L-Tryptophan (Ph. Eur., USP) pure, pharma grade

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L-Tryptophan (Ph. Eur., USP) pure, pharma grade
Content: 500 GRM
Physical Description:
Solid
• All amino acids from AppliChem are of non-animal origin!
Specification: Assay (titr., calc. on dried subst.)@98.5 - 101.0 %§a20°C/D; 1 %, H2O, calc. on dried subst.@-33.0° - -30.0°§Appearance of solution@passes test§Identity@passes test§pH (1 %; H2O; 20°C)@5.5 - 7.0§Heavy metals (as Pb)@max. 0.0015 %§Sulfated ash@max. 0.1 %§Loss on drying (3 h; 105°C)@max. 0.3 %§a25°C/D; 1 %, H2O@-32.8° - -29.4°§Ammonium@max. 0.02 %§Chloride@max. 0.02 %§Sulfate@max. 0.03 %§Fe@max. 0.002 %§Ninhydrin positive substances (HPLC)@§each individual impurity@max. 0.2 %§Total impurities@max. 0.5 %§Impurity A and other related subst. (HPLC)@§Total impurity befor Tryptophan@max. 0.01 %§Total impurity afterTryptophan@max. 0.03 %§Impurity A@max. 0.001 %