Chlorophenol Red
Synonym(s):3′,3′-Dichlorophenolsulfonaphthalein;3,3′′-Dichlorophenolsulfonphthalein;Chlorophenol red
- CAS NO.：4430-20-0
- Empirical Formula: C19H12Cl2O5S
- Molecular Weight: 423.27
- MDL number: MFCD00005877
- EINECS: 224-619-2
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-01-13 11:18:56
What is Chlorophenol Red?
Chemical properties
reddish-brown to green or brown powder
The Uses of Chlorophenol Red
Chlorophenol Red; Dyes and metabolites. Is used in detection of nicotine, cannabinoids and drugs of abuse on vaping device surfaces and vaping liquid formulations.
What are the applications of Application
Chlorophenol Red is used to detect chlorine dioxide in drinking water
Purification Methods
Crystallise the dye from glacial acetic acid. It is yellow at pH 4.8 and violet at pH 6.7. [Beilstein 19/3 V 458.]
Properties of Chlorophenol Red
| Melting point: | 261 °C |
| Boiling point: | 583.0±50.0 °C(Predicted) |
| Density | 1.4641 (estimate) |
| storage temp. | Store below +30°C. |
| solubility | Solubility Sparingly soluble in water; soluble in ethanol |
| form | Liquid |
| pka | 6.0(at 25℃) |
| color | White to cream |
| PH Range | 4.8(yellow)-6.8(red) |
| Water Solubility | insoluble |
| λmax | 572nm |
| BRN | 354053 |
| Major Application | 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 lactic acid bacteria, enzyme assays, diagnosis of bacterial and fungal infection, oral hygiene products |
| CAS DataBase Reference | 4430-20-0(CAS DataBase Reference) |
| EPA Substance Registry System | Phenol, 4,4'-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis[2-chloro- (4430-20-0) |
Safety information for Chlorophenol Red
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P280:Wear protective gloves/protective clothing/eye protection/face protection. P304+P340:IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P405:Store locked up. |
Computed Descriptors for Chlorophenol Red
Chlorophenol Red manufacturer
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