Material Safety Data Sheet
HobbyMold 160 Part B (Catalyst)
Date of Preparation: 11/14/01 Revision:
Section 1 - Chemical Product and Company Identification
Product/Chemical Name: HobbyMold 160 Part B (Catalyst) HMIS
Chemical Formula: Blend of Polydimethylsiloxanes 1
H
CAS Number: N/A 1
F
Other Designations: N/A 0
General Use: N/A PPE??
Manufacturer: Freeman Manufacturing and Supply Company, 1101 Moore Road, Avon, OH 44011, ?Sec. 8
Phone (440)934-1902, FAX (440)934-7200, Hours of Operation 8-5, Emergency Phone Number 800-424-9300

Emergency Overview
Small amounts of flammable hydrogen gas may be released during storage
and on contact with water, alcohols, bases, acids and some metallic salts.


Section 2 - Composition / Information on Ingredients
% wt
Ingredient Name CAS Number OSHA
or %
Hazard
vol
Methylvinylpolysiloxane N/A N N/A

Solioxanes and Silicones, Di-Me, Me Hydrogen, Hydrogen- 69013-23-6 Y 10-30%
Terminated

Siloxanes and silicones, Di-Me, Hydrogen-Terminated 70900-21-9 Y 15-40%




Section 3 - Physical and Chemical Properties
Physical Appearance: Blue viscous liquid Water Solubility: Slowly hydrolyses
Odor: Slight Odor Boiling Point: Not Available
Vapor Pressure: Not Available Melting Point: Not Available
Vapor Density (Air=1): Not Available Viscosity (centipoises): 500 cps at 25 C (77 F)
Percent Non-Volatiles by Weight: > 95
Specific Gravity (H2O=1, at 4 ??C): 1.04 @ 25 C (77 F)
Percent Volatiles by Volume: < 5
pH: Not Applicable

Section 4 - Fire-Fighting Measures
NFPA
Flash Point: >93 C (200 F)
Flash Point Method: Tagliabue Closed Cup
1
Autoignition Temperature: >400 C (752 F)
0
1
Flammability Limits (vol/vol %): Lower: 4
??
Upper: 74
Extinguishing Media: Dry chemical, foam carbon dioxide
Unusual Fire or Explosion Hazards: Product will burn under fire conditions. Small amounts of hydrogen gas, which is
flammable and can form explosive mixtures with air, may be released during storage and on contact with water, acids, amines,
and common metals.
Hazardous Decomposition Materials (Under fire conditions): Formaldehyde, oxides of carbon, silica (crystalline).
Fire-Fighting Instructions: Firefighters should wear NIOSH/MSHA approved self-contained breathing apparatus and full
protective clothing. Cool containers exposed to fire with water.
 HobbyMold 160 Part B (Catalyst) Revision:
Section 5 - Stability and Reactivity
Chemical Stability: This material is stable under normal handling and storage conditions described in Section 9.
Materials/Chemicals To Be Avoided: Moisture, water, strong bases, strong acids, strong oxidizing agents, alcohols, metal salts.
Conditions To Be Avoided: Combustible materials, extreme heat, open flame, spark, static electricity, water, moisture.
Decomposition Temperature Range: >200 C (392 F).
The Following Hazardous Decomposition Products Might Be Expected:
Decomposition Type: hydrolysis
Hydrogen
Decomposition Type: thermal
Dimethylcyclosiloxanes
Methylphenylcyclosiloxanes
Decomposition Type: oxidative/thermal
Formaldehyde
Hazardous Polymerization Will Not Occur.
Avoid The Following To Inhibit Hazardous Polymerization: None known.



Section 6 - Health Hazard Information
Potential Health Effects
Acute Effects
Inhalation: Inhalation not likely.
Eye: Slightly irritating. May cause redness, irritation.
Skin: Low acute dermal toxicity. Slightly irritating. May cause redness, irritation.
Ingestion: Low acute oral toxicity.
Chronic Effects: This product does not contain any ingredient designated by IARC, NTP, ACGIH or OSHA as probable or
suspected human carcinogens.
Medical Conditions Aggravated by Long-Term Exposure: No specific information found.




Emergency and First Aid Procedures
Inhalation: Inhalation is not an expected route of exposure. If respiratory irritation or distress occurs remove victim to fresh air.
Seek medical attention if respiratory irritation or distress continues.
Eye Contact: In case of contact, immediately absorb excess with clean absorbent cloth or cotton. Then hold eyelids open and
flush with a steady, gentle stream of water for at least 15 minutes. Seek medical attention if irritation develops or persists or if
visual changes occur.
Skin Contact: Immediately wipe excess material off skin with a dry cloth; then wash skin with plenty of soap and water. Seek
medical attention if irritation develops or persists.
Ingestion: If victim is conscious and alert, give 1-2 glasses of water to drink. Do not give anything by mouth to an unconscious
person. Seek medical attention. Do not leave victim unattended.
Note to Physicians: All treatments should be based on observed signs and symptoms of distress in the patient. Consideration
should be given to the possibility that overexposure to materials other than this product may have occurred.
Special Precautions/Procedures: Treat symptomatically. No specific antidote available.



Section 7 - Spill, Leak, and Disposal Procedures
Evacuation Procedures and Safety: Wear appropriate protective gear for the situation. See Personal Protection Information in
Section 8. CAUTION: Spilled material may make the floor slippery. Do not leave traces of product on floors, ladders, etc., as
this may present a slipping hazard.
Containment of Spill: Follow procedure described below under Cleanup and Disposal of Spill.
Cleanup and Disposal of Spill: Absorb with an inert absorbent. Scrape up and place in appropriate closed container (see
Section 9: Handling and Storage). Clean up residual material with an appropriate solvent like paint thinner or mineral spirits,
provided that there is good ventilation and no sources of ignition.
Environmental and Regulatory Reporting: Do not flush to drain.



Revision: HobbyMold 160 Part B (Catalyst)
Disposal Considerations:
Waste Disposal Method: Chemical additions, processing or otherwise altering this material may make the waste management
information presented in this MSDS incomplete, inaccurate or otherwise inappropriate. Please be advised that state and local
requirements for waste disposal may be more restrictive or otherwise different from federal laws and regulations. Consult state
and local regulations regarding the proper disposal of this material
Container Cleaning and Disposal: Any containers or equipment used should be decontaminated immediately after use.
EPA Hazardous Waste ?? NO


Ecological Information: No data found for product.

Toxicological Information:
Acute Eye irritation: No test data found for product.
Acute Skin Irritation: No test data found for product.
Acute Dermal Toxicity: No test data found for product.
Acute Respiratory Irritation: No test data found for product.
Acute Inhalation Toxicity: No test data found for product.
Acute Oral Toxicity: No test data found for product.
Chronic Toxicity: This product does not contain any substances that are considered by OSHA, NTP, IARC or ACGIH to be
??probable?? or ??suspected?? human carcinogens.


Regulatory Information

Inventory Status
Inventory Status
United States (TSCA) Y - All ingredients are on the inventory.
Canada (DSL) Y - All ingredients are on the inventory.
Europe (EINECS/ELINCS) P - One or more ingredients fall under the polymer exemption or are on the no longer
polymer list. All other ingredients are on the inventory or exempt from listing.
Australia (AICS) Y - All ingredients are on the inventory.
Japan (MITI) N - Not determined or one or more ingredients are not on the inventory and are not
exempt from listing.

Federal Regulations

Inventory Issues: All functional components of this product are listed on the TSCA Inventory.

SARA Title III Hazard Classes:
Fire Hazard - NO
Reactive Hazard - NO
Release of Pressure - NO
Acute Health Hazard - NO
Chronic Health Hazard - NO


State Regulations: This product does not contain any components that are regulated under California Proposition 65.


Other Information

National Fire Protection Association Hazard Ratings ?? NFPA(R):
1 Health Hazard Rating ?? Slight
2 Flammability Rating ?? Slight
3 Instability Rating ?? Minimal

National Paint & Coating Hazardous Materials Identification System ?? HMIS(R):
1 Health Hazard Rating ?? Slight
2 Flammability Rating ?? Slight
3 Instability Rating ?? Minimal


 HobbyMold 160 Part B (Catalyst) Revision:
Section 8 - Exposure Controls / Personal Protection
Introductory Remarks: These recommendations provide general guidance for handling this product. Because specific work
environments and material handling practices vary, safety procedures should be developed for each intended application. While
developing safe handling procedures, do not overlook the need to clean equipment and piping systems for maintenance and
repairs. Waste resulting from these procedures should be handled in accordance with Section 7: Disposal Considerations.
Assistance with selection, use and maintenance of worker protection equipment is generally available from equipment
manufacturers.
This product can form formaldehyde vapors when heated to temperatures above 150 C in the presence of air. Formaldehyde is
a potential cancer hazard, a known skin and respiratory sensitizer, and an irritant to the eyes, nose, throat, skin, and digestive
system. Safe handling conditions may be maintained by keeping vapor concentration within the OSHA Permissible Exposure
Limit for formaldehyde.
Exposure Guidelines: No exposure limits were found for this product or any of its ingredients.
Engineering Controls: Where engineering controls are indicated by use conditions or a potential for excessive exposure exists,
the following traditional exposure control techniques may be used to effectively minimize employee exposures general area
dilution/exhaust ventilation.
Respiratory Protection: When respirators are required, select NIOSH/MSHA approved equipment based on actual or potential
airborne concentrations and in accordance with the appropriate regulatory standards and/or industrial recommendations. For
reasonable foreseeable industrial end uses of this material, respiratory protection should not be necessary.
Eye/Face Protection: Eye and face protection requirements will vary dependent upon work environment conditions and
material handling practices. Appropriate ANSI Z87 approved equipment should be selected for the particular use intended for
this material.
It is generally regarded as good practice to wear a minimum of safety glasses with side shields when working in industrial
environments.
Skin Protection: Skin contact should be minimized through use of gloves and suitable long-sleeved clothing (i.e., shirts and
pants). Consideration must be given both to durability as well as permeation resistance.
Work Practice Controls: Personal hygiene is an important work practice exposure control measure and the following general
measures should be taken when working with or handling this material:
(1) Do not store, use, and/or consume foods, beverages, tobacco products, or cosmetics in areas where this material is stored.
(2) Wash hands and face carefully before eating, drinking, using tobacco, applying cosmetics, or using the toilet.
(3) Wash exposed skin promptly to remove accidental splashes of contact with this material.


Section 9 - Special Precautions and Comments
Handling and Storage
Minimum/Maximum Storage Temperatures: < 32 C (90 F).
Handling: Avoid breathing vapors and mists. Avoid direct or prolonged contact with skin and eyes. Use nonsparking tools and
grounded/bonded equipment and containers when transferring.
Storage: Store in tightly closed containers. Store in an area that is clean, dry, well-ventilated, away from combustible material,
away from ignition sources, away from incompatible materials (see Section 5: Stability and Reactivity).


DOT Transportation Data (49 CFR 172.101):
Transportation Status: IMPORTANT! Statements below provide additional data on listed DOT classification. The listed
Transportation Classification does not address regulatory variations due to changes in package size, mode of shipment or other
regulatory descriptors.
Shipping Name: Not Regulated Packaging Authorizations Quantity Limitations
Shipping Symbols: a) Exceptions: a) Passenger, Aircraft, or Railcar:
Hazard Class: b) Non-bulk Packaging: b) Cargo Aircraft Only:
ID No.: c) Bulk Packaging:
Packing Group: Vessel Stowage Requirements
Label: a) Vessel Stowage:
Special Provisions (172.102): b) Other:


Prepared By:
Revision Notes:

Disclaimer: The information herein is given in good faith but no warranty, expressed or implied, is made.




METHYLHYDROSILOXANE - DIMETHYLSILOXANE COPOLYMER, HYDRIDE TERMINATED