PRODUCT NAME: HYDROGEN, REFRIGERATED LIQUID

CHEMICAL NAME: Hydrogen

COMMON NAMES/SYNONYMS: LH2, Para Hydrogen

TDG Classification: 2.1

WHMIS Classification: A, B1

Prepared by: Loss Control (908)464-8100/(905)273-7700

PREPARATION DATE: 03/31/99

REVIEW DATES: 03/31/99

LATEST Revision Date: 03/31/99

PREVIOUS REVISION DATE: None

Simple Asphyxiant - This product does not contain oxygen and may cause asphyxia if released in a confined area. Maintain oxygen levels above 19.5%. Contact with product may cause frostbite or freeze burns in exposed tissues. Flammable.

Carcinogenicity: -- NTP: No IARC: No OSHA: No

Contact with evaporating liquid may cause frostbite or cryogenic "burns". Irritation may also occur.

Contact with liquefied product may cause frostbite or cryogenic "burns" upon evaporation. Frostbite effects are a change in color of the skin to gray or white, possibly followed by blistering. Skin may become inflamed and painful.

Ingestion is unlikely. Contact with evaporating liquid may cause frostbite or cryogenic "burns".

Product is a non-toxic simple asphyxiant. High concentrations may exclude an adequate supply of oxygen to the lungs.

Effects of oxygen deficiency resulting from simple asphyxiants may include: rapid breathing, diminished mental alertness, impaired muscular coordination, faulty judgement, depression of all sensations, emotional instability, and fatigue. As asphyxiation progresses, nausea, vomiting, prostration, and loss of consciousness may result, eventually leading to convulsions, coma, and death.

Oxygen deficiency during pregnancy has produced developmental abnormalities in humans and experimental animals.

Never introduce oil or ointment into the eyes without medical advice! In case of freezing or cryogenic "burns" by rapidly evaporating liquid. DO NOT WASH THE EYES WITH HOT OR EVEN TEPID WATER! Remove victim from the source of contamination. Open eyelids wide to allow liquid to evaporate. If pain is present, refer the victim to an ophthalmologist for further treatment and follow up. If the victim cannot tolerate light, protect eyes with a light bandage or handkerchief.

Flush area with tepid water. A physician should see the patient promptly if the cryogenic "burn" has resulted in blistering of the skin or deep tissue freezing or if frostbite has occurred. Treat the "burn" in a similar manner as a thermal burn.

A physician should see the patient promptly if the cryogenic "burn" has resulted in blistering of the skin or deep tissue freezing or if frostbite has occurred.

PROMPT MEDICAL ATTENTION IS MANDATORY IN ALL CASES OF OVEREXPOSURE. RESCUE PERSONNEL SHOULD BE EQUIPPED WITH SELF-CONTAINED BREATHING APPARATUS. Victims should be assisted to an uncontaminated area and inhale fresh air. Quick removal from the contaminated area is most important. Unconscious persons should be moved to an uncontaminated area, and if breathing has stopped, administer artificial resuscitation and supplemental oxygen. Further treatment should be symptomatic and supportive.

Extremely flammable gas. Hydrogen is very light and may collect in the upper portions of storage areas. Hydrogen burns with an almost invisible flame.

Liquid hydrogen when spilled will freeze the ground, from an insulating layer and thus slow the boil off. The cold, dense gas is heavier than air and may flow along the ground until warm enough to rise.

Water, Dry chemical, Carbon dioxide.

Stop the flow of gas if possible. Inject an inert gas into the system if possible to prevent flashback. Do not extinguish the fire in liquid systems until the hydrogen flow is cut off or an explosive re-ingnition may occur. Use water spray to cool surrounding containers. A water fog may be used to create ventilation. Ventilation fans must be explosion proof.

Be cautious of a Boiling Liquid Expanding Vapor Explosion (BLEVE) if flame is impinging on liquid hydrogen containers. Direct water stream onto containers above the liquid level using remote monitors.

Evacuate all personnel from affected area. Use appropriate protective equipment. If leak is in user's equipment, be certain to purge piping with inert gas prior to attempting repairs. If leak is in container or container valve, contact the appropriate emergency telephone number listed in Section 1 or call your closest BOC location.

Class 1, Group B

Earth-ground and bond all lines and equipment associated with the hydrogen system. Electrical equipment should be non sparking and explosion proof.

Hydrogen is noncorrosive. However, hydrogen can interact with some metals (hardened steels) to cause embrittlement.

Use only in well-ventilated areas. Stationary customer site vessels should be operated in accordance with the manufacturer's and BOC's instructions. Do not attempt to repair, adjust or in any other way modify the operation of these vessels. If there is a malfunction or other type of operations problem with the vessel, contact the closest BOC location immediately for assistance. DO NOT allow smoking or open flames in or near any area where liquid hydrogen is handled or used.

Liquid hydrogen is delivered into stationary vacuum jacketed vessels at the customer's location. Consult manufacturer's instructions. NEVER HANDLE LIQUID HYDROGEN IN OPEN VESSELS. NEVER ALLOW LIQUID HYDROGEN TO BOIL IN A SEALED CONTAINER. The excessive pressures could result in vessel rupture.

For additional storage recommendations, consult Compressed Gas Association's Pamphlets G-5, P-12 and OSHA 1910-Subpart H. NFPA 50A covers gaseous hydrogen at consumer sites. NFPA 50B covers liquefied hydrogen at consumer sites.

Liquid hydrogen has a density of 4.43 lb/cubic foot (70.96 kg/m3); vessels and associated structures are not designed to support higher density fluids. Liquid hydrogen should not be stored or used in uninsulated vessels.

Never carry a compressed gas cylinder or a container of a gas in cryogenic liquid form in an enclosed space such as a car trunk, van or station wagon. A leak can result in a fire, explosion, asphyxiation or a toxic exposure.

Refer to individual state or provincial regulations, as applicable, for limits which may be more stringent than those listed here.

Local exhaust to prevent accumulation of high concentrations so as to reduce the oxygen level in the air to less than 19.5% and to keep gas mixture below lower explosive limit (4 %).

Safety goggles or glasses as appropriate for the job.

Protective gloves of material appropriate for the job.

Positive pressure air line with full-face mask and escape bottle or self-contained breathing apparatus should be available for emergency use.

Safety shoes or other footwear as appropriate for the job.

Stable.

Oxidizers. Fluorine and hydrogen react at -418 ^oF (-250 ^oC) when impurities are present. Chlorine/hydrogen mixtures explode if exposed to light. Lithium metal will burn in hydrogen atmosphere.

Does not occur.

Oxygen deficiency during pregnancy has produced developmental abnormalities in humans and experimental animals.

No data given in the Registry of Toxic Effects of Chemical Substances (RTECS) or Sax, Dangerous Properties of Industrial Materials, 7th ed.

No data given.

Do not attempt to dispose of residual waste or unused quantities. Return in the shipping container PROPERLY LABELED, WITH ANY VALVE OUTLET PLUGS OR CAPS SECURED AND VALVE PROTECTION CAP IN PLACE to BOC Gases or authorized distributor for proper disposal.

Acute Health Hazard

Fire Hazard

Sudden Release of Pressure Hazard

Compressed gas cylinders shall not be refilled without the express written permission of the owner. Shipment of a compressed gas cylinder which has not been filled by the owner or with his/her (written) consent is a violation of transportation regulations.

Although reasonable care has been taken in the preparation of this document, we extend no warranties and make no representations as to the accuracy or completeness of the information contained herein, and assume no responsibility regarding the suitability of this information for the user's intended purposes or for the consequences of its use. Each individual should make a determination as to the suitability of the information for their particular purpose(s).