Material Safety Data Sheet
Smooth-Cast 325, 326 and 327 MSDS No. 488
Date of Preparation: November 6, 2007 Revision: 0007
Section 1 - Chemical Product and Company Identification
Product/Chemical Name: Smooth-Cast 325, 326 and 327 Part A
General Use: Polyurethane Elastomer
Manufacturer: Smooth-On Inc., 2000 St. John St., Easton PA 18042
(610) 252-5800, FAX (610) 252-6200
Emergency Contact: Chem-Tel
Domestic 800-255-3924 International 813-248-0585
Section 2 - Composition / Information on Ingredients
Component CAS ACGIH Exposure Limits Weight Percent
Number TWA OSHA PEL (%)
4, 4' Methylene 101-68-8 0.005 ppm 0.02 ppm 70-80
bis(phenylisocyanate)
Butyl benzyl phthalate 85-68-7 None Established None Established 10-15
New Jersey Trade Secret None Established None Established 10-15
#221290880-5052P
Section 3 - Hazards Identification
HMIS
Potential Health Effects
2
H
Primary Entry Routes: Inhalation and Dermal 1
F
1
R
Target Organs: Lungs skin
Acute Effects Inhalation: Vapors are minimal due to low vapor pressure; if sprayed as an aerosol,
excessive concentrations are attainable that could be hazardous on single exposure. Excessive
exposure can cause irritation to respiratory tract and irritation of the eyes. Effects may be delayed.
Decreased ventilatory capacity has been associated with exposure to similar isocyanates.
Eye: May cause irritation, redness, tearing, and blur vision. Prolonged vapor contact may cause
conjunctivitis.
Skin: Contact will cause irritation, reddening, swelling, rash, scaling or blistering. Prolonged or
repeated contact can cause moderate dermatitis.
Ingestion: May have corrosive effects on the linings of the mouth and stomach: symptoms can
include sore throat, abdominal pain, nausea, vomiting and diarrhea.
Carcinogenicity: IARC, NTP, and OSHA do not list any components of this product as a
carcinogen.
Medical Conditions Aggravated by Long-Term Exposure: skin allergies and respiratory
disorders
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
MSDS No. 488 Revision: 0007
Section 4 - First Aid Measures (continued)
After first aid, get appropriate in-plant, paramedic, or community medical support.
Section 5 - Fire-Fighting Measures
NFPA
Flash Point: 390癋 (200癈)
Flash Point Method: COC 1
LEL: Not Established 1
2
--
UEL: Not Established
Flammability Classification: Non-Flammable
Extinguishing Media: Water Fog, Dry Chemical, and Carbon Dioxide Foam
Unusual Fire or Explosion Hazards: Hazardous decomposition products may be formed. Avoid
water contamination in closed containers or confined areas as exothermic heat and carbon dioxide
can evolve.
Section 5 - Fire-Fighting Measures(continued)
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: Only properly protected personnel should remain in the spill area; dike
and contain spill; absorb or scrape up excess into suitable container for disposal; wash area with
dilute ammonia solution. Stop or reduce discharge if it can be done safely.
Regulatory Requirements: Follow applicable OSHA regulations (29 CFR 1910.120).
Section 7 - Handling and Storage
Handling Precautions: Avoid moisture contamination. Reseal partial containers. Use good
general housekeeping procedures.
Storage Requirements: Store in cool dry, well-ventilated area.
Section 8 - Exposure Controls / Personal Protection
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..
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.
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.
Page 2
MSDS No. 488 Revision: 0007
Section 9 - Physical and Chemical Properties
Physical State: Liquid Water Solubility: Reacts with water
Appearance : Pale amber liquid Boiling Point: None determined
Odor : Characteristic odor % Volatile: Nil
Vapor Pressure: <0.00001 @ 25癈 Freezing/Melting Point: None Determined
Vapor Density (Air=1): 8.6 Viscosity: 0.64 poise
Evaporation Rate: Not Applicable
Specific Gravity (H2O=1, at 4 癈): 1.14
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 occur.
Chemical Incompatibilities: Strong bases, water, amines, alcohols.
Conditions to Avoid: Avoid contamination with water and other materials that react with
Isocyanates.
Hazardous Decomposition Products: MDI vapors, hydrogen cyanide gas, oxides of nitrogen,
carbon monoxide and carbon dioxide
Section 11- Toxicological Information
None Established None Established
Section 12 - Ecological Information
None Established
Section 13 ?Disposal Considerations
Disposal: These materials must be disposed of in accordance with applicable Federal, state and
local regulations.
Section 14 - Transport Information
DOT IATA IMDG
Not regulated Not regulated Shipping Name:
ENVIRONMENTALLY
HAZARDOUS SUBSTANCE,
LIQUID, N.O.S.
Butyl Benzyl Phthalate Mixture
UN #: 3082
Hazard Class: 9
Label: Marine Pollutant
Page 3
MSDS No. 488 Revision: 0007
Section 15 - Regulatory Information
EPA Regulations:
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
Chemical Name RQ % Reportable Component
Butyl Benzyl Phthalate 100 lbs. 15.0 Max
4, 4' Methylene bis (phenylisocyanate) 101-68-8 80.0 Max
SARA Toxic Chemical (40 CFR 372.65): None
These products contain the following chemicals that are subject to release reporting requirements
under section 313 of SARA Title III.
Chemical Name CAS # % by Weight
4, 4' Methylene bis (phenylisocyanate) 101-68-8 80.0 Max
SARA EHS (Extremely Hazardous Substance) (40 CFR 355): None
Clean Air Act
SOCMI Chemical: 4, 4' Methylene bis(phenylisocyanate) Hap Code: XOV
TSCA Inventory Status (40 CFR710): All components of this formulation are listed in the TSCA
Inventory.
States Right To Know, Substance List:
California Proposition 65: These products contain butyl benzyl phthalate, which has been identified
by the state of California to cause birth defects or other reproductive harm.
Delaware, Florida, Idaho, Massachusetts, Minnesota, New York, Pennsylvania and Washington
Chemical Name CAS # % by Weight
4, 4' Methylene bis(phenylisocyanate) 101-68-8 80.0 Max
Delaware, Massachusetts, Minnesota New Jersey, New York and Pennsylvania:
Chemical Name CAS # % by Weight
Butyl Benzyl Phthalate 85-68-7 15.0 Max
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.
Page 4
Material Safety Data Sheet
Smooth-Cast 325, 326 and 327 MSDS No. 488
Date of Preparation: November 6, 2007 Revision: 0007
Section 1 - Chemical Product and Company Identification
Product/Chemical Name: Smooth-Cast 325, 326 and 327 Part B
General Use: Polyurethane Elastomer
Manufacturer: Smooth-On Inc., 2000 St. John St., Easton PA 18042
(610) 252-5800, FAX (610) 252-6200
Emergency Contact: Chem-Tel
Domestic 800-255-3924
International 813-248-0585
Section 2 - Composition / Information on Ingredients
Component CAS ACGIH TWA Exposure Limits Weight Percent
Number OSHA PEL (%)
New Jersey Trade Secret - None Established None Established 70-75
#221290880-5006P
New Jersey Trade Secret - None Established None Established 25-30
#221290880-5052P
0.01 mg/m3 0.01 mg/m3
Phenylmercuric neodecanoate 26545-49-3 0.21-0.77
(Smooth-Cast 326 and
Smooth-Cast 327)
Section 3 - Hazards Identification
HMIS
Potential Health Effects
2
H
Primary Entry Routes: Dermal 1
F
Target Organs: Skin and eyes. 1
R
Acute Effects
Inhalation: Vapors, which are not significant unless heated or sprayed can cause irritation to
respiratory tract.
Eye: May cause irritation, redness, tearing.
Skin: Contact will cause irritation and reddening swelling.
Ingestion: Effects are unknown.
Carcinogenicity: IARC, NTP, and OSHA do not list any components of this product as a
carcinogen.
Medical Conditions Aggravated by Long-Term Exposure: Pre-existing skin disorders.
Chronic Effects Of Overexposure: This product contains an organo-mercury catalyst below the
reportable level required by OSHA 1910.1200; however, due to the chronic toxicity of organo-
mercury compounds careful handling of this product is required.
Section 4 - First Aid Measures
Inhalation: Remove source(s) of contamination and move victim to fresh air.
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.
MSDS No. 488 Revision: 0007
Section 5 - Fire-Fighting Measures
NFPA
Flash Point: >300癋 (150癈)
Flash Point Method: COC 1
1
Flammability Classification: Non-Flammable 1
--
Extinguishing Media: Water Fog, Dry Chemical, and Carbon Dioxide Foam
Unusual Fire or Explosion Hazards: None
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: Dike and contain spill; absorb or scrape up excess into suitable container
for disposal. Stop or reduce discharge if it can be done safely.
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. 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
Page 6
MSDS No. 488 Revision: 0007
Section 9 - Physical and Chemical Properties
Physical State: Liquid Water Solubility: Negligible:
Appearance: Clear liquid Boiling Point: None (Polymeric Resin)
Odor: Mild odor % Volatile: Nil
Vapor Pressure: None (Polymeric Resin) Freezing/Melting Point: None Determined
Vapor Density (Air=1): >1 Viscosity: 1.76 poise
Evaporation Rate: None (Polymeric Resin)
Specific Gravity (H2O=1, at 4 癈): 1.00
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 and oxidizers.
Conditions to Avoid: Avoid contamination with water and other materials that react with amines.
Thermal Decomposition Products: Oxides of nitrogen, carbon monoxide and carbon dioxide
Section 11- Toxicological Information
Toxicity Data:
Reproductive Toxicity: None Established
Acute Inhalation Effects:
Mutagenicity: None Established
None Established
Teratogenicity: None Established
Acute Oral Effects: None Established Sensitization: None Established
Section 12 - Ecological Information
None Established
Section 13 - Disposal Considerations
Disposal: These materials contain a hazardous constituent as identified in RCRA, Title 40 CFR
261, Appendix VIII and must be disposed of in accordance with applicable Federal, state, and
local regulations.
Section 14 - Transport Information
DOT IATA IMDG
Not Regulated Not Regulated Not Regulated
Page 7
MSDS No. 488 Revision: 0007
Section 15 - Regulatory Information
SARA Toxic Chemical (40 CFR 372.65):
Smooth-Cast 326 Part B and Smooth-Cast 327 Part B contain the following chemicals that are
subject to release reporting requirements under section 313 of SARA Title III.
Chemical Name CAS # % by Weight
Mercury Compound -- 0.77 Max
TSCA Inventory Status (40 CFR 710): All components of this product are listed on the TSCA
inventory.
SARA EHS (Extremely Hazardous Substance) (40 CFR 355): Not listed, Threshold Planning
Quantity (TPQ)
States Right To Know, Substance List:
Smooth-Cast 326 Part B and Smooth-Cast 327 Part B: These products contain a mercury
compound, which has been identified by the state of California to cause birth defects or other
reproductive harm.
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.
Page 8
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