Specification Sheet
Product Name Boric acid,
BioUltra, for molecular biology, ≥99.5% (T)
Product Number 15663
Product Brand SIGMA
CAS Number 10043-35-3
Molecular Weight 61.83
 
TEST SPECIFICATION
APPEARANCE (COLOR) Colorless or White
APPEARANCE (FORM) Powder or Crystals
TITRATION (T) NAOH 1M 99.5 - 101.0 %
LOSS ON DRYING ≤ 0.5 %
METAL TRACE ANALYSIS (ICP) CORRESPONDS TO REQUIREMENTS
ALUMINIUM (ICP) ≤ 5 mg/kg
BARIUM (ICP) ≤ 5 mg/kg
BISMUTH (ICP) ≤ 5 mg/kg
CALCIUM (ICP) ≤ 10 mg/kg
CADMIUM (ICP) ≤ 5 mg/kg
COBALT (ICP) ≤ 5 mg/kg
CHROMIUM (ICP) ≤ 5 mg/kg
COPPER (ICP) ≤ 5 mg/kg
IRON (ICP) ≤ 5 mg/kg
POTASSIUM (ICP) ≤ 50 mg/kg
LITHIUM (ICP) ≤ 5 mg/kg
MAGNESIUM (ICP) ≤ 5 mg/kg
MANGANESE (ICP) ≤ 5 mg/kg
MOLYBDENUM (ICP) ≤ 5 mg/kg
SODIUM (ICP) ≤ 50 mg/kg
NICKEL (ICP) ≤ 5 mg/kg
LEAD (ICP) ≤ 5 mg/kg
STRONTIUM (ICP) ≤ 5 mg/kg
ZINC (ICP) ≤ 5 mg/kg
ARSENIC TRACES (MHS-AAS) ≤ 0.5 mg/kg
CHLORIDE (CL) ≤ 5 mg/kg
PHOSPHATE (PO4) ≤ 5 mg/kg
SULFATE (SO4) ≤ 5 mg/kg
VARIOUS GUARANTEE LABEL TEST non-volatile substances in MeOH/HCl ≤ 500 mg/kg
EXTRANEOUS ACTIVITIES DNAses, RNAses, Proteases, Phosphatases Not Detectable
SOLUBILITY (METHOD) 1M IN H2O HOT
APPEARANCE (SOLUTION) CLEAR COLORLESS
PH (SOLUTION) 3.6 - 4.4
RESIDUE (FILTER TEST) NO RESIDUE
UV - ABS. AT 260 NM ≤ 0.015
UV - ABS. AT 280 NM ≤ 0.010
RECOMMENDED RETEST PERIOD 72 MONTHS