Specification Sheet

Product Name
Poly-L-aspartic acid sodium salt mol wt 15,000-50,000

Product Number
P6762

Product Brand
SIGMA

CAS Number
31871-95-1

Molecular Weight

Test

Specification

APPEARANCEWHITE TO OFF-WHITE POWDER
SOLUBILITYCLEAR COLORLESS TO FAINT YELLOW SOLUTION AT 50MG/ML OF WATER
WATER BY KARL FISCHER< OR = 3%
CARBON *27.7% TO 38.6% CARBON
NITROGEN *7.4% TO 11.0% NITROGEN
ICP-ATOMIC EMISSION *13.3% TO 17.2% SODIUM
SPECIFIC ROTATION-15.0 TO -28.2 (C = 1 IN WATER AT 25 DEG C)
DEGREE OF POLYMERIZATION BY VISCOSITY200 TO 298
MOLECULAR WEIGHT BY VISCOSITY15,000 TO 50,000
DEGREE OF POLYMERI- ZATION BY MALLS156 TO 222
MOL WT BY MULTI ANGLE LASER LIGHT SCATTERING8,100 TO 44,500
PURITY BY THIN LAYER CHROMATOGRAPHY (UNHYDROLYZED)> OR = 98.0%
PURITY BY THIN LAYER CHROMATOGRAPHY (HYDROLYZED)> OR = 95.0%
RECOMMENDED RETEST3 YEARS
DOCUMENT #P6762/09/23/08/5

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