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1.08374

Millipore

L-Tryptophan

for biochemistry

Synonym(s):
L-Tryptophan, Trp
Empirical Formula (Hill Notation):
C11H12N2O2
CAS Number:
Molecular Weight:
204.23
MDL number:
EC Index Number:
200-795-6

Quality Level

form

solid

potency

16000 mg/kg LD50, oral (Rat)

pH

5.5-7.0 (20 °C, 10 g/L in H2O)

mp

290 °C (decomposition)

solubility

10 g/L

bulk density

400 kg/m3

storage temp.

2-30°C

InChI

1S/C11H12N2O2/c12-9(11(14)15)5-7-6-13-10-4-2-1-3-8(7)10/h1-4,6,9,13H,5,12H2,(H,14,15)

InChI key

QIVBCDIJIAJPQS-UHFFFAOYSA-N

Analysis Note

Assay (perchloric acid titration, calculated on dried substance): 99.0 - 101.0 %
Identity (IR-spectrum): passes test
Identity (specific rotation): passes test
Spec. rotation (α 20/D, 10 g/l, water, calc. on dried substance): -30.0 to -33.0
Appearance: white to almost white, crystalline or amorphous powder
Appearance of solution (10 g/l, Hydrochloric acid 1 mol/l): clear and colorless
Chloride (Cl): ≤ 200 ppm
Sulfate (SO₄): ≤ 300 ppm
Fe (Iron): ≤ 20 ppm
Ninhydrin-positive substances (LC)(any ninhydrin-positive impurity): ≤ 0.2 %
Ninhydrin-positive substances (LC) (ammonium (570 nm)): ≤ 0.02 %
Ninhydrin-positive substances (LC)(total impurities): ≤ 0.5 %
Loss on drying (105 °C; 3 h): ≤ 0.3 %

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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