L-TRYPTOPHAN For Biochemistry

Description

Physical state at 20 °C	Solid	Colour	White crystalline
Odour	Odorless	pH value	5.5 – 7.0
Melting point/ Freezing point [°C]	280 – 285 °C	Solubility in water [% weight]	Partially soluble in water

Appearance	White to yellowish-white crystalline powder
Assay (by HClO4 titration)	Min 99%
Heavy metal (as Pb)	Max 0.001%
Ammonium (NH4)	Max 0.01%
Foreign amino acids	Max 0.3%
Other ninhydrin positive substances (as glycine)	Max 0.1%

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