Certificate Of Analysis
Product Name Poly-L-aspartic acid sodium salt,
average Mv 15,000-50,000
Product Number 386790
Product Brand ALDRICH
CAS Number 31871-95-1
 
TEST SPECIFICATION LOT 05044TQ RESULTS
APPEARANCE WHITE POWDER
MOLECULAR WEIGHT MW= 36,300
DETERMINATION MW= 39,500 (LALLS)
ELEMENTAL ANALYSIS CARBON 31.76%
  HYDROGEN 3.57%
  NITROGEN 9.66%
OPTICAL ROTATION -31.4 DEGREES (1%, H2O @ 25 C)
THIN-LAYER ONE SPOT
TITRATION 0.49% H2O (WITH "KARL FISCHER" REAGENT)
ICP ASSAY NA= 15.2%
SOLUBILITY CLEAR COLORLESS SOLUTION (50 MG/ML, H2O)