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NATIONAL WELDERS SUPPLY -- ARGON - ARGONMATERIAL SAFETY DATA SHEETNSN: 6830002904291Manufacturer's GAGE: 18264Part No. Indicator: BPart Number/Trade Name: ARGON

General Information==--=================:::::=:::====================--=================================================================

Item Name: ARGONCompany's Name: NATIONAL WELDERS SUPPLY CO INCCompany's Street: 810 GESCOCompany's P. O. Box: 31007Company's City: CHARLOTTECompany's State: NC .Company's Country: USCompany's Zip Code: 28231Company's Emerg Ph #: 704-333-5475 800-424-9300(CHEMTREC)Company's Info Ph #: 704-333-5475 800-866-4422Record No. For Safety Entry: 007Tot Safety Entries This Stk#: '009Status: FEDate MSDS Prepared: 01JAN91Safety Data Review Date: 13MAY93Supply Item Manager: CXMSDS Serial Number: BQQFHSpecification Number: MIL-A-18455Hazard Characteristic Code: G3Unit Of Issue: CFUnit Of Issue Container Qty: 243 CUBIC FTType Of Container: CYLINDERNet Unit Weight: UNKNOWNNet Explosive Weight: NKCoast Guard Ammunition Code: NK============================================================

Ingredients/Identity Information===============================================

Proprietary: NOIngredient: ARGONIngredient Sequence Number: 01Percent: >99.9NIOSH (RTECS) Number: C72300000CAS Number: 7440-37-1OSHA PEL: NOT ESTABLISHEDACGIH TLV: NOT ESTABLISHEDOther Recommended Limit: NONE

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Physical/Chemical Characteristics==========================================================~--===========================

Appearance And Odor: GAS;COLORLESS;ODORLESSBoiling Point: -302F/-185CVapor Density (Air=I): 1.6KG/M3Specific Gravity: 1.38Solubility In Water: SLIGHTViscosity: NKRadioactivity: NKAutoignition Temperature: NK=~--================================--==================

Fire and Explosion Hazard Data

Flash Point: NON-FLAMMABLEExtinguishing Media: NONFLAMMABLE, INERT GAS.USE APPROPRIATE MEDIA FORSURROUNDING FIRE.Special Fire Fighting Proc: EVACUATE PERSONNEL.USE WATER SPRAY TO COOLFIRE EXPOSED CYLINDERS.HMIS SUGGESTS ALWAYS USING A SELF-CONTAINEDBREATHING APPARATUS WHEN FIGHTING A CHEMICAL FIRE.Unusual Fire And Expl Hazrds: CONTAINER MAY RUPTURE FROM HEAT.==========================================--=========================

Reactivity Data==--====================================================

Stability: YESCond To Avoid (Stability): NONE SPECIFIED BY MANUFACTURER.Materials To Avoid: NONE SPECIFIED BY MANUFACTURER.Hazardous Decomp Products: NONE SPECIFIED BY MANUFACTURER.Hazardous Poly Occur: NOConditions To Avoid (Poly): NONE.=====-----============================================--=====

Health Hazard Data

LD50-LC50 Mixture: TLV OCCURS WHEN OXYGEN <18 MOL PERCENTRoute Of Entry - Inhalation: YESRoute Of Entry - Skin: NORoute Of Entry - Ingestion: NOHealth Haz Acute And Chronic: ARGON ACTS AS AN ASPHYXIANT;IT DISPLACESOXYGEN. OXYGEN LEVELS SHOULD NOT FALL BELOW 18 MOL PERCENT.Carcinogenicity - NTP: NOCarcinogenicity - IARC: NOCarcinogenicity - OSHA: NOExplanation Carcinogenicity: NOT APPLICABLE.Signs/Symptoms OfOverexp: LOSS OF BALANCE,DIZZINESS,TIGHTNESS IN THEFRONTAL REGION OF THE FOREHEAD,TINGLING IN THETOES,FINGERS,TONGUE,AFFECTED

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SPEECH, INABILITY TO UTTER SOUNDS,RAPID REDUCTION IN MOTORCONTROL,ALTEREDCONSCIOUSNESS,LOSS OF FEELING.NOTE!ARGON ASPHYXIATION MAY OCCURWITHOUTWARNING.Med Cond Aggravated By Exp: NOT REPORTEDEmergency/First Aid Proc: INHAL:REMOVE TO FRESH AIR GIVE OXYGEN ORARTIFICIAL RESPIRATION IF NEEDED. GET PROMPT QUALIFIED MEDICAL HELP.

Precautions for Safe Handling and Use=================--===================================--=====================--==========

Steps IfMatl Released/Spill: EVACUATE ALL PERSONNEL FROM AFFECTED AREA.USE AI>PROPRIATE PROTECTIVE EQUIP.IF LEAK IS IN CONTAINER VALVE,CONTACTYOUR CLOSEST SUPPLIER OR CALL 800-424-9300(CHEMTREC).Neutralizing Agent: NONE.Waste Disposal Method: DO NOT ATTEMPT TO DISPOSE OF WASTE OR UNUSEDQUANTITIES. RETURN IN THE SHIPPING CONTAINER PROPERLY LABELED, WITHVALVEOUTLET PLUGS OR CAPS SECURED AND VALVE PROTECTION CAP IN PLACE TOYOURSUPPLIER CALL SUPPLIER FOR EMERGENCY DISPOSAL ASSISTANCE.Precautions-Handling/Storing: USE/STORE IN COOL,DRY, WELL VENTILATED AREA.KEEP CYLINDERS UPRIGHT & SECURED. SEGREGATE FULL/EMPTY CYL. KEEPCYLINDERSAWAY FROM HEAT SOURCES.Other Precautions: COMPRESSED GAS CYLINDERS SHOULD NOT BE REFILLEDEXCEPTBY QUALIFIED PRODUCERS OFCOMPRESSED GASES. USE A CHECK VALVE ORTRAP IN THEDISCHARGE LINE TO PREVENT HAZARDOUS BACK FLOW INTO THE CYLINDER

Control Measures

Respiratory Protection: POSITIVE PRESSURE AIR LINE WITH MASK OR SELF-CONTAINED BREATHING APPARATUS SHOULD BE AVAILABLE FOR EMERGENCYUSE.Ventilation: MAINTAIN OXYGEN ABOVE 18 MOL PERCENT.Protective Gloves: NOT NESCESSARY.Eye Protection: SAFETY GOGGLES OR GLASSESOther Protective Equipment: SAFETY SHOESWork Hygienic Practices: NO SPECIAL REQUIREMENTS.Supp!. Safety & Health Data: HMIS SPOKE TO NORMAN BROWN,AT NATIONALWELDERS,ON 5112/93.HE TOLD US THAT THE PERCENTAGE OF ARGON IS 99.995.ITWASNOT SPECIFIED ON THE MSDS.

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Transportation Data

Trans Data Review Date: 93133DOT PSN Code: BHZDOT Proper Shipping Name: ARGON, COMPRESSEDDOT Class: 2.2DOT illNumber: UNI006DOT Label: NONFLAMMABLE GASDOT /DoD Exemption Number: NKIMO PSN Code: BNBIMO Proper Shipping Name: ARGON, COMPRESSEDIMO Regulations Page Number: 2105IMO UN Number: 1006IMO UN Class: 2(2.2)IMO Subsidiary Risk Label: -lATA PSN Code: cnlATA UN ID Number: 1006lATA Proper Shipping Name: ARGON, COMPRESSEDlATA UN Class: 2.2lATA Label: NON-FLAMMABLE GASAFI PSN Code: cnAFI Prop. Shipping Name: ARGON, COMPRESSEDAFI Class: 2.2AFI ID Number: UNI006AFI Basic Pac Ref: 6-6,6-10MMAC Code: NKAdditional Trans Data: MANUFACTURER SPECIFIES UNI006,NON-FLAMMABLE GASDOTCLASS.

Label Data==========================================--==----

Label Required: YESTechnical Review Date: 13MAY93MFR Label Number: UNKNOWNLabel Status: FCommon Name: ARGONChronic Hazard: NOSignal Word: CAUTION!Acute Health Hazard-Slight: XContact Hazard-None: XFire Hazard-None: XReactivity Hazard-None: XSpecial Hazard Precautions: ARGON ACTS AS AN ASPHYXIANT;IT DISPLACES

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OXYGEN. OXYGEN LEVELS SHOULD NOT FALL BELOW 18 MOL PERCENT.USE/STORE INCOOL,DRY,WELL VENTILATED AREA.KEEP CYLINDERS UPRIGHT &SECURED. SEGREGATEREMOVE TO FRESH AIR.GIVE OXYGEN OR ARTIFICIAL RESPIRATION IFNEEDED. GETPROMPT QUALIFIED MEDICAL HELP.Label Name: NATIONAL WELDERS SUPPLY CO INCLabel Street: 810 GESCOLabel P.O. Box: 31007Label City: CHARLOTTELabel State: NCLabel Zip Code: 28231Label Country: US

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Mat e ria IARGON

S a f e t y D a t a She e t Page: 2Rev. Date08/08/89

SECTION '3 - PHYSICAL DATA Continued •••

OdorOdorless

SECTION '4 - FIRE FIGHTING , EXPLOSION DATAFlash Point: NoneLower Explosive Limit (%): N/AUpper Explosive Limit (%): N/AFire and Explosion HazardsNone.Extinguishing MediaNonflammable, inert gas - Use any extinguishing media which is suitable forthe surrounding fire.Special Fire Fighting InstructionsNone.e------- _I SECTION '5 - EXPOSURE and EFFECTS - INHALATIONRoutes of Exposure - InhalationArgon is a simple asphyxiant. Maintain oxygen levels above 19.5% at sealevel. Effects of overexposure to high concentrations so as to displace theoxygen in the air necessary for life may include any, all or none of thefoll0!'ling:o Tingling of the tongue, fingertips or toes;o Weakened speech leading to the inability to utter sounds;o Rapid reduction in the ability to perform movements;o Loss of tactile sensations;o Heightened mental activity;The above symptoms may~or may not be present since there are no definitesymptoms of exposure. Argon is nontoxic but the liberation of a large amountin a confined area could displace the amount of oxygen in air necessary tosupport life.

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ARGONS a f e t y Oat a She e t Page: 3

Rev. Date I08/08/89

SECTION '5 - EXPOSURE and EFFECTS - INHALATION Continued •••First Aid - InhalationPROMPT MEDICAL ATTENTION IS MANDATORY IN ALL CASES OF OVEREXPOSURE. RESCUEPERSONNEL SHOULD BE EQUIPPED WITH SELF-CONTAINED BREATHING APPARATUS.Conscious persons should be assisted to an uncontaminated area and inhalefresh air. Quick removal from the contaminated area is most important.Unconscious persons should be moved to an uncontaminated area, givenartificial resuscitation and supplemental oxygen. Furt,er treatment shouldbe symptomatic and supportive.

I SECTION '5 - EXPOSURE and EFFECTS - SKINRoutes of Exposure - SkinFrostbite effects appear as a change in the color of the skin to gray orwhite possibly followed by blister1ng and may OCcur upon contact with liquid.First Aid - SkinFor dermal contact or frostbite: Remove contaminated clothing and flushaffected areas with lukewarm water. DO NOT USE HOT WATER. A physician shouldsee the patient promptly if the cryogenic "burn" has resulted in blisteringof the dermal surface or deep tissue freezing.

I SECTION '5 - EXPOSURE and EFFECTS - EYESRoutes of Exposure - EyesContact with liquid may cause tissue freezing.First Aid - EyesIMMEDiATELY FLUSH with te~id water in large quantities, or with sterilesaline solution. Seek med1cal attention. DO NOT USE HOT WATER.

I SECTION '5 - EXPOSURE and EFFECTS - INGESTIONRoutes of Exposure - IngestionSince ~roduct is a gas at room temperature, ingestion is unlikely. Contactwith l1quid product may cause freezing of tissue and should be treated asfrostbite. Consult a physician for treatment.

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Mat e ria IARGON

S a f e t y D a t a She e t Page: 4Rev. Date08/08/89

SECTION '5 - MISCELLANEOUS TOXICOLOGICAL INFORMATIONcarcinogenicity: NTP: No IARC: No OSHA: No

I SECTION '6 - REACTIVITY , POLYMERIZATIONStability: StableConditions to Avoid (Stability)Product is an inert gas.Hazardous Polymerization: will Not Occur

SECTION '7 - SPILL, LEAK, , DISPOSAL PROCEDURESSteps to be Taken in The Event of Spills, Leaks, or ReleaseEvacuate all personnel from affected areas. Use appropriate protectiveequipment. If leak is in user's equipment, be certain to purge piping withan inert gas prior to attempting repairs. If leak is in container orcontainer valve, contact CHEMTREC for emergency assistance or call yourclosest Airco location.

ttlasteODisposal MethodsDo not attempt to dispose of waste or unused quantities. Return in theshipping container PROPERLY LABELED, WITH ANY VALVE OUTLET PLUGS OR CAPSSECURED AND VALVE PROTECTION CAP IN PLACE to Airco for proper disposal.

SARA Hazard Classes: Sudden Release of Pressure Hazard

SECTION '8 - SPECIAL PROTECTIVE MEASURESVentilationUse local exhaust ventilation to reduce concentrations to within currentexposure limits. A laporatory type hood is suitable for handling small orlimited quantities. Maintain oxygen levels above °19.5% at normal pressure.Eye ProtectionSafety goggles or glasses.

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Mat e ria 1- S a f e t yARGON

D a t a She e t Page: SRev. Date08/08/89

SECTION '8 - SPECIAL PROTECTIVE MEASURES Continued •••Skin Protection

Protective gloves made of any suitable materiaL Use insulated gloves ifcontact with liquid product may occur.Respiratory Protection

An airline respirator with full face piece equipped with an escape bottle ora Self Contained Breathing Apparatus should be availabl~ for emergency use.Operate this equipment in the positive pressure demand l1t0de,PPD!Other Protection

Safety shoes, eyewash, safety shower.

SECTION '9 - SPECIAL PRECAUTIONS - STORAGE , HANDLINGStorage & Handling Conditions

Use only in well-ventilated areas. Valve protection caps must remain inplace unless container is secured with valve protection outlet piped to usepoint. Do not drag, slide or roll cylinders. Use a suitable hand truck forcylinder movement. Use a pressure reducing regulator when connectingcylinder to lower pressure «3000 psig) piping or systems. Do not heatcylinder by any means to increase the discharge rate of product from thecylinder. Use a check valve or trap in the discharge line to preventhazardous back ~low into the cylinder. Protect cylinders from ph¥sicaldamage. Store in cool, dry, well-ventilated area of non-combust1bleconstruction away from heavily trafficked areas and emergency exits. Donot allow the temperature where cylinders are stored to exceed 12soF.Cylinders should be stored u~right and firmly secured to prevent falling orbeing knocked over. Use a "f1rst in-first out" inventory system to preventfull cylinders being stored for excessive periods of time.Never'carrya compressed gas cylinder or a container of a gas in cryogenicliquid form in an enclosed space such as a car trunk, van or station wagon. Aleak can result in a fire, explosion, asphyxiation or a toxic exposure.

I SECTION '10 - SHIPPING INFORMATIONProper Shipping Name: Argon or Argon, CompressedHazard Class: Nonflammable GasDOT Identification Number: UN1006DOT Shipping Label: Nonflammable Gas

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SECTION '11 - MISC COMMENTS , REFERENCE DOCUMENTATION

Mat e ria l. S a f e t yARGON

Oat a She e t Page: 6Rev. Date08/08/89

Argon is non-corrosive and may be used with any common structural material.Compressed gas cylinders should not be refilled except by qualified producersof com~ressed gases. Shipments of a compressed gas cylinder, which has notbeen f1lled by the owner or with his (written) consent, is a violation ofFederal Law (49CFR). For additional recommendations, consult Compressed GasAssociation Pamphlets P-l, P-14, P-9, and Safety Bulletin SB-2.

I DISCLAIMER OF EXPRESSED AND IMPLIED WARRANTIES ~Although reasonable care has been taken in the ~reparation of this document,we extend no warranties and make no representat10ns as to the accuracy orcompleteness of the information contained therein, and assume noresponsibility regarding the suitability of this information for the user'sintended purposes or for the consequences of its use. Each individual shouldmake a determination as to the suitability of the information for theirparticular purpose(s).