SIGMA-ALDRICH



                         Material Safety Data Sheet



                                                Date Printed: 19/OCT/2004

                                                Date Updated: 13/MAR/2004

                                                              Version 1.2

                                                  According to 91/155/EEC



Classified as Hazardous according to the criteria of EU Annex 1 and

NOHSC.



1 - Product and Company Information



Product Name                   ACETYLENEDICARBOXYLIC ACID,

                               MONOPOTASSIU M SALT, 98+%

Product Number                 A15401



Company                        Sigma-Aldrich Pty, Ltd

                               Unit 2, 14 Anella Avenue

                               Castle Hill NSW 1765

                               Australia

Technical Phone #              +61 2 9841 0555

Fax                            +61 2 9841 0500

Emergency Phone #              +61 2 9841 0566



2 - Composition/Information on Ingredients



Product Name                         CAS #       EC no       Annex I

                                                             Index Number

ACETYLENE DICARBOXYLIC               928-04-1    213-169-2   None

ACIDMONOPOTASSIUM



Formula             C4H2O4.K

Molecular Weight    152.15 AMU

Synonyms            Monopotassium salt of acetylenedicarboxylic acid

                    * U-4783



3 - Hazards Identification



SPECIAL INDICATION OF HAZARDS TO HUMANS AND THE ENVIRONMENT

   Toxic by inhalation and if swallowed. Very toxic in contact with

   skin. Irritating to eyes, respiratory system and skin.





4 - First Aid Measures



AFTER INHALATION

   If inhaled, remove to fresh air. If not breathing give

   artificial respiration. If breathing is difficult, give oxygen.



AFTER EYE CONTACT

   Assure adequate flushing of the eyes by separating the eyelids

   with fingers.



AFTER INGESTION

   If swallowed, wash out mouth with water provided person is

   conscious. Call a physician.



5 - Fire Fighting Measures



EXPLOSION DATA

   Dust Potential: This material, like most materials in powder

   form, is capable of creating a dust explosion.



EXTINGUISHING MEDIA

   Suitable: Carbon dioxide, dry chemical powder, or appropriate

   foam. Water spray.



SPECIAL PROTECTIVE EQUIPMENT FOR FIREFIGHTERS

   Wear self-contained breathing apparatus and protective clothing

   to prevent contact with skin and eyes.



6 - Accidental Release Measures



PROCEDURE(S) OF PERSONAL PRECAUTION(S)

   Wear respirator, chemical safety goggles, rubber boots, and

   heavy rubber gloves.



METHODS FOR CLEANING UP

   Sweep up, place in a bag and hold for waste disposal. Avoid

   raising dust. Ventilate area and wash spill site after material

   pickup is complete.



7 - Handling and Storage



HANDLING

   Directions for Safe Handling: Do not breathe dust. Do not get in

   eyes, on skin, on clothing. Avoid prolonged or repeated exposure.



STORAGE

   Conditions of Storage: Keep tightly closed. Store in a cool dry

   place.



8 - Exposure Controls / Personal Protection



ENGINEERING CONTROLS

   Use only in a chemical fume hood. Safety shower and eye bath.



GENERAL HYGIENE MEASURES

   Wash contaminated clothing before reuse. Wash thoroughly after

   handling.



PERSONAL PROTECTIVE EQUIPMENT

   Special Protective Measures: Wear appropriate government approved

   respirator, chemical-resistant gloves, safety goggles, other

   protective clothing.



9 - Physical and Chemical Properties



Appearance              Color: White

                        Form: Powder



Property                Value                 At Temperature or Pressure



pH                      N/A

BP/BP Range             N/A

MP/MP Range             N/A

Flash Point             N/A

Flammability            N/A

Autoignition Temp       N/A

Oxidizing Properties    N/A

Explosive Properties    N/A

Explosion Limits        N/A





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Vapor Pressure            N/A

SG/Density                N/A

Partition Coefficient     N/A

Viscosity                 N/A

Vapor Density             N/A

Saturated Vapor Conc.     N/A

Evaporation Rate          N/A

Bulk Density              N/A

Decomposition Temp.       N/A

Solvent Content           N/A

Water Content             N/A

Surface Tension           N/A

Conductivity              N/A

Miscellaneous Data        N/A

Solubility                N/A



10 - Stability and Reactivity



STABILITY

   Materials to Avoid: Bases, Reducing agents, Oxidizing agents.



HAZARDOUS DECOMPOSITION PRODUCTS

   Hazardous Decomposition Products: Carbon monoxide, Carbon dioxide.



11 - Toxicological Information



RTECS NUMBER: AP0700000



ACUTE TOXICITY



   LD50

   Oral

   Mouse

   63 mg/kg



   LD50

   Intraperitoneal

   Mouse

   32 MG/KG



   LD50

   Intravenous

   Mouse

   89 MG/KG



   LD50

   Skin

   Guinea pig

   25 mg/kg



SIGNS AND SYMPTOMS OF EXPOSURE

   To the best of our knowledge, the chemical, physical, and

   toxicological properties have not been thoroughly investigated.



ROUTE OF EXPOSURE

   Inhalation: Material is irritating to mucous membranes and upper

   respiratory tract.

   Multiple Routes: May be fatal if inhaled, swallowed, or absorbed

   through skin. Causes eye and skin irritation.



12 - Ecological Information







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No data available.



13 - Disposal Considerations



SUBSTANCE DISPOSAL

   Dissolve or mix the material with a combustible solvent and burn

   in a chemical incinerator equipped with an afterburner and

   scrubber. Observe all federal, state, and local environmental

   regulations.



14 - Transport Information



RID/ADR

   UN#: 2811

   Class: 6.1

   PG: I

   Proper Shipping Name: Toxic solid, organic, n.o.s.



IMDG

   UN#: 2811

   Class: 6.1

   PG: I

   Proper Shipping Name: Toxic solid, organic, n.o.s.

   Marine Pollutant: No

   Severe Marine Pollutant: No

   Technical Name: Required



IATA

   UN#: 2811

   Class: 6.1

   PG: I

   Proper Shipping Name: Toxic solid, organic, n.o.s.

   Inhalation Packing Group I: No

   Technical Name: Required



15 - Regulatory Information



CLASSIFICATION AND LABELING ACCORDING TO EU DIRECTIVES

   INDICATION OF DANGER: T+

     Very toxic.

   R-PHRASES: 23/25 27 36/37/38

     Toxic by inhalation and if swallowed. Very toxic in contact

     with skin. Irritating to eyes, respiratory system and skin.

   S-PHRASES: 26 36/37/39 45

     In case of contact with eyes, rinse immediately with plenty of

     water and seek medical advice. Wear suitable protective

     clothing, gloves, and eye/face protection. In case of accident

     or if you feel unwell, seek medical advice immediately (show

     the label where possible).



16 - Other Information



WARRANTY

   The above information is believed to be correct but does not

   purport to be all inclusive and shall be used only as a guide. The

   information in this document is based on the present state of our

   knowledge and is applicable to the product with regard to

   appropriate safety precautions. It does not represent any

   guarantee of the properties of the product. Sigma-Aldrich Inc.,

   shall not be held liable for any damage resulting from handling or

   from contact with the above product. See reverse side of invoice

   or packing slip for additional terms and conditions of sale.





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   Copyright 2004 Sigma-Aldrich Co. License granted to make unlimited

   paper copies for internal use only.



DISCLAIMER

   For R&D use only. Not for drug, household or other uses.









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