Specification Sheet
Product Name
2,5-Dihydroxybenzoic acid suitable for matrix substance for MALDI-MS, >99.0% (HPLC)
Product Number
85707
Product Brand
sigma
CAS Number
490-79-9
Molecular Weight
154.12
Test | Specification |
|---|---|
| APPEARANCE (COLOR) | White to Faint Yellow to Faint Beige |
| APPEARANCE (FORM) | Powder or Crystals |
| TITRATION (T) NAOH 0.1M | 99.0 - 101.0 % |
| PURITY (HPLC AREA %) | ≥ 99.0 % |
| MELTING POINT | 200 - 207 C |
| SOLUBILITY (COLOR) | Colorless to Almost Colorless |
| SOLUBILITY (TURBIDITY) | Clear |
| SOLUBILITY (METHOD) | 0.1G IN 10ML METHANOL |
| PROTON NMR SPECTRUM | CONFORMS TO STRUCTURE |
| TEST BY UV SPECTROSCOPY | CORRESPONDS TO REQUIREMENTS |
| METAL TRACE ANALYSIS (ICP) | CORRESPONDS TO REQUIREMENTS |
| BARIUM (ICP) | ≤ 5 mg/kg |
| CALCIUM (ICP) | ≤ 5 mg/kg |
| CADMIUM (ICP) | ≤ 5 mg/kg |
| COBALT (ICP) | ≤ 5 mg/kg |
| CHROMIUM (ICP) | ≤ 5 mg/kg |
| COPPER (ICP) | ≤ 5 mg/kg |
| POTASSIUM (ICP) | ≤ 5 mg/kg |
| MAGNESIUM (ICP) | ≤ 5 mg/kg |
| MANGANESE (ICP) | ≤ 5 mg/kg |
| SODIUM (ICP) | ≤ 5 mg/kg |
| NICKEL (ICP) | ≤ 5 mg/kg |
| LEAD (ICP) | ≤ 5 mg/kg |
| ZINC (ICP) | ≤ 5 mg/kg |
| RECOMMENDED RETEST PERIOD | 54 MONTHS |