Specification Sheet
Product Name 2-(4-Hydroxyphenylazo)benzoic acid,
matrix substance for MALDI-MS, ≥99.5%
Product Number 54793
Product Brand SIAL
CAS Number 1634-82-8
Molecular Weight 242.23
 
TEST SPECIFICATION
APPEARANCE (COLOR) Orange to Dark Orange
APPEARANCE (FORM) Powder
TITRATION (T) NAOH 0.1M 99.5 - 100.5 %
PURITY (HPLC AREA %) ≥ 99.5 %
MELTING POINT 204 - 208 C
SOLUBILITY (COLOR) Orange to Very Dark Orange
SOLUBILITY (TURBIDITY) Clear
SOLUBILITY (METHOD) 0.2G IN 10ML ETHANOL
LOSS ON DRYING ≤ 0.2 %
INFRARED SPECTRUM CONFORMS TO STRUCTURE
TEST BY UV SPECTROSCOPY CORRESPONDS TO REQUIREMENTS
METAL TRACE ANALYSIS (ICP) CORRESPONDS TO REQUIREMENTS
CALCIUM (ICP) ≤ 10 mg/kg
CADMIUM (ICP) ≤ 5.0 mg/kg
COBALT (ICP) ≤ 5.0 mg/kg
CHROMIUM (ICP) ≤ 5.0 mg/kg
COPPER (ICP) ≤ 5.0 mg/kg
IRON (ICP) ≤ 50 mg/kg
POTASSIUM (ICP) ≤ 50 mg/kg
MAGNESIUM (ICP) ≤ 5.0 mg/kg
MANGANESE (ICP) ≤ 5.0 mg/kg
SODIUM (ICP) ≤ 100 mg/kg
NICKEL (ICP) ≤ 5.0 mg/kg
LEAD (ICP) ≤ 5.0 mg/kg
ZINC (ICP) ≤ 5.0 mg/kg
RECOMMENDED RETEST PERIOD 72 MONTHS