| Identification |
| Name: | 4-(2-Pyridylazo)resorcinol monosodium salt hydrate |
| Synonyms: | 3-hydroxy-4-(pyridin-2-ylhydrazinylidene)cyclohexa-2,5-dien-1-one;PAR INDICATOR GR;PAR [ Mono Sod ] Indicator; |
| CAS: | 16593-81-0 |
| EINECS: | 236-339-8 |
| Molecular Formula: | C11H8N3NaO2.H2O |
| Molecular Weight: | 255.20 |
| InChI: | InChI=1/C11H9N3O2.Na.H2O/c15-8-4-5-9(10(16)7-8)13-14-11-3-1-2-6-12-11;;/h1-7,15-16H;;1H2/q;+1; |
| Molecular Structure: |
![(C11H8N3NaO2.H2O) 3-hydroxy-4-(pyridin-2-ylhydrazinylidene)cyclohexa-2,5-dien-1-one;PAR INDICATOR GR;PAR [ Mono Sod ] ...](https://img.guidechem.com/casimg/16593-81-0.gif) |
| Properties |
| Melting Point: | 253 ºC ( 487ºF) |
| Stability: | Stable. Incompatible with strong oxidizing agents, strong bases, strong acids, acid chlorides, acid anhydrides. |
| Appearance: | deep brown powder |
| Safety Data |
| Hazard Symbols |
Xi: Irritant
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