2-(4-Hydroxyphenylazo)benzoic acid Structure

2-(4-Hydroxyphenylazo)benzoic acid

Chemical Properties

Melting point 204-208 °C(lit.)
Boiling point 385.05°C (rough estimate)
Density  1.2480 (rough estimate)
refractive index  1.5300 (estimate)
storage temp.  Store below +30°C.
solubility  ethanol: 20 mg/mL, clear
form  powder to crystal
pka 3.40±0.36(Predicted)
color  Light yellow to Brown
BRN  1842696
Stability Stable. Incompatible with strong oxidizing agents.
InChI 1S/C13H10N2O3/c16-10-7-5-9(6-8-10)14-15-12-4-2-1-3-11(12)13(17)18/h1-8,16H,(H,17,18)/b15-14+
InChIKey DWQOTEPNRWVUDA-CCEZHUSRSA-N
SMILES Oc1ccc(cc1)\N=N\c2ccccc2C(O)=O
CAS DataBase Reference 1634-82-8(CAS DataBase Reference)
EPA Substance Registry System Benzoic acid, 2-[(4-hydroxyphenyl)azo]- (1634-82-8)
Absorption ≥2000 at 337nm (mol. absorption)
UNSPSC Code 12352100
NACRES NA.22

Safety

Symbol(GHS) Exclamation Mark (GHS07)
Signal wordWarning
Hazard statements H315-H319-H335
Precautionary statements P280a-P304+P340-P405-P501a-P261-P305+P351+P338
Hazard Codes  Xi
Risk Statements  36/37/38
Safety Statements  26-36
WGK Germany  3
Hazard Note  Irritant
TSCA  TSCA listed
HS Code  29270000
Storage Class 11 - Combustible Solids
NFPA 704:
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