Molecular Formula: C₁₁H₁₁FN₂O₂
Molar mass: 222.2156 g/mol
Density: 1.442 g/cm³
Form: Powder
Color: White
Storage temp: 2-8°C
Flash Point: 226.4 °C
Index of Refraction: 1.673
Melting point: 265 °C (dec.)(lit.)
Appearance: light beige powder
Boiling Point: 450.7 °C at 760 mmHg
Vapour Pressure: 6.54E-09 mmHg at 25°C
Structure of 5-Fluoro-dl-tryptophan (154-08-5):
                  
Product categories: Indoles and derivatives;FA - FLPeptide Synthesis;A - HPeptide Synthesis;Modified Amino Acids;Alphabetic;Tryptophan Derivatives

Carcinogenicity of 5-Fluoro-dl-tryptophan (154-08-5) hasn't been listed as a carcinogen by NTP, IARC,ACGIH, or CA Prop 65. You can see actual entry in RTECS for complete information.

Hazard Note: Irritant
Hazard Codes: Xi
Risk Statements:
36:  Irritating to the eyes
38:  Irritating to the skin
Safety Statements:
22:  Do not breathe dust
24:  Avoid contact with skin
25:  Avoid contact with eyes

 5-Fluoro-dl-tryptophan (154-08-5) is an unnatural amino acid derivatives which also can be called for Tryptophan, 5-fluoro- ; 2-amino-3-(5-fluoro-1H-indol-3-yl)propanoic acid .It can be used as metabolic antagonist of tryptophan.
 5-Fluoro-dl-tryptophan (154-08-5) is hazardous,so the first aid measures and others should be known.Such as: When on the skin: first,should  flush skin with plenty of water immediatelyfor at least 15 minutes while removing contaminated clothing.Secondly,Get shoesmedical aid . Or in the eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids.Then get medical aid soon.While ,it's Inhaled: Remove from exposure and move to fresh air immediately.Give artificial respiration While not breathing. when breathing is difficult, give oxygen.And as soon as to get medical aid .Then you have the ingesting of the product : If victim is conscious and alert, give 2-4 cupfuls of milk or water,and get medical aid .
In addition, 5-Fluoro-dl-tryptophan (154-08-5) can be stable under normal temperature and pressure conditions,and you must not take it with strong oxidants .And also prevent it to broken down into hazardous decomposition products: irritating and toxic fumes and gases.Also known its polymerization is hazardous.