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06788 Sigma-Aldrich

2-(4-Hydroxyphenylazo)benzoic acid

matrix substance for MALDI-MS, ≥99.5% (HPLC), Ultra pure

Synonym: 2-(4′-Hydroxybenzeneazo)benzoic acid, 4′-Hydroxyazobenzene-2-carboxylic acid, HABA, HBABA

  • CAS Number 1634-82-8

  • Linear Formula HOC6H4N=NC6H4CO2H

  • Molecular Weight 242.23

  •  Beilstein Registry Number 1842696

  •  EC Number 216-655-2

  •  MDL number MFCD00002428

  •  PubChem Substance ID 24845972

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Properties

Related Categories Analytical Reagents, Analytical Reagents for General Use, Analytical/Chromatography, E-H, Puriss p.a., Mass Spectrometry (MS),
grade   matrix substance for MALDI-MS
InChI Key   DWQOTEPNRWVUDA-CCEZHUSRSA-N
assay   ≥99.5% (HPLC)
mp   204-208 °C(lit.)
  204-208 °C
solubility   ethanol: soluble20 mg/mL, clear
cation traces   Ag: ≤1.0 mg/kg
  Al: ≤1.0 mg/kg
  B: ≤1.0 mg/kg
  Ba: ≤1.0 mg/kg
  Be: ≤1.0 mg/kg
  Bi: ≤1.0 mg/kg
  Ca: ≤1.0 mg/kg
  Cd: ≤1.0 mg/kg
  Co: ≤1.0 mg/kg
  Cr: ≤1.0 mg/kg
  Cu: ≤1.0 mg/kg
  Fe: ≤1.0 mg/kg
  Ge: ≤1.0 mg/kg
  K: ≤5 mg/kg
  Li: ≤1.0 mg/kg
  Mg: ≤1.0 mg/kg
  Mn: ≤1.0 mg/kg
  Na: ≤5 mg/kg
  Ni: ≤1.0 mg/kg
  Pb: ≤1.0 mg/kg
  Sn: ≤1.0 mg/kg
  Sr: ≤1.0 mg/kg
  Tl: ≤1.0 mg/kg
  Zn: ≤1.0 mg/kg
absorption   absorption/337 nm ≥2000 (mol. absorption)

Description

Other Notes

Same product — same quality — now Sigma-Aldrich brand

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Safety & Documentation

Safety Information

Symbol 
GHS07  GHS07
Signal word 
Warning
Hazard statements 
Precautionary statements 
Personal Protective Equipment 
RIDADR 
NONH for all modes of transport
WGK Germany 
3
Protocols & Articles

Articles

Ultra-pure MALDI Matrices

One of the most important aspects of the ultra-pure MALDI matrix substances from Sigma-Aldrich is their ability to dissolve rapidly and completely; a brief vortex mixing is typically sufficient. Actu...
Monika Baeumle, Alex Rueck
Analytix Volume 7 Article 5
Keywords: Crystallization, Digestions, High performance liquid chromatography, Mass spectrometry, Phase transitions, Proteomics, Sample preparations, Spectroscopy

Peer-Reviewed Papers
15

References

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54793 2-(4-Hydroxyphenylazo)benzoic acid, matrix substance for MALDI-MS, ≥99.5%

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