Product Name: Dow 3019 Isocyanate Issue Date: 07/13/2010

Print Date: 21 Jan 2011

®(TM)*Trademark of The Dow Chemical Compan y ("Dow") or an affiliated company of Dow

Page 1 of 9 The Dow Chemical Company encourages and expects you to read and understand the entire (M)SDS, as there is important information throughout the docu ment. 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 Dow 3019 Isocyanate

COMPANY IDENTIFICATION The Dow Chemical Company

2030 Willard H. Dow Center
Midland, MI 48674

USA

Customer Information Number: 800-258-2436



### EMERGENCY TELEPHONE NUMBER 24-Hour Emergency Contact: 989-636-4400 Local Emergency Contact: 989-636-4400



## 2. Hazards Identification

Emergency Overview

Color: Brown Physical State: Liquid.

Odor: Musty Hazards of product:

WARNING! May cause allergic skin reaction. May cause allergic respiratory reaction. May cause eye irritation. May cause skin irritation. May cause respiratory tract irritation. May cause lung injury. Sprayed or heated material harmful if inhaled. May react with water. Elevated temperatures can cause hazardous polymerization. Material reacts slowly with water, releasing carbon dioxide which can cause pressure buildup and rupture of closed containers. Elevated temperatures accelerate this reaction. Toxic fumes may be released in fire situations. Isolate area. Keep upwind of spill. Stay out of low areas.



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

CFR 1910.1200. 

# Material Safety Data Sheet

The Dow Chemical CompanyProduct Name: Dow 3019 Isocyanate Issue Date: 07/13/2010

Page 2 of 9 

### Potential Health Effects Eye Contact: May cause moderate eye irritation. May cause slight temporary corneal injury.

Skin Contact: Prolonged contact may cause slight skin irritation with local redness. May stain skin. Skin Absorption: Prolonged skin contact is unlikely to result in absorption of harmful amounts.

Skin Sensitization: Skin contact may cause an allergic skin reaction. Animal studies have shown that skin contact with isocyanates may play a role in respiratory sensitization.

Inhalation: At room temperature, vapors are minimal due to low volatility. However, certain operations may generate vapor or mist concentrations sufficient to cause respiratory irritation and other adverse effects. Such operations include those in which the material is heated, sprayed or otherwise mechanically dispersed such as drumming, venting or pumping. Excessive exposure may cause irritation to upper respiratory tract (nose and throat) and lungs. May cause pulmonary edema (fluid in the lungs.) Effects may be delayed. Decreased lung function has been associated with overexposure to isocyanates. Respiratory Sensitization: May cause allergic respiratory response. MDI concentrations below the exposure guidelines may cause allergic respiratory reactions in individuals already sensitized. Asthma-like symptoms may include coughing, difficult br eathing and a feeling of tightness in the chest. Occasionally, breathing difficulties may be life threatening. 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. Effects of Repeated Exposure: Tissue injury in the upper respiratory tract and lungs has been observed in laboratory animals after repeated exce ssive exposures to MDI/polymeric MDI aerosols.

Cancer Information: Lung tumors have been observed in laboratory animals exposed to respirable aerosol droplets of MDI/Polymeric MDI (6 mg/m3) for their lifetime. Tumors occurred concurrently with respiratory irritation and lung injury. Current exposure guidelines are expected to protect against these effects reported for MDI. Birth Defects/Developmental Effects: In laboratory animals, MDI/polymeric MDI did not cause birth defects; other fetal effects occurred only at high doses which were toxic to the mother.



### Component CAS # Amount

Diphenylmethane Diisocyanate, isomers and homologues 9016-87-9 100.0 % 4,4' -Methylenediphenyl diisocyanate 101-68-8 40.0 - 50.0 %

Note: CAS 101-68-8 is an MDI isomer that is part of CAS 9016-87-9.



## 4. First-aid measures

Eye Contact: Immediately flush eyes with water; remove contact lenses, if present, after the first 5 minutes, then continue flushing eyes for at least 15 minutes. Obtain medical attention without delay, preferably from an ophthalmologist. Eye wash fountain should be located in immediate work area.

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. An MDI skin decontamination study demonstrated that cleaning very soon after exposure is important, and that a polyglycol-based skin cleanser or corn oil may be more effective than soap and water. Discard items which cannot be decontaminated, including leather articles such as shoes, belts and watchbands. Safety shower should be located in immediate work

area. Inhalation: Move person to fresh air. If not breathing, give artificial respiration; if by mouth to mouth use rescuer protection (pocket mask, etc). If breathing is difficult, oxygen should be administered by qualified personnel. Call a physician or transport to a medical facility. Ingestion: If swallowed, seek medical attention. Do not induce vomiting unless directed to do so by medical personnel. Notes to Physician: Maintain adequate ventilation and oxygenation of the patient. May cause respiratory sensitization or asthma-like symptoms. Bronchodilators, expectorants and antitussives 

## 3. Composition InformationProduct Name: Dow 3019 Isocyanate Issue Date: 07/13/2010

Page 3 of 9 may be of help. Treat bronchospasm with inhaled beta2 agonist and oral or parenteral corticosteroids. Respiratory symptoms, including pulmonary edema, may be delayed. Persons receiving significant exposure should be observed 24-48 hours for signs of respiratory distress. If you are sensitized to diisocyanates, consult your physician regarding working with other respiratory irritants or sensitizers. Treatment of exposure should be directed at the control of symptoms and the clinical condition of the patient. Medical Conditions Aggravated by Exposure: Excessive exposure may aggravate preexisting asthma and other respiratory disorders (e.g. emphysema, bronchitis, reactive airways dysfunction syndrome). Emergency Personnel Protection: 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.



## 5. Fire Fighting Measures

Extinguishing Media: Water fog or fine spray. Dry chemical fire extinguishers. Carbon dioxide fire extinguishers. Foam. Do not use direct water stream. May spread fire. Alcohol resistant foams (ATC type) are preferred. General purpose synthetic foam s (including AFFF) or protein foams may function,

but will be less effective. Fire Fighting Procedures: Keep people away. Isolate fire and deny unnecessary entry. Stay upwind. Keep out of low areas where gases (fumes) can accumulate. Water is not recommended, but may be applied in large quantities as a fine spray when other extinguishing agents are not available. Do not use direct water stream. May spread fire. Fi ght 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. Move container from fire area if this is possible without hazard. Use water spray to cool fire-exposed

containers and fire-affected zone until fire is out. Contain fire water run-off if possible. Fire water runoff, 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 clothi ng 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. Unusual Fire and Explosion Hazards: Product reacts with water. Reaction may produce heat and/or gases. This reaction may be violent. 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. Dense smoke is produced when product burns.

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. Isocyanates. Hydrogen cyanide.

Carbon monoxide. Carbon dioxide.



## 6. Accidental Release Measures

Steps to be Taken if Material is Released or Spilled: Contain spilled material if possible. Absorb

with materials such as: Dirt. Vermiculite. Sand . Clay. Do NOT use absorbent materials such as: Cement powder (Note: may generate heat). Collect in suitable and properly labeled open containers. Do not place in sealed containers. Suitable containers include: Metal drums. Plastic drums. Polylined fiber pacs. Wash the spill site with large qu antities of water. Attempt to neutralize by adding

suitable decontaminant solution: Formulation 1: sodi um carbonate 5 - 10%; liquid detergent 0.2 - 2%; water to make up to 100%, OR Formulation 2: concentrated ammonia solution 3 - 8%; liquid detergent 0.2 - 2%; water to make up to 100%. If ammonia is used, use good ventilation to prevent vapor exposure. Contact Dow for clean-up assistance. See Section 13, Disposal Considerations, for

additional information.Product Name: Dow 3019 Isocyanate Issue Date: 07/13/2010

Page 4 of 9 Personal Precautions: Isolate area. Keep unnecessary and unprotected personnel from entering the area. Keep personnel out of low areas. Keep upwind of spill. Spilled material may cause a slipping hazard. Ventilate area of leak or sp ill. If available, use foam to smother or suppress. Refer to Section 7, Handling, for additional precautionary measures. See Section 10 for more specific information. Use appropriate safety equipment. For additional informat ion, 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.



## 7. Handling and Storage

Handling General Handling: Avoid breathing vapor. Avoid contact with eyes, skin, and clothing. Avoid prolonged or repeated contact with skin. Use with adequate ventilation. Wash thoroughly after handling. Keep container tightly closed. See Section 8, EXPOSURE CONTROLS AND PERSONAL

PROTECTION.

Other Precautions: Spills of these organic materials on hot fi brous insulations may lead to lowering of the autoignition temperatures possibly resulting in spontaneous combustion.



### Storage Store in a dry place. Protect from atmospheric mo isture. Do not store product contaminated with water to prevent potential hazardous reaction. See Section 10 for more specific information. Additional storage and handling information on this product may be obtained by calling your sales or

customer service contact.

Shelf life: Use within Storage temperature:

6 Months 24 - 41 °C



## 8. Exposure Controls / Personal Protection

Exposure Limits
Component List Type Value

|| 4,4' -Methylenediphenyl diisocyanate ACGIH TWA 0.005 ppm

OSHA Table

Z-1 Ceiling 0.2 mg/m3 0.02 ppm



### Personal Protection Eye/Face Protection: Use chemical goggles.

Skin Protection: Use protective clothing chemically resistant to this material. Selection of specific items such as face shield, boots, apron, or full body suit will depend on the task. Hand protection: Use gloves chemically resistant to this material. Examples of preferred glove barrier materials include: Butyl rubber. Polyethylene. Chlorinated polyethylene. Ethyl vinyl alcohol laminate ("EVAL"). Examples of acceptable glove barrier materials include: Viton. Neoprene. Polyvinyl chloride ("PVC" or "vinyl"). Nitrile/butadiene rubber ("nitrile" or "NBR"). NOTICE: The selection of a specific gl ove 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: Atmospheric levels should be maintained below the exposure guideline. When atmospheric levels may exceed the exposure guideline, use an approved air-purifying respirator equipped with an organic vapor sorbent and a particle filter. For situations where the atmospheric levels may exceed the level for which an air-purifying respirator is effective, use a positive-pressureProduct Name: Dow 3019 Isocyanate Issue Date: 07/13/2010

Page 5 of 9 air-supplying respirator (air line or self-contained breathing apparatus). For emergency response orfor situations where the atmospheric level is unknown, use an approved positive-pressure selfcontained breathing apparatus or positive-pressure ai r line with auxiliary self-contained air supply. 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 only with adequate ventilation. Provide general and/or local exhaust ventilation to control airborne levels below the exposure guidelines. Exhaust systems should be designed to move the air away from the source of vapor/aerosol generation and people working at this point. The odor and irritancy of this material are inadequate to warn of excessive exposure. Local exhaust ventilation may be necessary for some operations.



## 9. Physical and Chemical Properties

Physical State Liquid.

Color Brown

Odor Musty

Odor Threshold 0.4 ppm Literature Odor is inadequate warning of excessive exposure. Flash Point - Closed Cup > 204 °C (> 399 °F) Vendor Flammability (solid, gas) Not applicable to liquids

Flammable Limits In Air Lower : No test data available Upper : No test data available Autoignition Temperature No test data available Vapor Pressure < 0.00001 mmHg @ 25 °C Literature Boiling Point (760 mmHg) decomposes prior to boiling. Vapor Density (air = 1) 8.5 Literature Specific Gravity (H2O = 1) 1.24 Vendor Freezing Point forms crystals below 10oC Melting Point Not applicable Solubility in water (by weight) insoluble, reacts, evolution of CO2

pH Not applicable Molecular Weight Not applicable Decomposition Temperature > 230 °C(> 446 °F) Literature

Partition coefficient, noctanol/water (log Pow) No data available for this product.

Evaporation Rate (Butyl Acetate = 1) No test data available

Kinematic Viscosity No test data available



## 10. Stability and Reactivity

Stability/Instability Stable under recommended storage conditions. See Storage, Section 7.

Conditions to Avoid: Exposure to elevated temperatures can cause product to decompose. Generation of gas during decomposition can cause pressure in closed systems. Pressure build-up can be rapid. Avoid moisture. Material reacts slowly with water, releasing carbon dioxide which can cause pressure buildup and rupture of closed containers. Elevated temperatures accelerate this

reaction.

Incompatible Materials: Avoid contact with: Acids. Alcohols. Amines. Water. Ammonia. Bases. Metal compounds. Moist air. Strong oxidizers. Diisocyanates react with many materials and the rateProduct Name: Dow 3019 Isocyanate Issue Date: 07/13/2010

Page 6 of 9 of reaction increases with temperature as well as increased contact; these reactions can become violent. Contact is increased by stirring or if the other material mixes with the diisocyanate. Diisocyanates are not soluble in water and sink to the bottom, but react slowly at the interface. The reaction forms carbon dioxide gas and a layer of solid polyurea. Reaction with water will generate

carbon dioxide and heat. Avoid contact with metals su ch as: Aluminum. Zinc. Brass. Tin. Copper. Galvanized metals. Avoid contact with absorbent materials such as: Moist organic absorbents. Avoid unintended contact with polyols. The reaction of polyols and isocyanates generate heat.



### Hazardous Polymerization Can occur. Elevated temperatures can cause hazardous polymerization. Polymerization can be catalyzed by: Strong bases. Water.



### Thermal Decomposition Decomposition products depend upon temperature, air supply and the presence of other materials. Gases are released during decomposition.



## 11. Toxicological Information

Acute Toxicity Ingestion Typical for this family of materials. LD50, Rat > 10,000 mg/kg

Dermal Typical for this family of materials. LD50, Rabbit > 2,000 mg/kg

Inhalation LC50, Aerosol

, Rat 490 mg/m3 

### Eye damage/eye irritation
May cause moderate eye irritation. May cause slight temporary corneal injury.


### Skin corrosion/irritation
Prolonged contact may cause slight skin irritation with local redness. May stain skin.


### Sensitization

Skin Skin contact may cause an allergic skin reaction. Animal studies have shown that skin contact with isocyanates may play a role in respiratory sensitization. Respiratory May cause allergic respiratory response. MDI concentrations below the exposure guidelines may cause allergic respiratory reactions in individual s already sensitized. Asthma-like symptoms may include coughing, difficult breathing and a feeling of tightness in the chest. Occasionally, breathing difficulties may be life threatening. 

### Repeated Dose Toxicity Tissue injury in the upper respiratory tract and lungs has been observed in laboratory animals after repeated excessive exposures to MDI/polymeric MDI aerosols. 

### Chronic Toxicity and Carcinogenicity Lung tumors have been observed in laboratory animals exposed to respirable aerosol droplets of MDI/Polymeric MDI (6 mg/m3) for their lifetime. Tumors occurred concurrently with respiratory irritation and lung injury. Current exposure guidelines are expected to protect against these effects reported for MDI. 

### Developmental Toxicity In laboratory animals, MDI/polymeric MDI did not cause birth defects; other fetal effects occurred only at high doses which were toxic to the mother. 

### Reproductive Toxicity

No relevant information found. 

### Genetic Toxicology Genetic toxicity data on MDI are inconclusive. MDI wa s weakly positive in some in vitro studies; other in vitro studies were negative. Animal mutagenicity studies were predominantly negative.Product Name: Dow 3019 Isocyanate Issue Date: 07/13/2010

Page 7 of 9 

## 12. Ecological Information

ENVIRONMENTAL FATE

Movement & Partitioning In the aquatic and terrestrial environment, movement is expected to be limited by its reaction with water forming predominantly insoluble polyureas.



### Persistence and Degradability In the aquatic and terrestrial environment, material reacts with water forming predominantly insoluble polyureas which appear to be stable. In the atmospheric environment, material is expected to have a short tropospheric half-life, based on calculations and by analogy with related diisocyanates.



### ECOTOXICITY The measured ecotoxicity is that of the hydrolyzed product, generally under conditions maximizing production of soluble species. 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).

Toxicity to Soil Dwelling Organisms LC50, Earthworm Eisenia foetida, adult, 14 d: > 1,000 mg/kg



## 13. Disposal Considerations

DO NOT DUMP INTO ANY SEWERS, ON THE GROU ND, 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 th e waste generator. AS YOUR SUPPLIER, WE HAVE

NO CONTROL OVER THE MANAGEMENT PRAC TICES OR MANUFACTURING PROCESSES OF

PARTIES HANDLING OR USING THIS MATERI AL. THE INFORMATION PRESENTED HERE

PERTAINS ONLY TO THE PRODUCT AS SHIP PED 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



## 14. Transport Information

DOT Non-Bulk

NOT REGULATED



### DOT Bulk Proper Shipping Name: OTHER REGULATED SUBSTANCE,LIQUID,N.O.S.

Technical Name: MDI

Hazard Class: 9 ID Number: NA3082 Packing Group: PG III



### IMDG

NOT REGULATED



### ICAO/IATA

NOT REGULATED

Additional Information

Reportable quantity: 10,000 lb

– MDIProduct Name: Dow 3019 Isocyanate Issue Date: 07/13/2010

Page 8 of 9 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 R eauthorization Act of 1986 Title III (Emergency Planning and Community Right-to-Know Act of 1986) Sections 311 and 312 Immediate (Acute) Health Hazard Yes Delayed (Chronic) Health Hazard Yes

Fire Hazard No

Reactive Hazard Yes

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 This product contains the following substances which are subject to the reporting requirements of Section 313 of Title III of the Superfund Amendments and Reauthorization Act of 1986 and which are

listed in 40 CFR 372.

Component CAS # Amount
Diphenylmethane Diisocyanate, isomers and homologues 9016-87-9 100.0%

4,4' -Methylenediphenyl diisocyanate 101-68-8 40.0 - 50.0 %

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 ar e present at levels which require reporting.

Component CAS # Amount
4,4' -Methylenediphenyl diisocyanate 101-68-8 40.0 - 50.0 %

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.

Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA)

Section 103 This product contains the following substances which are subject to CERCLA Section 103 reporting requirements and which are listed in 40 CFR 302.4.

Component CAS # Amount
4,4' -Methylenediphenyl diisocyanate 101-68-8 40.0 - 50.0 %

California Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1986) This product contains no listed substances known to the State of California to cause cancer, birth defects or other reproductive harm, at levels which would require a warning under the statute.

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)Product Name: Dow 3019 Isocyanate Issue Date: 07/13/2010

Page 9 of 9 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 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: 50341 / 0000 / Issue Date 07/13/2010 / Version: 5.0 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 monitori ng 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 associ ated 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 re sponsibility to ensure that hi s 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 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.