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4-(2-Pyridylazo)resorcinol monosodium salt monohydrate

metal indicator Reag. Ph Eur

Synonym(s):

4-(2-Pyridylazo)resorcinol monosodium salt monohydrate, PAR

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About This Item

Empirical Formula (Hill Notation):
C11H8N3NaO2 · xH2O
CAS Number:
16593-81-0
Molecular Weight:
237.19 (anhydrous basis)
UNSPSC Code:
12352107
EC Index Number:
236-339-8
NACRES:
NB.21

Agency

reag. Ph. Eur.

Quality Level

100

form

solid

pH

9.8 (20 °C, 10 g/L in H2O)

solubility

38 g/L

bulk density

630 kg/m3

storage temp.

2-30°C

InChI

1S/C11H9N3O2/c15-8-4-5-9(10(16)7-8)13-14-11-3-1-2-6-12-11/h1-7,16H,(H,12,14)/b13-9+

InChI key

VLCAILLZPUINNF-UKTHLTGXSA-N

Related Categories

Analysis Note

Assay (Perchloric acid titration, calc. on anhydrous substance): ≥ 99
Appearance of solution: passes test
Water (according to Karl Fischer): 7 - 8
Suitability as indicator (for metal titration): passes test

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

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