Specification Sheet
Product Name L-Tryptophan,
BioUltra, ≥99.5% (NT)
Product Number 93659
Product Brand SIGMA
CAS Number 73-22-3
Molecular Weight 204.23
 
TEST SPECIFICATION
APPEARANCE (COLOR) WHITE
APPEARANCE (FORM) POWDER TO FINE CRYSTALS
PURITY BY PERCHLORIC ACID TITRATION MINIMUM 99.5%
PURITY BY THIN LAYER CHROMATOGRAPHY MINIMUM 99.0% REL
SPECIFIC ROTATION -31.5 +/- 1.0 DEG (C=1, WATER AT 20 DEG C)
LOSS ON DRYING NMT 0.1%
RESIDUE ON IGNITION NMT 0.1%
IR SPECTRUM CONSISTENT WITH STRUCTURE
ICP-ATOMIC EMISSION METAL TRACE ANALYSIS CORRESPONDS
ALUMINUM BY ICP NMT 5 MG/KG
BARIUM BY ICP NMT 5 MG/KG
BISMUTH BY ICP NMT 5 MG/KG
CALCIUM BY ICP NMT 10 MG/KG
CADMIUM BY ICP NMT 5 MG/KG
COBOLT BY ICP NMT 5 MG/KG
CHROMIUM BY ICP NMT 5 MG/KG
COPPER BY ICP NMT 5 MG/KG
IRON BY ICP NMT 5 MG/KG
POTASSIUM BY AA NMT 5 MG/KG
LITHIUM BY ICP NMT 5 MG/KG
MAGNESIUM BY ICP NMT 5 MG/KG
MANGANESE BY ICP NMT 5 MG/KG
MOLYBDENUM BY ICP NMT 5 MG/KG
SODIUM BY ICP NMT 50 MG/KG
NICKEL BY ICP NMT 5 MG/KG
LEAD BY ICP NMT 5 MG/KG
STRONTIUM BY ICP NMT 5 MG/KG
ZINC BY ICP NMT 5 MG/KG
ARSENIC TRACES NMT 0.1 MG/KG
TOTAL SULFUR AS SO4 NMT 50 MG/KG
CHLORIDE NMT 50 MG/KG
SOLUBILITY (APP) CLEAR COLORLESS
SOLUBILITY (METHOD) 100 MG/ML IN 20% NH3
RESIDUE (FILTER TEST) NO RESIDUE
CUT OFF NMT 326 NM
DOCUMENT # F9804/5/4/06/1