Chlorophenol red
Chlorophenol Red
CAS: 4430-20-0
Molecular Formula: C19H12Cl2O5S
Chlorophenol red - Names and Identifiers
| Name | Chlorophenol Red |
| Synonyms | CPR BETZ 0416 CHLOROPHENOL RED Chlorophenol Red DICHLOROPHENOLSULFONEPHTHALEIN dichlorophenolsulphonephthalein Chlorophenol red (0.04 in water) 3,3-Dichlorophenylsulfonphthalein 3,3'-DICHLOROPHENOL SULFONEPHTHALEIN 3',3'-DICHLOROPHENOLSULFONEPHTHALEIN 3',3''-DICHLOROPHENOLSULFONAPHTHALEIN 3',3''-DICHLOROPHENOLSULFONEPHTHALEIN 2-chlorophenol,1,1-dimethyl-3-phenyl-urea 4,4'-(1,1-dioxido-3H-2,1-benzoxathiole-3,3-diyl)bis(2-chlorophenol) alpha-(3-chloro-4-hydroxyphenyl)-alpha-(3-chloro-4-oxocyclohexa-2,5-dienylidene)toluene-2-sulphonicacid |
| CAS | 4430-20-0 |
| EINECS | 224-619-2 |
| InChI | InChI=1/C9H12N2O.C6H5ClO/c1-11(2)9(12)10-8-6-4-3-5-7-8;7-5-3-1-2-4-6(5)8/h3-7H,1-2H3,(H,10,12);1-4,8H |
Chlorophenol red - Physico-chemical Properties
| Molecular Formula | C19H12Cl2O5S |
| Molar Mass | 423.27 |
| Density | 1.4641 (estimate) |
| Melting Point | 261 °C |
| Boling Point | 583.0±50.0 °C(Predicted) |
| Flash Point | 244.2°C |
| Water Solubility | insoluble |
| Solubility | Solubility Sparingly soluble in water; soluble in ethanol |
| Vapor Presure | 7.59E-10mmHg at 25°C |
| Appearance | Liquid |
| Color | White to cream |
| Maximum wavelength(λmax) | ['572nm'] |
| BRN | 354053 |
| pKa | 6.0(at 25℃) |
| Storage Condition | Store below +30°C. |
| Sensitive | Easily absorbing moisture |
| MDL | MFCD00005877 |
| Physical and Chemical Properties | Yellow-brown powder. Melting point 261-262 °c. Soluble in ethanol and dilute alkali, water-soluble, insoluble in ether and benzene. |
| Use | Acid-base indicator, color change range pH 4.8 (yellow) ~ 6.4 (purple red). Adsorption indicator. Determination of chlorine and bromine in mercury quantitative titration (extremely sensitive to bromine, from yellow to purple). Food deterioration inspection. Indicator of gamma rays, X-rays and fast neutron dosimeters (can indicate the amount of trichloroethylene or chloroform decomposed by hydrochloric acid after irradiation) |
Chlorophenol red - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S37/39 - Wear suitable gloves and eye/face protection S36 - Wear suitable protective clothing. |
| WGK Germany | 3 |
| TSCA | Yes |
| HS Code | 29349990 |
Chlorophenol red - Introduction
Soluble in dilute caustic, carbonate solution and ammonia is red, but after acidification, the color turns yellow, and precipitates, soluble in ethanol, slightly soluble in water, insoluble in ether and benzene. It's irritating.
Last Update：2022-10-16 17:25:15
Chlorophenol red - Reference Information
| pH indicator color change ph range | 4.8(yellow)-6.8(red) |
| main applications | Waveguide, sol-gel matrix, display device, tin electroplating process, inks, lubricants, detergents, preservation of cut flowers, cosmetics, identifying fresh and stale rice, determining acidity in wine, food storage, detecting acid bacteria, enzyme me assays, diagnosis of bacterial and fungal infection, oral hygiene products |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| use | acid-base indicator. |
| production method | o-sulfobenzoic anhydride and o-chlorophenol are heated at 130 ℃ to obtain a crude product, and then recrystallized with glacial acetic acid. |
Last Update：2024-04-09 02:00:08
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