Section 1 - Chemical Product and Company Identification                      

Product/Chemical Name: Mold Max-20 and Mold Max-30 Part B           Date Prepared: 5/30/00

General Use: Silicone Elastomer

From: Eager Plastics, Inc., 3350 W. 48th Place Chicago, IL 60632 Phone (773)927-3484, FAX (773)650-5853

Emergency Contact: 773-807-4314

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Section 2 - Composition / Information on Ingredients



CAS Number


Exposure Limits


Weight Percent





None Established

None Established



Silicic Acid, ethyl ester


None Established

None Established



Ethyl  silicate


85 mg/m3

85 mg/m3


Dibutyltin Dilaurate


0.1 mg/m3

0.1 mg/m3






1880 mg/m3

1900 mg/m3








Section 3 - Hazards Identification






Potential Health Effects


Primary Entry Routes: Inhalation and Dermal

Acute Effects Inhalation: This product has not been tested.  However, inhalation studies of ethyl silicate in a rat gave a LCLo of 1000ppm/4h and in a guinea pig a LCLo of 700 ppm/6h.

Eye: May cause irritation, redness, tearing, and blur vision.  Prolonged vapor contact may cause conjunctivitis.

Skin:  Contact may cause irritation, reddening, and possible rash. 

Ingestion: This product has not been tested but should be considered Toxic By Mouth based on the organotin compound’s acute oral/rat LD50: 175 mg/Kg.

Carcinogenicity: IARC, NTP, and OSHA do not list any components of this product as a carcinogen.

Medical Conditions Aggravated by Long-Term Exposure: No Data Available


Section 4 - First Aid Measures

Inhalation Remove source(s) of contamination and move victim to fresh air.  If breathing has stopped, give artificial respiration, then oxygen if needed.  Contact physician immediately. 

Eye Contact:     Flush eyes with plenty of water. If irritation persists, seek medical attention.

Skin Contact: In case of skin contact, wash thoroughly with soap and water; remove contaminated clothing and launder before reuse; seek medical attention if rash develops.

Ingestion:  Do not induce vomiting unless instructed by a physician.   Contact physician immediately

After first aid, get appropriate in-plant, paramedic, or community medical support.


Section 5 - Fire-Fighting Measures


Flash Point:  110°F (43.3°C)                LEL: Not Established                       UEL: Not Established

Flash Point Method: PMCC

Flammability Classification: Combustible Liquid

Extinguishing Media: Dry Chemical, Carbon Dioxide, and Foam

Unusual Fire or Explosion Hazards: On combustion, silica, tin oxide and carbon dioxide are emitted.

Fire-Fighting Instructions: Fire fighters should wear self-contained breathing apparatus.  Do not release runoff from fire control methods to sewers or waterways.

Fire-Fighting Equipment: Because fire may produce toxic thermal decomposition products, wear a self-contained breathing apparatus (SCBA) with a full facepiece operated in pressure-demand or positive-pressure mode.


Section 6 - Accidental Release Measures

Spill /Leak Procedures: Evacuate area.  Eliminate all sources of ignition.  Put on appropriate protective gear including NIOSH/MSHA approved self-contained breathing apparatus, rubber boots and heavy rubber gloves.  Absorb on vermiculite Place in covered containers using non-sparking tools and transport outdoors. Ventilate area and wash spill site after material pickup is complete.

Regulatory Requirements: Follow applicable OSHA regulations (29 CFR 1910.120).

Section 7 - Handling and Storage

Handling Precautions: Minimize breathing of vapors and avoid prolonged or repeated contact with skin.  Wear proper protective equipment.  If ventilation is not sufficient, wear proper respiratory equipment. Reseal partial containers.  Use good general housekeeping procedures.

Storage Requirements: Store in cool dry, well-ventilated area. 

Section 8 - Exposure Controls / Personal Protection

Engineering Controls:

Ventilation: Provide general or local exhaust ventilation systems to maintain airborne concentrations below OSHA PELs (Sec. 2). Local exhaust ventilation is preferred because it prevents contaminant dispersion into the work area by controlling it at its source.

Administrative Controls:

Respiratory Protection: Seek professional advice prior to respirator selection and use. Follow OSHA respirator regulations (29 CFR 1910.134) and, if necessary, wear an MSHA/NIOSH-approved respirator. Select respirator based on its suitability to provide adequate worker protection for given working conditions, level of airborne contamination, and presence of sufficient oxygen. For emergency or nonroutine operations (cleaning spills, reactor vessels, or storage tanks), wear an SCBA. Warning! Air-purifying respirators do not protect workers in oxygen-deficient atmospheres. If respirators are used, OSHA requires a written respiratory protection program that includes at least: medical certification, training, fit testing, periodic environmental monitoring, maintenance, inspection, cleaning, and convenient, sanitary storage areas.

Protective Clothing/Equipment: Wear chemically protective gloves, boots, and aprons to prevent prolonged or repeated skin contact. Wear protective eyeglasses or chemical safety goggles, per OSHA eye- and face-protection regulations (29 CFR 1910.133). Contact lenses are not eye protective devices. Appropriate eye protection must be worn instead of, or in conjunction with contact lenses.

Comments: Never eat, drink, or smoke in work areas. Practice good personal hygiene after using this material, especially before eating, drinking, smoking, using the toilet, or applying cosmetics

Section 9 - Physical and Chemical Properties

Physical State: Liquid

Appearance : Blue liquid

Odor : Sweet odor

Vapor Pressure: Not Available

Vapor Density (Air=1): Not Applicable

Specific Gravity (H2O=1, at 4 °C): 1.0

Water Solubility:  Insoluble

Boiling Point: 172°F (78°C)

% Volatile: Not Available

Freezing/Melting Point: Not Applicable

Evaporation Rate: Not Applicable      


Section 10 - Stability and Reactivity

Stability: These products are stable at room temperature in closed containers under normal storage and handling conditions.

Polymerization: Hazardous polymerization can not occur.

Chemical Incompatibilities: Strong acids, bases, and oxidizers.

Hazardous Decomposition Products: Silica, tin oxide carbon monoxide and carbon dioxide.

Section 11- Toxicological Information

Eye Effects: Irritation

Skin Effects: Irritation


Carcinogenicity: None Determined

Mutagenicity: None Determined

Teratogenicity: None Determined

Section 12 - Ecological Information

None Established

Section 13 - Disposal Considerations

Disposal: Must be disposed of in accordance with applicable Federal, state and local regulations.

 Hazardous Waste: RCRA IGNITABLE (D001)

Section 14 - Transport Information






Not Classified


Shipping Name:

Flammable Liquid N.O.S.

(Ethyl Silicate and Ethanol)

UN #: 1993

Hazard Class: Class 3

                        Packing Group III

Label: Flammable Liquid

Shipping Name:

Flammable Liquid N.O.S.

(Ethyl Silicate and Ethanol )

UN #: 1993

Hazard Class: Class 3.3

                        Packing Group III

Label: Flammable Liquid


Section 15 - Regulatory Information

EPA Regulations:

RCRA Hazardous Waste Number: Not listed (40 CFR 261.33)

CERCLA Hazardous Substance (40 CFR 302.4) listed specific per RCRA, Sec. 3001; CWA, Sec. 311 (b)(4); CWA, Sec. 307(a), CAA, Sec. 112:     None

SARA Toxic Chemical (40 CFR 372.65): None

SARA EHS (Extremely Hazardous Substance) (40 CFR 355): None

This product does not contain chemicals that are subject to release reporting requirements under section 313 of


TSCA Inventory Status (40 CFR710): All components of this formulation are listed in the TSCA Inventory.


State Regulations:


California Proposition 65: This product contains ethanol, which has been identified by the state of California to cause cancer, birth defects or other reproductive harm.

Massachusetts Right To Know, Substance List:  

                                                                                Hazardous Substances

                          Chemical Name                                                           CAS #                                    % by Weight

                                 Ethyl Silicate                                                        78-10-4                                   10.0 Max

                             Ethyl Alcohol                                                      64-17-5                                   1.0 Max

Pennsylvania Right To Know, Substance List:

                                                                                                Hazardous Substances

                          Chemical Name                                                           CAS #                                    % by Weight

                                 Silicic Acid,  ethyl ester                                     11099-06-2                             20.0 Max

                                 Silicic Acid,  tetraethlyl ester                            78-10-4                                   10.0 Max

                                Ethanol                                                                  64-17-5                                   1.0 Max 


Section 16 - Other Information

Prepared By: Dominick J. Finocchio

Title:  Technical Director


Disclaimer: The information contained in this MSDS is considered accurate as of the version date.  However, no warranty is expressed or implied regarding the accuracy of the data.  Since the use of this product is not within the control of Smooth-On Inc., it is the user’s obligation to determine the suitability of the product for its intended application and assumes all risk and liability for its safe use.