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

                                                                                                         3721

                      tert-BUTYL MAGNESIUM CHLORIDE, 1 M, in TETRAHYDROFURAN



CHEMICAL NAME & SYNONYMS                                                 DOT CLASS     SARA TITLE 313

tert-BUTYL MAGNESIUM CHLORIDE, 1 M,                                      4.3/3/II       No

in Tetrahydrofuran (THF)                                                 TSCA listed - No



FORMULA                             REPORTABLE QUANTITY                  F.W.             CAS#

(CH 3) 3CMgCl   12%                         N/A                          116.88           677-22-5

C 4H 8O         88%                       454 kg                         72.11            109-99-9



PHYSICAL DATA

Boiling point (THF) 65-67°C; Vapor pressure (of THF) 114 mm at 15°C; Vapor density 2.5.



APPEARANCE & ODOR

Clear liquid. Strong ethereal odor.



REACTIVITY & CONDITIONS TO AVOID

May form explosive peroxides on long standing after opening, especially when distilled or

evaporated (which concentrates the peroxides formed). Incompatible with oxidizing materials,

oxygen and water.



FIRE HAZARDS

Highly flammable. Reacts with water        to   form   flammable     gases.       Avoid   ignition   sources.

Firefighters wear SCBA. NFPA # 3-3-3.



EXTINGUISHER                                                             FLASHPOINT       LEL    UEL

Dry chemical, CO 2 and foam.                                             -17°C            1.8%   11.8%



HEALTH HAZARDS

Irritating to skin, eyes and mucous membranes. Narcotic in high concentrations. Chronic exposure

may cause liver and kidney damage. Harmful if swallowed, inhaled or absorbed through the skin.

TC Lo (ihl-human) 25000 ppm (THF) CNS effects. LD 50 (oral-rat) 1650 mg (THF)/kg. LC 50 (inhal-rat)

21,000 ppm. OSHA PEL /ACGIH TLV: TWA 200 ppm; ACGIH STEL: 250 ppm. An NTP lifetime study on rats

and mice suggests that tetrahydrofuran may be a carcinogen in laboratory animals. There is no

data linking exposure to cancer in humans.



SPECIAL PRECAUTIONS

Wear goggles and suitable gloves while handling. Use only with adequate ventilation. Do not

store containers once they have been opened. Store in well ventilated area. Check regularly for

peroxides and before evaporating material to dryness. This material is not on the TSCA inventory

and so can be used only for R&D purposes.



FIRST AID

Wash skin and eyes thoroughly with water after contact. Inhalation remove to fresh air. If

breathing is difficult give oxygen, if breathing stops give artificial respiration. Get medical

assistance.



SPILLS & LEAKS

Ventilate area. Remove ignition sources. Equip responders with protective gear and take up spill

in suitable absorbent and incinerate.





CATALOG #                                                      PREPARED BY                      DATE

3721                                                               MDM                       March 30, 2005