Specification Sheet
Product Name Nitrilotriacetic acid,
BioUltra, ≥99.0% (T)
Product Number 72559
Product Brand SIGMA
CAS Number 139-13-9
Molecular Weight 191.14
 
TEST SPECIFICATION
APPEARANCE (COLOR) Colorless or White
APPEARANCE (FORM) Powder
TITRATION (T) NAOH 1M 99.0 - 101.0 %
LOSS ON DRYING ≤ 0.1 %
SULFATED ASH ≤ 0.1 %
INFRARED SPECTRUM CONFORMS TO STRUCTURE
METAL TRACE ANALYSIS (ICP) CORRESPONDS TO REQUIREMENTS
ALUMINIUM (ICP) ≤ 20 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) ≤ 20 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) ≤ 500 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) ≤ 0.1 mg/kg
CHLORIDE (CL) ≤ 100 mg/kg
SOLUBILITY (METHOD) 0.57 G IN 30 ML 1M NAOH (0.1M)
APPEARANCE (SOLUTION) CLEAR COLORLESS
RESIDUE (FILTER TEST) NO RESIDUE
UV - ABS. AT 260 NM ≤ 1.5
UV - ABS. AT 280 NM ≤ 0.05
RECOMMENDED RETEST PERIOD 42 MONTHS