MATERIAL SAFETY DATA SHEET

DIMETHYL SILICONE ELASTOMER DISPERSION IN XYLENE

EFFECTIVE DATE: 05/01/1998

I. PRODUCT IDENTIFICATION

A. Manufactured by:

APPLIED SILICONE CORPORATION

270 Quail Court

Santa Paula, CA 93060

(805) 525-5657

(805) 933-1675 FAX

For chemical emergencies please call: CHEMTREC -- United States: (800) 424-9300. 

International collect calls: 703-527-3887

B. Trade Name: Dimethyl Silicone Elastomer Dispersion

C. Chemical Name and Synonyms: Silicone and Xylene mixture

D. Chemical Formula: Xylene:  C₆H₄(CH₃)₂;  Silicone:  N/A (a reinforced polymer)

E. Chemical Family: Xylene:  Aromatic Solvent;  Silicone:  Reinforced Organopolysiloxane

F. DOT (CFR 49) Hazard Classification: Flammable Liquid

G. DOT (CFR 49) Proper Shipping Name: Coating Solution

H. DOT (CFR 49) Identification Number: NA 1139

II. PRODUCT COMPOSITION

A. Xylene: Health hazard and flammable liquid - 65% by weight

B. Silicone: Non-hazardous - 35% by weight

III. PHYSICAL PROPERTIES

A. Boiling Point: >281^oF

B. Specific Gravity: (water = 1): 0.87

C. Vapor Pressure: at 20°C, 6.0 - 6.7 mm Hg

D. Vapor Density: (Air = 1): 3.7

E.  Water Solubility: nil

F. Evaporation Rate: (Butyl Acetate = 1): <0.86

G.  Appearance and Odor: Clear, colorless liquid, sweet, aromatic odor

IV. FIRE AND EXPLOSION INFORMATION

A. Flash Point (TCC):  79 - 81 ^oF

B. Flammable Limits in Air, % Volume:  Lower  1, Upper: 7

C. Extinguishing Media:  Use water fog, dry chemical, foam, or CO₂.  Do not use a direct water stream.

D. Special Fire Fighting Procedures:  Fire fighters should wear self-contained breathing apparatus and full protective clothing.  Use water spray to cool nearby containers.  Vapors are heavier than air and may accumulate in low areas or areas inadequately ventilated.  Vapors may also travel along the ground to be ignited at locations distant from the handling site resulting in flashback of flame to the handling site.

V. HEALTH HAZARD AND PROTECTION DATA

A. Personal Protection Recommended:  Use local, explosion proof mechanical, explosion proof ventilation capable of maintaining vapor concentrations at the point of use below the PEL.

If exposure may exceed occupational exposure limits use a NIOSH approved respirator to prevent overexposure.  Reference 29 CFR 1910.134 for Federal standards concerning respiratory protection.

Wear impervious gloves and protective clothing as required to prevent skin contact.

Wear protective goggles to prevent eye contact.

An eyewash and safety shower should be nearby and ready for use.

B. Signs and Symptoms of Exposure:

1. Inhalation:  Vapors and mists irritate mucous membranes.  Inhalation of higher concentrations may cause headaches, nausea, vomiting, and coma.  Inhalation of very high concentrations or prolonged exposure may cause unconsciousness or death.

2.  Eye Contact:  Liquid, mists, and vapors are irritating to the eyes.

3. Skin Contact:  Brief contact may dry the skin.  Prolonged or repeated contact may irritate the skin, causing dermatitis.

4. Ingestion:  Swallowing the liquid may cause vomiting.  If vomiting occurs spontaneously, take precautions to prevent vomitus from entering the lungs since even a small quantity in the lungs may result in chemical pneumonitis and pulmonary edema/hemorrhage.

5.  Chronic Effects of Exposure:  Prolonged or repeated exposure to high concentrations may cause neural dysfunction.

C. First Aid for Exposure:

1.  Eye contact:  Immediately flush with water for at least 15 minutes while holding eyelids open and lifting upper and lower eyelids occasionally.  Get medical attention.

2. Skin contact:  Immediately wash skin with lots of soap and water. 

Remove contaminated clothing and shoes and wash before reuse.  Get medical attention if irritation persists after washing.

3. Ingestion:  Do not induce vomiting.  Get immediate medical attention.  If spontaneous vomiting occurs, keep victim's head below his hips to prevent breathing the vomitus into lungs.

4. Inhalation:  Remove to fresh air.  Give artificial respiration if not breathing.  Get immediate medical attention.

D. Occupational Exposure Limits:

*The xylene solvent used in this product typically consists of 80% by weight mixed xylene isomers, and 20% by weight ethylbenzene.

E. Toxicity

1. Oral:  Rat LD50 > 4.3 g/kg

2. Dermal:  Rabbit LD50 > 2.0 ml/kg

3. Inhalation:  Human TCLO = 200 ppm (irritation); Rat LC50 = 5,000 ppm/4 hours

4. Carcinogenicity: This material may contain a chemical known to the state of California to cause cancer, birth defects or other reproductive effects.

5. Other Data:  Laboratory animals exposed by various routes to high doses of xylene showed evidence of effects in the liver, kidneys, lungs, spleen, heart, and adrenals.  Rats exposed to xylene vapor during pregnancy showed embryo/fetotoxic effects.  Mice exposed orally to doses producing maternal toxicity also showed embryo/fetotoxic effects.

F. Medical Conditions Generally Aggravated by Exposure:  Pre-existing eye, skin, and respiratory disorders.

VI. SPILL AND LEAK PROCEDURES

Evacuate the hazard area of unprotected personnel.  Use personal protection to prevent personal exposure.  Extinguish all sources of ignition. Electrically ground all handling equipment.  Provide adequate ventilation.  As required dike with soil or other non-combustible absorbent materials to prevent spread of spill.  Mop or wipe up and place in appropriate containers and/or place absorbent material on spill and transfer absorbed solvent to appropriate containers. 

VII. REACTIVITY DATA

A. Stability: This material is chemically stable.  Hazardous polymerization will not occur.

B. Materials to Avoid: Avoid heat, sparks, open flame and oxidizing agents.

C. Hazardous Decomposition Products: Burning may liberate carbon monoxide, carbon dioxide, oxides of silicone and unidentified organic compounds in black smoke.  

VIII. OTHER PRECAUTIONS

Keep away from heat, sparks, and flames.  Store in a cool, dry, and well ventilated place away from incompatible materials.  To relieve container pressure, vent frequently, particularly in warm weather.  Electrically ground all equipment when handling this product and use only non-sparking tools.  Keep container tightly closed when not in use.  Do not use pressure to empty container.  Wash hands thoroughly after handling.  Do not cut, grind, weld, or drill on or near this container.  Empty containers can contain product residue.  All hazard warnings apply to empty containers. 

IX. DISCLAIMER

All information appearing herein is based upon data considered to be accurate.  However, no warranty is expressed or implied regarding the accuracy of these data or the results to be obtained from the use thereof.