85707
Sigma

2,5-Dihydroxybenzoic acid

puriss. p.a., matrix substance for MALDI-MS, >99.0% (HPLC)

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Synonym

DHB

Gentisic acid

Hydroquinonecarboxylic acid

Molecular Formula

(HO)₂C₆H₃CO₂H

Molecular Weight

154.12

CAS Number

490-79-9

Beilstein Registry Number

2209119

MDL number

MFCD00002460

EG/EC Number

207-718-5

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Descriptions

Application

Most commonly used matrix for carbohydrates. For MALDI-MS of free neutral glycans. Produces [M+Na]⁺ ion; may show a weaker [M+K]⁺ ion. Other species may be generated by the addition of the appropriate inorganic salt.¹

Properties

grade

matrix substance for MALDI-MS

puriss. p.a.

assay

>99.0% (HPLC)

200-205 °C

204-208 °C(lit.)

cation traces

Ba: ≤5 mg/kg

Ca: ≤5 mg/kg

Cd: ≤5 mg/kg

Co: ≤5 mg/kg

Cr: ≤5 mg/kg

Cu: ≤5 mg/kg

K: ≤5 mg/kg

Mg: ≤5 mg/kg

Mn: ≤5 mg/kg

Na: ≤5 mg/kg

Ni: ≤5 mg/kg

Pb: ≤5 mg/kg

Zn: ≤5 mg/kg

abs.

extinction/337 nm >2000

References

Cited Reference

1. Karas, M., et al., , Matrix-assisted laser desorption/ionization mass spectrometry with additives to 2,5-dihydroxybenzoic acid. Org. Mass Spectrom. 28, 1476-1481, (1993)

Merck

Merck 13,4409

Beilstein

Beil. 10,IV,1441

reference

Aldrich MSDS 1, 706:B / Corp MSDS 1 (1), 1272:A / FT-IR 2 (2), 2688:D / FT-IR 1 (2), 216:C / FT-NMR 1 (2), 1116:C / IR-Spectra (3), 971:F / IR-Spectra (2), 850:G / NMR-Reference 2 (2), 212:C / RegBook 1 (2), 1807:A / Sax 6, 1472 / Sigma FT-IR 1 (1), 664:A / Structure Index 1, 289:B:2

Safety

Hazard Codes

Risk Statements

22-36/37/38

Safety Statements

26-36

WGK Germany

RTECS

LY3850000

Related Categories

... Glycan Labeling and Analysis > Matricies for Mass Spectroscopy Analysis of Glycans

... Mass Spectrometry (MS) & LC-MS > Reagents for Mass Spectrometry (MS)

MSDS

Certificate of Analysis

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