GFS CHEMICALS, INC.

                                    P.O. Box 245 Powell, OH 43065

                                 740-881-5501(Tel.) 740-881-5989(Fax)

                                 1-800-424-9300(Chemtrec 24Hr. Info.)



                               MATERIAL SAFETY DATA SHEET

                                                                                                   3271

                                             2-PENTYNE



CHEMICAL NAME & SYNONYMS                                                DOT CLASS     SARA TITLE 313

2-Pentyne; Ethyl Methylacetylene                                        3/II          No

                                                                        TSCA listed - No



FORMULA                            REPORTABLE QUANTITY                  F.W.          CAS#

CH 3CH 2C/CCH 3                            N/A                          68.12         627-21-4



PHYSICAL DATA

Boiling point 56°C; Density 0.711; Index of refraction 1.4034; immiscible with water; Freezing

point -109°C.



APPEARANCE & ODOR

Clear, colorless liquid.



REACTIVITY & CONDITIONS TO AVOID

Stable. Incompatible with acid, bases and oxidizing agents.



FIRE HAZARDS

Flammable liquid, will emit toxic fumes of carbon monoxide, carbon dioxide. Firefighters wear

SCBA. NFPA # 1-3-0.



EXTINGUISHER                                                            FLASHPOINT    LEL   UEL

CO 2, ABC dry powder, foam, water spray or fog.                         -20°C         Not known



HEALTH HAZARDS

Vapor or mist may be irritating to skin, eyes and mucous membranes. The HEALTH RISKS of this

product HAVE NOT BEEN FULLY DETERMINED. May be harmful if swallowed, inhaled or absorbed through

the skin. Avoid contact with skin and eyes. Avoid breathing vapor. This product must only be

used under conditions of PRUDENT LABORATORY PRACTICE as described at 40 CFR 720.36. This product

is supplied SOLELY for use in RESEARCH AND DEVELOPMENT by or under the supervision of a

TECHNICALLY QUALIFIED INDIVIDUAL, Who should be FULLY COGNIZANT of the procedures for working

with chemical products of this type as described at 40 CFR 720.36. No LD/TD data found. OSHA

PEL/ACGIH TLV not established. Not a listed carcinogen. It DOES NOT indicate absence of

carcinogenicity.



FIRST AID

Remove contaminated clothing immediately and launder before reuse. Discard contaminated shoes.

For eyes, flush with plenty of water for at least fifteen minutes. Seek medical attention

immediately. For skin, wash thoroughly with soap and water, while removing clothing. Seek

medical attention if rash should occur. For inhalation, remove to fresh air. If not breathing

give mouth to mouth resuscitation. If breathing is difficult, give oxygen. Seek medical

attention at once.



SPECIAL PRECAUTIONS

Goggles, rubber gloves, protective clothing are required. Use only with adequate ventilation

and/or suitable respiratory protection. Avoid all contact. Store product in well sealed

container in refrigerator.



SPILLS & LEAKS

Remove ignition sources and ventilate area. Equip personnel with SCBA and full protective

clothing. Take up spill in absorbent and dispose to incinerator or other suitable hazardous

waste. Wash spill area thoroughly with water after absorbent is picked up.





CATALOG #                                                     PREPARED BY                   DATE

3271                                                              MDM                     June 29, 2005