Notation): C₁₉H₁₂Cl₂O₅S
• CAS Number: 4430-20-0
• Molecular Weight: 423.27
• Beilstein: 354053
• EC Number: 224-619-2
• MDL number: MFCD00005877
• UNSPSC Code: 12171500
• PubChem Substance ID: 24851922
• NACRES: NA.47

Properties

• grade: indicator grade
• form: powder, crystals or chunks
• color: dark brown
• pH: 4.8-6.7, yellow to violet
• solubility: 95% ethanol: 10 mg/mL
• λmax: 572 nm
• ε (extinction coefficient): ≥12000 at 295-301 nm in 0.1 M NaOH; ≥45000 at 573-579 nm in 0.1 M NaOH; ≥5000 at 368-374 nm in 0.1 M NaOH
• application(s): diagnostic assay manufacturing; hematology; histology
• storage temp.: room temp
• SMILES string: Oc1ccc(cc1Cl)C2(OS(=O)(=O)c3ccccc23)c4ccc(O)c(Cl)c4
• InChI: 1S/C19H12Cl2O5S/c20-14-9-11(5-7-16(14)22)19(12-6-8-17(23)15(21)10-12)13-3-1-2-4-18(13)27(24,25)26-19/h1-10,22-23H
• InChI key: WWAABJGNHFGXSJ-UHFFFAOYSA-N

Description

Biochem/physiol Actions

Chlorophenol red is a pH indicator. It is used as an optical transducer of acetyl cholinesterase inhibition by the analytes. Chlorophenol red is also used to selectively determine chlorine dioxide in drinking water. It has been used in the novel assay to detect transformed protoplast-derived Zea mays colonies on Phosphinothricin (PPT).

Safety Information

• Pictograms: GHS07
• Signal Word: Warning
• Hazard Statements: H315,H319,H335
• Precautionary Statements: P261 - P264 - P271 - P280 - P302 + P352 - P305 + P351 + P338
• Hazard Classifications: Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3
• Target Organs: Respiratory system
• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves