4-(2-PYRIDYLAZO)RESORCINOL
Synonym(s):4-(2′-Pyridylazo)-resorcinol;4-(2-Pyridinylazo)-1,3-dihydroxybenzene;PAR
- CAS NO.：1141-59-9
- Empirical Formula: C11H9N3O2
- Molecular Weight: 215.21
- MDL number: MFCD00006256
- EINECS: 214-528-6
- SAFETY DATA SHEET (SDS)
- Update Date: 2025-04-03 08:22:01
What is 4-(2-PYRIDYLAZO)RESORCINOL?
Chemical properties
ORANGE POWDER
The Uses of 4-(2-PYRIDYLAZO)RESORCINOL
4-(2-Pyridylazo)resorcinol is used in studies of zinc release from Escherichia coli aspartate transcarbamoylase. It is used in cloud point extraction of copper, zinc, cadmium, and nickel in water samples. It is used in the chelate titration of aluminum, mercury, lead and nickel. It is employed as reagent in the colorimetric analysis of gold, cobalt, chromium, iron.
General Description
for synthesis
Purification Methods
Purify PAR as the sodium salt by recrystallisation from 1:1 EtOH/water. Purity can be checked by TLC using a silica gel plate and a mixed solvent (n-BuOH:EtOH:2M NH3; 6:2:2). [Beilstein 22 I 694, 22 III/IV 7074, 22/14 V 619.]
Properties of 4-(2-PYRIDYLAZO)RESORCINOL
| Melting point: | 192-202 °C(lit.) |
| Boiling point: | 355.48°C (rough estimate) |
| Density | 1.2579 (rough estimate) |
| refractive index | 1.4930 (estimate) |
| storage temp. | room temp |
| solubility | DMSO (Slightly), Methanol (Slightly) |
| pka | 8.18±0.35(Predicted) |
| form | Powder |
| color | Orange |
| Water Solubility | Soluble in water (partly), and ethanol (slightly). Insoluble in ether, and low-polarity solvents. |
| BRN | 184665 |
| CAS DataBase Reference | 1141-59-9(CAS DataBase Reference) |
| EPA Substance Registry System | 1,3-Benzenediol, 4-(2-pyridinylazo)- (1141-59-9) |
Safety information for 4-(2-PYRIDYLAZO)RESORCINOL
| Signal word | Danger |
| Pictogram(s) |
 Skull and Crossbones Acute Toxicity GHS06  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. P270:Do not eat, drink or smoke when using this product. P271:Use only outdoors or in a well-ventilated area. 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. P403+P233:Store in a well-ventilated place. Keep container tightly closed. P501:Dispose of contents/container to..… |
Computed Descriptors for 4-(2-PYRIDYLAZO)RESORCINOL
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