Linde Gas LLC (216) 642-6600P.O. Box 94737Cleveland, Ohio 44101www.us.lindegas.com

MATERIALSAFETYDATA SHEET

No. 050

AGA GAS, INC. (216) 642-66006055 ROCKSIDE WOODS BLVDP.O. BOX 94737CLEVELAND, OH 44101-4737

Information contained in this material safety data sheet is offered without charge for use by technically qualified personnel at their discretion andrisk. All statements, technical information and recommendations contained herein are based on tests and data which we believe to be reliable, butthe accuracy or completeness thereof is not guaranteed and no warranty of any kind is made with respect thereto. This information is not intendedas a license to operate under or a recommendation to practice or infringe any patent of this Company or others covering any process, compositionof matter or use.Since the Company shall have no control of the use of the product described herein, the Company assumes no liability for loss or damage incurredfrom the proper or improper use of such product.

HEALTH HAZARD DATA

PRODUCT NAME

TRADE NAME AND SYNONYMS

CHEMICAL NAME AND SYNONYMS

ISSUE DATES AND REVISIONS

CAS #

DOT I.D. No.:

DOT Hazard Class:

Formula

Chemical Family:

TIME WEIGHTED AVERAGE EXPOSURE LIMIT

SYMPTOMS OF EXPOSURE

TOXICOLOGICAL PROPERTIES

RECOMMENDED FIRST AID TREATMENT

Nitrogen Dioxide; Nitrogen Tetroxide; Nitrogen Peroxide

Dinitrogen tetroxide (D.O.T.)

Nitrogen Peroxide; Nitrogen Dioxide

Revised May 1998

NO2 = 10102-44-0N2O4 = 10544-72-6

UN 1067; RQ 10(4.54)

Division 2.3

N02; N2O4

Oxide of Nitrogen

3 Molar PPM; STEL = 5 Molar PPM (ACGIH 1997). OSHA 1995 Ceilinq limit = 5 Molar PPM.

Vapors are a strong irritant to the pulmonary tract. Contact with liquid causes a severe corrosive action on the skin oreyes. Initial symptoms of inhalation may be moderate and include irritation of the eyes and throat, tightness of thechest, headache, nausea and gradual loss of strength. Severe symptoms may be delayed (possibly for 5 to 7 hours)and include cyanosis, increased difficulty in breathing, irregular respiration, lassitude and possible eventual death dueto pulmonary edema in untreated cases.

The vapor is highly toxic and hazardous because of its ability to cause delayed chemical pneumonitis and pulmonaryedema. Chronic or repeated exposure may cause permanent decrements in pulmonary function (silo fillers disease).The absence of marked acute irritation of nitrogen dioxide limits its warning properties. Contact with the liquid causes acorrosive or chemical etching action on the skin or eyes.

Neither nitrogen dioxide or nitrogen tetroxide are listed in the IARC, NTP or by OSHA as a carcinogen or potentialcarcinogen

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PROMPT MEDICAL ATTENTION IS MANDATORY IN ALL CASES OF OVEREXPOSURE TO NITROGEN DIOXIDE.RESCUE PERSONNEL SHOULD BE EQUIPPED WITH SELF-CONTAINED BREATHING APPARATUS AND WEARPROTECTIVE CLOTHING AND BOOTS IF THE LIQUID HAS SPILLED OR IS BEING DISCHARGED.Inhalation: Conscious persons should be carried (not assisted) to an uncontaminated area and breathe fresh airsupplemented with oxygen. Keep the patient warm, quiet and under competent medical observation until the danger ofdelayed pulmonary edema has passed (at least 72 hours). Any physical exertion during this period should bediscouraged as it may increase the severity of the pulmonary edema or chemical pneumonitis. Bed rest is indicated.Unconscious persons should be moved to an uncontaminated area,

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Linde Gas LLCP.O. Box 94737Cleveland, Ohio 44101www.us.lindegas.com

FIRE AND EXPLOSION HAZARD DATA

HAZARDOUS MIXTURES OF OTHER LIQUIDS, SOLIDS, OR GASES

REACTIVITY DATA

SPILL OR LEAK PROCEDURES

PHYSICAL DATABOILING POINT

VAPOR PRESSURE

SOLUBILITY IN WATER

EVAPORATION RATE

APPEARANCE AND ODOR

LIQUID DENSITY AT BOILING POINT

GAS DENSITY AT 700F. 1 atm

FREEZING POINT

SPECIFIC GRAVITY (AIR=1)

FLASH POINT (Method used)

EXTINGUISHING MEDIA

SPECIAL FIRE FIGHTING PROCEDURES

UNUSUAL FIRE AND EXPLOSION HAZARDS

AUTO IGNITION TEMPERATURE FLAMMABLE LIMITS % BY VOLUME (See Page 4)

ELECTRICAL CLASSIFICATION

STABILITY

INCOMPATIBILITY (Materials to avoid)

HAZARDOUS DECOMPOSITION PRODUCTS

HAZARDOUS POLYMERIZATION

CONDITIONS TO AVOID

CONDITIONS TO AVOID

STEPS TO BE TAKEN IN CASE MATERIAL IS RELEASED OR SPILLED

WASTE DISPOSAL METHOD

Nitrogen Dioxide; Nitrogen Tetroxide; Nitrogen

2

Nitrogen dioxide is extremely reactive and is a strong oxidizing agent. It explodes on contact with alcohols,hydrocarbons, organic materials and fuels. Nitrogen dioxide decomposes on contact with water to produce nitric andnitrous acids. It acts as a catalyst for the explosive reaction of oxyqen and hydrogen.

70F (21.1C)

@ 70F (21.1C) = 14.8 psia (102 kPa)Decomposes to nitric and nitrous acids

Unknown; should be 99.9+% volatileYellow-brown liquid to reddish-brown gas with an acid suffocating odor.

90.08 lb/ft3 (1,443 kg/m3)

.204 lb/ft3 (3.27 kg/m3)

11.84F (-11.20C)

@ 70F (21.1 C) = 2.83

N/A

Water spray or fog. Do not use halogenated materials.

Although nonflammable, nitrogen dioxide can support combustion. In case of fire, an attempt should be made to shut off the sourceof nitrogen dioxide.

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Nitrogen dioxide is a strong oxidizing agent and will support combustion.

N/A

Nonhazardous

N/A N/ALE UEL

Unstable

Stable X

May Occur

Will Not Occur

Temperatures above 320F (160C)

Hydrocarbons, fuels

Nitric and nitrous acids

NoneX

Evacuate all personnel from affected area. Use appropriate protective equipment. If leak is in users equipment, becertain to purge piping with an inert gas prior to attempting repairs. If leak is in container or container valve, contactyour closest supplier location or call the emergency telephone number listed herein.

Do not attempt to dispose of waste or unused quantities. Return in the shipping container properly labeled, with anyvalve outlet plugs or caps secured and valve protection cap in place to your supplier. For emergency disposalassistance, contact your closest supplier location or call the emergency telephone number listed herein.

SPECIAL PRECAUTIONS*

SPECIAL PROTECTION INFORMATION

*Various Government Agencies (i.e. Department of Transportation, Occupational Safety and Health Administration, Food and Drug Administrationand others) may have specific regulations concerning the transportation, handling, storage or use of this product which will not be reflected in thisdata sheet. The customer should review these regulations to ensure that he is in full compliance.

RESPIRATORY PROTECTION(Specify type)

VENTILATION

PROTECTIVE GLOVES

EYE PROTECTION

OTHER PROTECTIVE EQUIPMENT

LOCAL EXHAUST

MECHANICAL (Gen.)

SPECIAL LABELING INFORMATION

SPECIAL HANDLING RECOMMENDATIONS

SPECIAL STORAGE RECOMMENDATIONS

SPECIAL PACKAGING RECOMMENDATIONS

Nitroqen Dioxide

3

Positive pressure air line with mask or self-containedbreathing apparatus should be available for emergency use.

Hood with forced ventilationTo prevent accumulation above the TWA

N/A

SPECIAL

OTHER

N/A

N/A

Safety goggles or glasses plus face shield

Rubber or Teflon

Safety shoes, safety shower, eyewash fountain,

DOT Shipping Name: Dinitrogen tetroxideDOT Shipping Label(s): Toxic Gas; Oxidizer; Corrosive

DOT Hazard Class: Division 2.3I.D. No.: UN 1067RO 10(4.54)

Use only in well-ventilated areas. Valve protection caps and valve outlet threaded plugs must remain in place unlesscontainer is secured with valve outlet piped to use point. Do not drag, slide or roll cylinders. Use a suitable hand truckfor cylinder movement. Do not heat cylinder by any means to increase the discharge rate of product from the cylinder.Use a check valve or trap in the discharge line to prevent hazardou back flow into the cylinder.

For additional handling recommendations, consult Compressed Gas Associations Pamphlet P-1.

Protect cylinders from physical damage. Store in cool, dry, well-ventilated area away from heavily trafficked areas andemergency exits. Do not allow the temperature where cylinders are stored to exceed 125F (52C). Cylinders should bestored upright and firmly secured to prevent falling or being knocked over. Full and empty cylinders should besegregated. Use a first in - first out inventory system to prevent full cylinders being stored for excessive periods oftime.

For additional storage recommendations, consult Compressed Gas Associations Pamphlet P-1.

Anhydrous nitrogen dioxide is noncorrosive to most metals at normal temperatures. It does corrode copper and itsalloys. Teflon is the preferred gasket material.

OTHER RECOMMENDATIONS OR PRECAUTIONSKeep equipment scrupulously dry. Compressed gas cylinders should not be refilled except by qualified producers ofcompressed gases. Shipment of a compressed gas cylinder which has not been filled by the owner or with his (written)consent is a violation of Federal Law (49CFR).

(Continued on Page 4)

Nitrogen Dioxide

4

HEALTH HAZARD DATA

TOXICOLOGICAL PROPERTIES: (Continued)

Persons in ill health where such illness would be aggravated by exposure to nitrogen dioxide should not be allowed towork with or handle this product.

RECOMMENDED FIRST AID TREATMENT: (Continued)

given assisted respiration and supplemental oxygen. Once respiration has been restored, they should be treated asabove.

Eye Contact: PERSONS WITH POTENTIAL EXPOSURE TO NITROGEN DIOXIDE SHOULD NOT WEARCONTACT LENSES.

Flush contaminated eye(s) with copious quantities of water. Part eyelids to assure complete flushing. Continue for aminimum of 15 minutes.

Skin Contact: Flush affected area with copious quantities of water. Remove affected clothing as rapidly as possible.Subsequently treat as for a thermal burn.

FIRE AND EXPLOSION HAZARD DATA

SPECIAL FIRE FIGHTING PROCEDURES: (Continued)

Continued application of large quantities of water will eventually dilute the oxidizers so that combustion is no longersupported. The remaining airsupported fire may be extinguished by the appropriate method.

SPECIAL PRECAUTONS

OTHER RECOMMENDATIONS OR PRECAUTIONS: (Continued)

Always secure cylinders in an upright position before transporting them. NEVER transport cylinders in trunks of vehicles,enclosed vans, truck cabs or in passenger compartments. Transport cylinders secured in open flatbed or in open pick-uptype vehicles.

Reporting under SARA, Title IIr, Section 313 not required.

NFPA 704 NO. for nitrogen dioxide = 3 O O OX