3-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one
Synonym(s):3-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one;4-(3-Methyl-5-oxo-2-pyrazolin-1-yl)benzenesulfonic acid
- CAS NO.：89-36-1
- Empirical Formula: C10H10N2O4S
- Molecular Weight: 254.26
- MDL number: MFCD00020756
- EINECS: 201-901-3
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-01-13 11:13:45
What is 3-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one?
Chemical properties
BEIGE POWDER
The Uses of 3-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one
1-(4-Sulfophenyl)-3-methyl-5-pyrazolone (4-(3-methyl-5-oxo-2-pyrazolin-1-yl) benzoic acid) was used for pre-column derivatization of carbohydrates. It was also used as derivatization reagent in determination of oligosides, mannose and galactose obtained by degradation of galactomannans.
Definition
ChEBI: 4-(3-Methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)benzenesulfonic acid is an organosulfur compound and a sulfonic acid derivative.
Properties of 3-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one
| Melting point: | >252 °C (dec.) (lit.) |
| Density | 1.4456 (rough estimate) |
| vapor pressure | 0.001Pa at 20℃ |
| refractive index | 1.5650 (estimate) |
| storage temp. | Sealed in dry,Room Temperature |
| form | Powder |
| pka | pKa 4.90 (H2O
t = 37
I = 0.15) (Uncertain) |
| color | White to Orange to Green |
| Water Solubility | 5 g/L (20 ºC) |
| BRN | 619424 |
| CAS DataBase Reference | 89-36-1(CAS DataBase Reference) |
| EPA Substance Registry System | Benzenesulfonic acid, 4-(4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)- (89-36-1) |
Safety information for 3-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one
| Signal word | Danger |
| Pictogram(s) |
 Corrosion Corrosives GHS05 |
| GHS Hazard Statements |
H314:Skin corrosion/irritation |
| Precautionary Statement Codes |
P260:Do not breathe dust/fume/gas/mist/vapours/spray. P280:Wear protective gloves/protective clothing/eye protection/face protection. P363:Wash contaminated clothing before reuse. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for 3-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one
| InChIKey | CWJQQASJVVAXKL-UHFFFAOYSA-N |
3-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one manufacturer
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