Product Name: SPECFLEX* NF 657 Polyol DA Issue Date: 09/07/2012

Print Date: 10 Sep 2012

®(TM)*Trademark

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The Dow Chemical Company encourages and expects you to read and understand the entire (M)SDS, 

as there is important information throughout the document. We expect you to follow the precautions 

identified in this document unless your use conditions would necessitate other appropriate methods or 

actions.

1. Product and Company Identification

Product Name

SPECFLEX* NF 657 Polyol DA

COMPANY IDENTIFICATION

The Dow Chemical Company

2030 Willard H. Dow Center

Midland, MI 48674

United States

Customer Information Number: 800-258-2436

SDSQuestion@dow.com

EMERGENCY TELEPHONE NUMBER

24-Hour Emergency Contact: 989-636-4400

Local Emergency Contact: 989-636-4400

2. Hazards Identification

Emergency Overview

Color: White to off-white 

Physical State: Liquid.

Odor: Characteristic

Hazards of product:

CAUTION! May cause eye irritation. Isolate area. Possible cancer hazard. May 

cause cancer based on animal data. 

OSHA Hazard Communication Standard

This product is a "Hazardous Chemical" as defined by the OSHA Hazard Communication Standard, 29 

CFR 1910.1200. 

Potential Health Effects

Eye Contact: May cause slight temporary eye irritation. May cause slight temporary corneal injury. 

Skin Contact: Prolonged exposure not likely to cause significant skin irritation. 

Skin Absorption: Prolonged skin contact is unlikely to result in absorption of harmful amounts. 

Material Safety Data Sheet

The Dow Chemical Company
Product Name: SPECFLEX* NF 657 Polyol DA Issue Date: 09/07/2012

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Skin Sensitization: Contains component(s) which have shown limited potential to produce allergic 

skin reactions. 

Inhalation: At room temperature, exposure to vapor is minimal due to low volatility; single exposure is 

not likely to be hazardous. 

Ingestion: Low toxicity if swallowed. Small amounts swallowed incidentally as a result of normal 

handling operations are not likely to cause injury; however, swallowing larger amounts may cause 

injury. 

Aspiration hazard: Based on physical properties, not likely to be an aspiration hazard. 

Cancer Information: Findings from a chronic diethanolamine skin painting study by NTP include liver 

and kidney tumors in mice; no tumors were observed in rats. Mechanistic studies indicate that tumor 

formation is of questionable relevance to humans. 

Birth Defects/Developmental Effects: Contains component(s) which, in laboratory animals, have 

been toxic to the fetus only at doses toxic to the mother. 

Component CAS # Amount

Polyether Polyol Blend Trade secret > 80.0 %

Triethanolamine 102-71-6 >= 1.0 - <= 3.0 %

N,N-Diethanolamine 111-42-2 >= 0.1 - <= 1.0 %

4. First-aid measures

Description of first aid measures

General advice: First Aid responders should pay attention to self-protection and use the 

recommended protective clothing (chemical resistant gloves, splash protection). If potential for 

exposure exists refer to Section 8 for specific personal protective equipment. 

Inhalation: Move person to fresh air; if effects occur, consult a physician. 

Skin Contact: Remove material from skin immediately by washing with soap and plenty of water. 

Remove contaminated clothing and shoes while washing. Seek medical attention if irritation persists. 

Wash clothing before reuse. Discard items which cannot be decontaminated, including leather articles 

such as shoes, belts and watchbands. 

Eye Contact: Flush eyes thoroughly with water for several minutes. Remove contact lenses after the 

initial 1-2 minutes and continue flushing for several additional minutes. If effects occur, consult a 

physician, preferably an ophthalmologist. Suitable emergency eye wash facility should be available in 

work area. 

Ingestion: If swallowed, seek medical attention. Do not induce vomiting unless directed to do so by 

medical personnel. 

Most important symptoms and effects, both acute and delayed

Aside from the information found under Description of first aid measures (above) and Indication of 

immediate medical attention and special treatment needed (below), no additional symptoms and 

effects are anticipated.

Indication of immediate medical attention and special treatment needed

No specific antidote. Treatment of exposure should be directed at the control of symptoms and the 

clinical condition of the patient. 

5. Fire Fighting Measures

Suitable extinguishing media

3. Composition Information
Product Name: SPECFLEX* NF 657 Polyol DA Issue Date: 09/07/2012

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Water fog or fine spray. Dry chemical fire extinguishers. Carbon dioxide fire extinguishers. Foam. 

Alcohol resistant foams (ATC type) are preferred. General purpose synthetic foams (including AFFF) 

or protein foams may function, but will be less effective. 

Extinguishing Media to Avoid: Do not use direct water stream. May spread fire. 

Special hazards arising from the substance or mixture

Hazardous Combustion Products: During a fire, smoke may contain the original material in addition 

to combustion products of varying composition which may be toxic and/or irritating. Combustion 

products may include and are not limited to: Nitrogen oxides. Carbon monoxide. Carbon dioxide. 

Unusual Fire and Explosion Hazards: Container may rupture from gas generation in a fire situation. 

Violent steam generation or eruption may occur upon application of direct water stream to hot liquids. 

Advice for firefighters

Fire Fighting Procedures: Keep people away. Isolate fire and deny unnecessary entry. Use water 

spray to cool fire exposed containers and fire affected zone until fire is out and danger of reignition has 

passed. Fight fire from protected location or safe distance. Consider the use of unmanned hose 

holders or monitor nozzles. Immediately withdraw all personnel from the area in case of rising sound 

from venting safety device or discoloration of the container. Do not use direct water stream. May 

spread fire. Move container from fire area if this is possible without hazard. Burning liquids may be 

moved by flushing with water to protect personnel and minimize property damage. Contain fire water 

run-off if possible. Fire water run-off, if not contained, may cause environmental damage. Review the 

"Accidental Release Measures" and the "Ecological Information" sections of this (M)SDS. 

Special Protective Equipment for Firefighters: Wear positive-pressure self-contained breathing 

apparatus (SCBA) and protective fire fighting clothing (includes fire fighting helmet, coat, trousers, 

boots, and gloves). Avoid contact with this material during fire fighting operations. If contact is likely, 

change to full chemical resistant fire fighting clothing with self-contained breathing apparatus. If this is 

not available, wear full chemical resistant clothing with self-contained breathing apparatus and fight fire 

from a remote location. For protective equipment in post-fire or non-fire clean-up situations, refer to 

the relevant sections. 

6. Accidental Release Measures

Personal precautions, protective equipment and emergency procedures: Isolate area. Keep 

unnecessary and unprotected personnel from entering the area. Spilled material may cause a slipping 

hazard. Refer to Section 7, Handling, for additional precautionary measures. Use appropriate safety 

equipment. For additional information, refer to Section 8, Exposure Controls and Personal Protection. 

Environmental precautions: Prevent from entering into soil, ditches, sewers, waterways and/or 

groundwater. See Section 12, Ecological Information. 

Methods and materials for containment and cleaning up: Contain spilled material if possible. 

Absorb with materials such as: Dirt. Sand. Sawdust. Collect in suitable and properly labeled 

containers. Wash the spill site with water. See Section 13, Disposal Considerations, for additional 

information. 

7. Handling and Storage

Handling

General Handling: Avoid contact with eyes. Wash thoroughly after handling. Keep container closed. 

This material is hygroscopic in nature. See Section 8, EXPOSURE CONTROLS AND PERSONAL 

PROTECTION. 

Other Precautions: Spills of these organic materials on hot fibrous insulations may lead to lowering of 

the autoignition temperatures possibly resulting in spontaneous combustion. 
Product Name: SPECFLEX* NF 657 Polyol DA Issue Date: 09/07/2012

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Storage

Protect from atmospheric moisture. Store in a dry place. Avoid prolonged exposure to heat and air. 

Store in the following material(s): Carbon steel. Stainless steel. Polypropylene. Polyethylene-lined 

container. Teflon. Glass-lined container. Aluminum. Plasite 3066 lined container. Plasite 3070 lined 

container. 316 stainless steel. See Section 10 for more specific information. 

Storage Period: Storage temperature:

6 Months 15 - 25 °C

8. Exposure Controls / Personal Protection

Exposure Limits

Component List Type Value

|

Triethanolamine ACGIH TWA 5 mg/m3 

|

N,N-Diethanolamine ACGIH TWA

Inhalable 

fraction and 

vapor.

1 mg/m3 SKIN 

A "skin" notation following the inhalation exposure guideline refers to the potential for dermal 

absorption of the material including mucous membranes and the eyes either by contact with vapors or 

by direct skin contact.

It is intended to alert the reader that inhalation may not be the only route of exposure and that 

measures to minimize dermal exposures should be considered.

Personal Protection

Eye/Face Protection: Use safety glasses (with side shields). 

Skin Protection: Wear clean, body-covering clothing. 

Hand protection: Use gloves chemically resistant to this material when prolonged or 

frequently repeated contact could occur. Examples of preferred glove barrier materials 

include: Butyl rubber. Natural rubber ("latex"). Neoprene. Nitrile/butadiene rubber ("nitrile" or 

"NBR"). Polyethylene. Ethyl vinyl alcohol laminate ("EVAL"). Polyvinyl alcohol ("PVA"). 

Polyvinyl chloride ("PVC" or "vinyl"). NOTICE: The selection of a specific glove for a particular 

application and duration of use in a workplace should also take into account all relevant 

workplace factors such as, but not limited to: Other chemicals which may be handled, physical 

requirements (cut/puncture protection, dexterity, thermal protection), potential body reactions 

to glove materials, as well as the instructions/specifications provided by the glove supplier. 

Respiratory Protection: Respiratory protection should be worn when there is a potential to exceed 

the exposure limit requirements or guidelines. If there are no applicable exposure limit requirements 

or guidelines, wear respiratory protection when adverse effects, such as respiratory irritation or 

discomfort have been experienced, or where indicated by your risk assessment process. For most 

conditions no respiratory protection should be needed; however, if discomfort is experienced, use an 

approved air-purifying respirator. The following should be effective types of air-purifying respirators: 

Organic vapor cartridge with a particulate pre-filter. 

Ingestion: Use good personal hygiene. Do not consume or store food in the work area. Wash hands 

before smoking or eating. 

Engineering Controls

Ventilation: Use local exhaust ventilation, or other engineering controls to maintain airborne levels 

below exposure limit requirements or guidelines. If there are no applicable exposure limit 

requirements or guidelines, general ventilation should be sufficient for most operations. Local exhaust 

ventilation may be necessary for some operations. 

9. Physical and Chemical Properties

Appearance

 Physical State Liquid.
Product Name: SPECFLEX* NF 657 Polyol DA Issue Date: 09/07/2012

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 Color White to off-white

Odor Characteristic

Odor Threshold No test data available

pH No test data available

Melting Point No test data available

Freezing Point No test data available

Boiling Point (760 mmHg) No test data available. 

Flash Point - Closed Cup > 100 °C (> 212 °F) Estimated.

Evaporation Rate (Butyl 

Acetate = 1)

No test data available

Flammability (solid, gas) Not applicable to liquids 

Flammable Limits In Air Lower: No test data available 

Upper: No test data available 

Vapor Pressure No test data available 

Vapor Density (air = 1) No test data available

Specific Gravity (H2O = 1) 1.10 - 1.15 ASTM D891 

Solubility in water (by 

weight)

Partially soluble

Partition coefficient, noctanol/water (log Pow)

No data available for this product. See Section 12 for individual 

component data.

Autoignition Temperature No test data available

Decomposition 

Temperature

No test data available

Kinematic Viscosity No test data available

Explosive properties Not explosive 

Oxidizing properties No 

10. Stability and Reactivity

Reactivity

No dangerous reaction known under conditions of normal use.

Chemical stability

Stable under recommended storage conditions. See Storage, Section 7. 

Possibility of hazardous reactions

Polymerization will not occur by itself. 

Conditions to Avoid: Product can oxidize at elevated temperatures. Generation of gas during 

decomposition can cause pressure in closed systems. 

Incompatible Materials: Avoid contact with oxidizing materials. Avoid contact with: Strong acids. 

Strong bases. Avoid unintended contact with isocyanates. The reaction of polyols and isocyanates 

generates heat. 

Hazardous decomposition products

Decomposition products depend upon temperature, air supply and the presence of other materials. 

Decomposition products can include and are not limited to: Carbon dioxide. Alcohols. Ethers. 

Hydrocarbons. Ketones. Polymer fragments. 

11. Toxicological Information

Acute Toxicity

Ingestion

As product: Single dose oral LD50 has not been determined. 

Based on information for component(s): Estimated. LD50, rat > 2,000 mg/kg
Product Name: SPECFLEX* NF 657 Polyol DA Issue Date: 09/07/2012

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Dermal

As product: The dermal LD50 has not been determined. 

Based on information for component(s): Estimated. LD50, rabbit > 2,000 mg/kg

Inhalation

As product: The LC50 has not been determined. 

Eye damage/eye irritation

May cause slight temporary eye irritation. May cause slight temporary corneal injury. 

Skin corrosion/irritation

Prolonged exposure not likely to cause significant skin irritation. 

Sensitization

Skin

Contains component(s) which have shown limited potential to produce allergic skin reactions. 

Respiratory

 No relevant data found. 

Repeated Dose Toxicity

No relevant data found. 

Chronic Toxicity and Carcinogenicity

Findings from a chronic diethanolamine skin painting study by NTP include liver and kidney tumors in 

mice; no tumors were observed in rats. Mechanistic studies indicate that tumor formation is of 

questionable relevance to humans. 

Carcinogenicity Classifications:

Component List Classification

N,N-Diethanolamine IARC Possibly carcinogenic to humans.; 2B

ACGIH Confirmed animal carcinogen with 

unknown relevance to humans.; Group A3

Developmental Toxicity

Contains component(s) which, in laboratory animals, have been toxic to the fetus only at doses toxic to 

the mother. 

Reproductive Toxicity

No relevant data found. 

Genetic Toxicology

No relevant data found. 

12. Ecological Information

Toxicity

Data for Component: Triethanolamine

Material is practically non-toxic to aquatic organisms on an acute basis 

(LC50/EC50/EL50/LL50 >100 mg/L in the most sensitive species tested). May increase pH of 

aquatic systems to > pH 10 which may be toxic to aquatic organisms. 

Fish Acute & Prolonged Toxicity

LC50, Pimephales promelas (fathead minnow), flow-through test, 96 h: 11,800 mg/l

Aquatic Invertebrate Acute Toxicity

EC50, Ceriodaphnia Dubia (water flea), static test, 48 h, immobilization: 609.9 mg/l

Aquatic Plant Toxicity

ErC50, alga Scenedesmus sp., static test, Growth rate inhibition, 72 h: 512 mg/l

Toxicity to Micro-organisms

EC50, OECD 209 Test; activated sludge, 3 h: > 1,000 mg/l

Aquatic Invertebrates Chronic Toxicity Value

Daphnia magna (Water flea), semi-static test, 21 d, number of offspring, NOEC: 16 mg/l, 

LOEC: 31 mg/l

Data for Component: N,N-Diethanolamine

Material is moderately toxic to aquatic organisms on an acute basis (LC50/EC50 between 1 

and 10 mg/L in the most sensitive species tested). May increase pH of aquatic systems to > 

pH 10 which may be toxic to aquatic organisms. 
Product Name: SPECFLEX* NF 657 Polyol DA Issue Date: 09/07/2012

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Fish Acute & Prolonged Toxicity

LC50, Pimephales promelas (fathead minnow), static test, 96 h: 1,460 mg/l

Aquatic Invertebrate Acute Toxicity

EC50, Daphnia magna (Water flea), static test, 48 h: 55 mg/l

Aquatic Plant Toxicity

ErC50, Pseudokirchneriella subcapitata (green algae), Growth rate inhibition, 96 h: 2.2 mg/l

Toxicity to Micro-organisms

EC50, OECD 209 Test; activated sludge, 3 h: > 1,000 mg/l

Aquatic Invertebrates Chronic Toxicity Value

Daphnia magna (Water flea), semi-static test, 21 d, NOEC: 0.78 mg/l, LOEC: 1.56 mg/l

Data for Component: Copolymer dispersion in polyether polyol

For similar material(s): Material is practically non-toxic to aquatic invertebrates on an acute 

basis (LC50/EC50 > 100 mg/L). 

Data for Component: Polyether polyol "C"

For this family of materials: Material is practically non-toxic to aquatic organisms on an acute 

basis (LC50/EC50/EL50/LL50 >100 mg/L in the most sensitive species tested). 

Data for Component: Polyether polyol "F"

Based on information for a similar material: Material is practically non-toxic to aquatic 

organisms on an acute basis (LC50/EC50/EL50/LL50 >100 mg/L in the most sensitive species 

tested). 

Persistence and Degradability

Data for Component: Triethanolamine

Material is readily biodegradable. Passes OECD test(s) for ready biodegradability. Material is 

ultimately biodegradable (reaches > 70% biodegradation in OECD test(s) for inherent 

biodegradability). 

OECD Biodegradation Tests:

Biodegradation Exposure Time Method 10 Day Window

97 % 28 d OECD 301A Test pass

89 % 14 d OECD 302B Test Not applicable

Indirect Photodegradation with OH Radicals

Rate Constant Atmospheric Half-life Method

1.1053E-10 cm3/s 0.097 d Estimated.

Theoretical Oxygen Demand: 2.04 mg/mg

Data for Component: N,N-Diethanolamine

Material is readily biodegradable. Passes OECD test(s) for ready biodegradability. Material is 

ultimately biodegradable (reaches > 70% biodegradation in OECD test(s) for inherent 

biodegradability). 

OECD Biodegradation Tests:

Biodegradation Exposure Time Method 10 Day Window

93 % 28 d OECD 301F Test pass

Indirect Photodegradation with OH Radicals

Rate Constant Atmospheric Half-life Method

8.90E-11 cm3/s 0.167 d Estimated.

Theoretical Oxygen Demand: 2.13 mg/mg

Data for Component: Copolymer dispersion in polyether polyol

The polymeric component is not expected to biodegrade. 

Data for Component: Polyether polyol "C"

For this family of materials: Material is readily biodegradable. Passes OECD test(s) for ready 

biodegradability. 

Data for Component: Polyether polyol "F"

Based on information for a similar material: Material is expected to be readily biodegradable. 
Product Name: SPECFLEX* NF 657 Polyol DA Issue Date: 09/07/2012

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Bioaccumulative potential

Data for Component: Triethanolamine

Bioaccumulation: Bioconcentration potential is low (BCF < 100 or Log Pow < 3). 

Partition coefficient, n-octanol/water (log Pow): -2.3 Measured

Bioconcentration Factor (BCF): < 3.9; Cyprinus carpio (Carp); Measured

Data for Component: N,N-Diethanolamine

Bioaccumulation: Bioconcentration potential is low (BCF < 100 or Log Pow < 3). 

Partition coefficient, n-octanol/water (log Pow): -2.18 Shake flask (OECD 107 Test)

Data for Component: Copolymer dispersion in polyether polyol

Bioaccumulation: No bioconcentration of the polymeric component is expected because of 

its high molecular weight.

Data for Component: Polyether polyol "C"

Bioaccumulation: No bioconcentration is expected because of the relatively high molecular 

weight (MW greater than 1000). 

Data for Component: Polyether polyol "F"

Bioaccumulation: No bioconcentration is expected because of the relatively high molecular 

weight (MW greater than 1000). 

Mobility in soil

Data for Component: Triethanolamine

Mobility in soil: Potential for mobility in soil is very high (Koc between 0 and 50).

Partition coefficient, soil organic carbon/water (Koc): 10 Estimated.

Henry's Law Constant (H): 1.91E-04 atm*m3/mole Measured

Distribution in Environment: Mackay Level 1 Fugacity Model: 

Air Water. Biota Soil Sediment

< 1 % > 99 % < 1 % < 1 % < 1 %

Data for Component: N,N-Diethanolamine

Mobility in soil: Given its very low Henry's constant, volatilization from natural bodies of water 

or moist soil is not expected to be an important fate process., Potential for mobility in soil is 

very high (Koc between 0 and 50).

Partition coefficient, soil organic carbon/water (Koc): 1 Estimated.

Henry's Law Constant (H): 5.35E-14 atm*m3/mole; 25 °C Measured

Data for Component: Copolymer dispersion in polyether polyol

Mobility in soil: No data available.

Data for Component: Polyether polyol "C"

Mobility in soil: No data available.

Data for Component: Polyether polyol "F"

Mobility in soil: No data available.

13. Disposal Considerations

DO NOT DUMP INTO ANY SEWERS, ON THE GROUND, OR INTO ANY BODY OF WATER. All 

disposal practices must be in compliance with all Federal, State/Provincial and local laws and 

regulations. Regulations may vary in different locations. Waste characterizations and compliance with 

applicable laws are the responsibility solely of the waste generator. AS YOUR SUPPLIER, WE HAVE 

NO CONTROL OVER THE MANAGEMENT PRACTICES OR MANUFACTURING PROCESSES OF 

PARTIES HANDLING OR USING THIS MATERIAL. THE INFORMATION PRESENTED HERE 

PERTAINS ONLY TO THE PRODUCT AS SHIPPED IN ITS INTENDED CONDITION AS 

DESCRIBED IN MSDS SECTION: Composition Information. FOR UNUSED & UNCONTAMINATED 

PRODUCT, the preferred options include sending to a licensed, permitted: Recycler. Reclaimer. 

Incinerator or other thermal destruction device. For additional information, refer to: Handling & 

Storage Information, MSDS Section 7 Stability & Reactivity Information, MSDS Section 10 Regulatory 

Information, MSDS Section 15 
Product Name: SPECFLEX* NF 657 Polyol DA Issue Date: 09/07/2012

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14. Transport Information

DOT Non-Bulk

NOT REGULATED

DOT Bulk

Proper Shipping Name: ENVIRONMENTALLY HAZARDOUS SUBSTANCES, LIQUID, N.O.S

Technical Name: DIETHANOLAMINE

Hazard Class: 9 ID Number: UN3082 Packing Group: PG III

IMDG

NOT REGULATED

ICAO/IATA

NOT REGULATED

Additional Information

Reportable quantity: – 100 lb - DIETHANOLAMINE-RQ

This information is not intended to convey all specific regulatory or operational 

requirements/information relating to this product. Additional transportation system information can be 

obtained through an authorized sales or customer service representative. It is the responsibility of the 

transporting organization to follow all applicable laws, regulations and rules relating to the 

transportation of the material. 

15. Regulatory Information

OSHA Hazard Communication Standard

This product is a "Hazardous Chemical" as defined by the OSHA Hazard Communication Standard, 29 

CFR 1910.1200.

Superfund Amendments and Reauthorization Act of 1986 Title III (Emergency Planning 

and Community Right-to-Know Act of 1986) Sections 311 and 312

Immediate (Acute) Health Hazard No

Delayed (Chronic) Health Hazard Yes

Fire Hazard No

Reactive Hazard No

Sudden Release of Pressure Hazard No

Superfund Amendments and Reauthorization Act of 1986 Title III (Emergency Planning and 

Community Right-to-Know Act of 1986) Section 313

To the best of our knowledge, this product does not contain chemicals at levels which require reporting 

under this statute.

Pennsylvania (Worker and Community Right-To-Know Act): Pennsylvania Hazardous 

Substances List and/or Pennsylvania Environmental Hazardous Substance List:

The following product components are cited in the Pennsylvania Hazardous Substance List and/or the 

Pennsylvania Environmental Substance List, and are present at levels which require reporting.

Component CAS # Amount

Triethanolamine 102-71-6 >= 1.0 - <= 3.0 %

Pennsylvania (Worker and Community Right-To-Know Act): Pennsylvania Special Hazardous 

Substances List:

To the best of our knowledge, this product does not contain chemicals at levels which require reporting 

under this statute.

California Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1986)

WARNING: This product contains a chemical(s) known to the State of California to cause cancer.
Product Name: SPECFLEX* NF 657 Polyol DA Issue Date: 09/07/2012

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Component CAS # Amount

N,N-Diethanolamine 111-42-2 >= 0.1 - <= 1.0 %

Nickel 7440-02-0 <= 0.01 PPM

Cadmium 7440-43-9 <= 0.005 PPM

Cobalt 7440-48-4 <= 0.005 PPM

California Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1986)

WARNING: This product contains a chemical(s) known to the State of California to cause birth defects 

or other reproductive harm.

Component CAS # Amount

Cadmium 7440-43-9 <= 0.005 PPM

US. Toxic Substances Control Act

All components of this product are on the TSCA Inventory or are exempt from TSCA Inventory 

requirements under 40 CFR 720.30

CEPA - Domestic Substances List (DSL)

All substances contained in this product are listed on the Canadian Domestic Substances List (DSL) or 

are not required to be listed.

16. Other Information

Product Literature

Additional information on this product may be obtained by calling your sales or customer service 

contact.

Recommended Uses and Restrictions

Identified uses

Component(s) for the manufacture of urethane polymers. We recommend that you use this product in 

a manner consistent with the listed use. If your intended use is not consistent with the stated use, 

please contact your sales or technical service representative. 

Revision

Identification Number: 73481 / 1001 / Issue Date 09/07/2012 / Version: 4.0

Most recent revision(s) are noted by the bold, double bars in left-hand margin throughout this 

document. 

Legend

N/A Not available

W/W Weight/Weight

OEL Occupational Exposure Limit

STEL Short Term Exposure Limit

TWA Time Weighted Average

ACGIH American Conference of Governmental Industrial Hygienists, Inc.

DOW IHG Dow Industrial Hygiene Guideline

WEEL Workplace Environmental Exposure Level

HAZ_DES Hazard Designation

Action Level A value set by OSHA that is lower than the PEL which will trigger the need for 

activities such as exposure monitoring and medical surveillance if exceeded.

The Dow Chemical Company urges each customer or recipient of this (M)SDS to study it carefully and 

consult appropriate expertise, as necessary or appropriate, to become aware of and understand the 

data contained in this (M)SDS and any hazards associated with the product. The information herein is 

provided in good faith and believed to be accurate as of the effective date shown above. However, no 

warranty, express or implied, is given. Regulatory requirements are subject to change and may differ 

between various locations. It is the buyer's/user's responsibility to ensure that his activities comply with 

all federal, state, provincial or local laws. The information presented here pertains only to the product 

as shipped. Since conditions for use of the product are not under the control of the manufacturer, it is 
Product Name: SPECFLEX* NF 657 Polyol DA Issue Date: 09/07/2012

Page 11 of 11

the buyer's/user's duty to determine the conditions necessary for the safe use of this product. Due to 

the proliferation of sources for information such as manufacturer-specific (M)SDSs, we are not and 

cannot be responsible for (M)SDSs obtained from any source other than ourselves. If you have 

obtained an (M)SDS from another source or if you are not sure that the (M)SDS you have is current, 

please contact us for the most current version.