Supplier Product Identification Physical and Chemical Properties First Aid Measures Handling and Storage Hazards Identification Exposure Controls/Personal Protection Fire Fighting Measures Accidental Release Measures Stability and Reactivity Transport Information
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Hydrogen(1333-74-0)

Supplier Product Identification Physical and Chemical Properties First Aid Measures Handling and Storage Hazards Identification Exposure Controls/Personal Protection Fire Fighting Measures Accidental Release Measures Stability and Reactivity Transport Information

Product Identification

Product Name
Hydrogen
CAS
1333-74-0
Formula
H2
Molecular Weight
2.02
EINECS
215-605-7
RTECS
MW8900000
RTECS Class
Other
Merck
12,4833
Beilstein/Gmelin
2 (G)
EC Index Number
001-001-00-9
EC Class
Extremely flammable

Physical and Chemical Properties

Appearance
A colorless, odorless cryogenic liquid.
Solubility in water
0.17 mg/100 mL
Melting Point
-258.9
Boiling Point
-252.8
Density
0.071 g/cm3 (liquid, 20 C)
pKa/pKb
35(at 25℃) (pKa)
Heat Of Vaporization
0.98 kj/mol
Usage
Oxyhydrogen flame is used in processing of quartz, in production of several metals which resist fusion, such as molybdenum, bismuth.
Vapor Density
.07
Refractive Index
1.98

First Aid Measures

Ingestion
Seek medical assistance.
Inhalation
If victim is unconscious (due to oxygen deficiency), move him to fresh air and apply resuscitation methods; call physician.
Skin
Rewarming and a variety of topical treatments are indicated for frostbite injury. See main section for more information.
Eyes
Treat for frostbite.

Handling and Storage

Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
Containers of this material may be hazardous when emptied. Since emptied containers retain product residues (vapor, liquid, and/or solid), all hazard precautions given in the data sheet must be observed.

Hazards Identification

Inhalation
Asphyxiant, headache, drowsiness, dizziness, excitation, salibation, vomiting, unconscious and death.
Skin
Dermal exposure may cause frostbite injury. Severe tissue burns have been reported.
Eyes
Decreases in night vision, visual acuity, and visual fields (tunnel vision) may occur. Frothy mucous may be seen.
Ingestion
Frostbite of the lips and mouth may result from contact with the liquid.
Hazards
Burns with an almost invisible flame.
UN (DOT)
1049

Exposure Controls/Personal Protection

Personal Protection
Wear appropriate protective gloves, clothing and goggles. Always wear thermal protective clothing when handling refrigerated/cryogenic liquids.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Exposure Effects
Rapid breathing and rapid heart rate are common. In severe cases abnormally low blood pressure, apnea, and cardiac arrest develop. Various disturbances including headache, dizziness, mood disturbances, numbness of the extremities, sleepiness, mental confusion, poor judgement and coordination, and memory loss may occur. Prolonged or severe hypoxia results in unconsciousness. Prolonged asphyxia may produce CNS injury. Hemiparesis has been reported with volatile substance abuse. Cerebral edema with brainstem herniation may occur. Seizures have been reported following intentional inhalation.
Poison Class
-

Fire Fighting Measures

Autoignition
500-571
Fire Fighting
Wear NIOSH/MSHA approved SCBA, flame and chemical resistant clothing. If it can be done without rist, remove material from fire area. Do not extinguish fire unless flow can be stopped. Use water in flooding quantities as fog. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Do not use water on material itself.
Upper exp. limit
76
Lower exp. limit
4
Fire Potential
Extremely flammable gas.

Accidental Release Measures

Small spills/leaks
Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Attempt to stop leak if without undue personnel hazard. Use water spray to knock-down vapors. Do not use water on material itself.

Stability and Reactivity

Incompatibilities
Reacts violently with air, oxygen, chlorine, fluorine, strong oxidizers causing fire and explosion hazard. Metal catalysts, such as platinum and nickel, greatly enhance these reactions.
Stability
Stable.
Decomposition
None.

Transport Information

UN Number
1049
Hazard Class
2.1
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