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/REAXYS Number: 354053
• EC Number: 224-619-2
• MDL number: MFCD00005877
• UNSPSC Code: 12171500
• PubChem Substance ID: 24851922
• NACRES: NA.47

Properties

• grade: indicator grade
• Quality Level: 200
• 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.[1] Chlorophenol red is also used to selectively determine chlorine dioxide in drinking water.[2] It has been used in the novel assay to detect transformed protoplast-derived Zea mays colonies on Phosphinothricin (PPT).[3]

Safety Information

• pictograms: GHS07
• signalword: Warning
• hcodes: H315,H319,H335
• pcodes: 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: 11 - Combustible Solids
• wgk_germany: WGK 3
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: dust mask type N95 (US), Eyeshields, Gloves