Material Safety Data Sheet

                           DL-5-Methyltryptophan, 98%

ACC# 49109



                      Section 1 - Chemical Product and Company Identification



MSDS Name: DL-5-Methyltryptophan, 98%

Catalog Numbers: AC127970000, AC127970010, AC127972500

Synonyms: None known.

Company Identification:

         Acros Organics N.V.

         One Reagent Lane

         Fair Lawn, NJ 07410

For information in North America, call: 800-ACROS-01

For emergencies in the US, call CHEMTREC: 800-424-9300



                  Section 2 - Composition, Information on Ingredients





      CAS#                    Chemical Name                       Percent       EINECS/ELINCS

     951-55-3      DL-5-Methyltryptophan                            98             213-453-6





                              Section 3 - Hazards Identification





                                  EMERGENCY OVERVIEW

Appearance: very light yellow solid.

Caution! May cause eye and skin irritation. May cause respiratory and digestive tract irritation.

The toxicological properties of this material have not been fully investigated.

Target Organs: No data found.





Potential Health Effects

Eye: May cause eye irritation.

Skin: May cause skin irritation.

Ingestion: May cause irritation of the digestive tract. The toxicological properties of this

substance have not been fully investigated.

Inhalation: May cause respiratory tract irritation. The toxicological properties of this substance

have not been fully investigated.

Chronic: No information found.



                                Section 4 - First Aid Measures

Eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and

lower eyelids. Get medical aid.

Skin: Get medical aid. Flush skin with plenty of water for at least 15 minutes while removing

contaminated clothing and shoes. Wash clothing before reuse.

Ingestion: Never give anything by mouth to an unconscious person. Get medical aid. Do NOT

induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.

Inhalation: Remove from exposure and move to fresh air immediately. If not breathing, give

artificial respiration. If breathing is difficult, give oxygen. Get medical aid.

Notes to Physician: Treat symptomatically and supportively.



                             Section 5 - Fire Fighting Measures







General Information: As in any fire, wear a self-contained breathing apparatus in

pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire,

irritating and highly toxic gases may be generated by thermal decomposition or combustion.

Extinguishing Media: Use agent most appropriate to extinguish fire. Use water spray, dry

chemical, carbon dioxide, or appropriate foam.

Flash Point: Not applicable.

Autoignition Temperature: Not applicable.

Explosion Limits, Lower:Not available.

Upper: Not available.

NFPA Rating: (estimated) Health: 1; Flammability: 0; Instability: 0



                         Section 6 - Accidental Release Measures







General Information: Use proper personal protective equipment as indicated in Section 8.

Spills/Leaks: Vacuum or sweep up material and place into a suitable disposal container. Clean

up spills immediately, observing precautions in the Protective Equipment section. Avoid

generating dusty conditions. Provide ventilation.



                             Section 7 - Handling and Storage







Handling: Wash thoroughly after handling. Remove contaminated clothing and wash before

reuse. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact

with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation.

Storage: Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from

incompatible substances.



                   Section 8 - Exposure Controls, Personal Protection







Engineering Controls: Facilities storing or utilizing this material should be equipped with an

eyewash facility and a safety shower. Use adequate ventilation to keep airborne concentrations

low.

Exposure Limits

   Chemical Name                ACGIH                 NIOSH             OSHA - Final PELs

 DL-5-Methyltryptophan none listed                   none listed           none listed



OSHA Vacated PELs: DL-5-Methyltryptophan: No OSHA Vacated PELs are listed for this

chemical.

Personal Protective Equipment

Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's

eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166.

Skin: Wear appropriate protective gloves to prevent skin exposure.

Clothing: Wear appropriate protective clothing to prevent skin exposure.

Respirators: A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI

Z88.2 requirements or European Standard EN 149 must be followed whenever workplace

conditions warrant respirator use.



                      Section 9 - Physical and Chemical Properties







Physical State: Solid

Appearance: very light yellow

Odor: none reported

pH: Not available.

Vapor Pressure: Not available.

Vapor Density: Not available.

Evaporation Rate:Not available.

Viscosity: Not available.

Boiling Point: Not available.

Freezing/Melting Point:280.00 - 282.00 deg C

Decomposition Temperature:Not available.

Solubility: Not available.

Specific Gravity/Density:Not available.

Molecular Formula:C12H14N2O2

Molecular Weight:218.25



                          Section 10 - Stability and Reactivity







Chemical Stability: Stable under normal temperatures and pressures.

Conditions to Avoid: Incompatible materials, dust generation, excess heat, strong oxidants.

Incompatibilities with Other Materials: Oxidizing agents.

Hazardous Decomposition Products: Nitrogen oxides, carbon monoxide, irritating and toxic

fumes and gases, carbon dioxide.

Hazardous Polymerization: Has not been reported



                         Section 11 - Toxicological Information

RTECS#:

CAS# 951-55-3 unlisted.

LD50/LC50:

Not available.



Carcinogenicity:

CAS# 951-55-3: Not listed by ACGIH, IARC, NTP, or CA Prop 65.



Epidemiology: No information found

Teratogenicity: No information found

Reproductive Effects: No information found

Mutagenicity: No information found

Neurotoxicity: No information found

Other Studies:



                            Section 12 - Ecological Information





No information available.



                            Section 13 - Disposal Considerations





Chemical waste generators must determine whether a discarded chemical is classified as a

hazardous waste. US EPA guidelines for the classification determination are listed in 40 CFR Parts

261.3. Additionally, waste generators must consult state and local hazardous waste regulations

to ensure complete and accurate classification.

RCRA P-Series: None listed.

RCRA U-Series: None listed.



                            Section 14 - Transport Information





                                   US DOT                              Canada TDG

 Shipping Name:      Not regulated as a hazardous material        No information available.

  Hazard Class:

  UN Number:

 Packing Group:





                            Section 15 - Regulatory Information





US FEDERAL

TSCA

   CAS# 951-55-3 is not listed on the TSCA inventory. It is for research and development use

only.

Health & Safety Reporting List

   None of the chemicals are on the Health & Safety Reporting List.

Chemical Test Rules

   None of the chemicals in this product are under a Chemical Test Rule.

Section 12b

   None of the chemicals are listed under TSCA Section 12b.

TSCA Significant New Use Rule

   None of the chemicals in this material have a SNUR under TSCA.

CERCLA Hazardous Substances and corresponding RQs

   None of the chemicals in this material have an RQ.

SARA Section 302 Extremely Hazardous Substances

   None of the chemicals in this product have a TPQ.

Section 313      No chemicals are reportable under Section 313.

Clean Air Act:

   This material does not contain any hazardous air pollutants.

   This material does not contain any Class 1 Ozone depletors.

   This material does not contain any Class 2 Ozone depletors.

Clean Water Act:

   None of the chemicals in this product are listed as Hazardous Substances under the CWA.

   None of the chemicals in this product are listed as Priority Pollutants under the CWA.

   None of the chemicals in this product are listed as Toxic Pollutants under the CWA.

OSHA:

   None of the chemicals in this product are considered highly hazardous by OSHA.

STATE

   CAS# 951-55-3 is not present on state lists from CA, PA, MN, MA, FL, or NJ.



California Prop 65



California No Significant Risk Level: None of the chemicals in this product are listed.



European/International Regulations

European Labeling in Accordance with EC Directives

Hazard Symbols:

    Not available.

Risk Phrases:



Safety Phrases:

   S 24/25 Avoid contact with skin and eyes.

   S 37 Wear suitable gloves.

   S 45 In case of accident or if you feel unwell, seek medical advice

   immediately (show the label where possible).

   S 28A After contact with skin, wash immediately with plenty of water

   .



WGK (Water Danger/Protection)

   CAS# 951-55-3: No information available.

Canada - DSL/NDSL

None of the chemicals in this product are listed on the DSL or NDSL list.

Canada - WHMIS

   WHMIS: Not available.

This product has been classified in accordance with the hazard criteria of the Controlled Products

Regulations and the MSDS contains all of the information required by those regulations.

Canadian Ingredient Disclosure List

                                       Section 16 - Additional Information





MSDS Creation Date: 9/02/1997

Revision #5 Date: 10/03/2005

The information above is believed to be accurate and represents the best information currently available to us. However, we

make no warranty of merchantability or any other warranty, express or implied, with respect to such information, and we assume

no liability resulting from its use. Users should make their own investigations to determine the suitability of the information for

their particular purposes. In no event shall Fisher be liable for any claims, losses, or damages of any third party or for lost profits

or any special, indirect, incidental, consequential or exemplary damages, howsoever arising, even if Fisher has been advised of

the possibility of such damages.