| Identification | More | 【Name】
Hydrogen | 【CAS】
1333-74-0 | 【EINECS(EC#)】
215-605-7 | 【Molecular Formula】
H2 | 【MDL Number】
MFCD00070838 | 【Molecular Weight】
2.02 | 【MOL File】
1333-74-0.mol |
| Chemical Properties | Back Directory | 【Appearance】
colourless gas | 【mp 】
−259.2 °C(lit.)
| 【bp 】
−252.8 °C(lit.)
| 【density 】
0.0899 | 【vapor density 】
0.07 (21 °C, vs air)
| 【Stability:】
Stable. Highly flammable. Readily forms explosive mixtures with air. Upper (U.K.) composition limit for use of a nitrogen/hydrogen mixture in the open lab is 5.7% hydrogen. | 【Water Solubility 】
0.00017 g/100 mL | 【Merck 】
13,4813 | 【CAS DataBase Reference】
1333-74-0(CAS DataBase Reference) | 【NIST Chemistry Reference】
Hydrogen(1333-74-0) | 【EPA Substance Registry System】
1333-74-0(EPA Substance) |
| Safety Data | Back Directory | 【Hazard Codes 】
F+ | 【Risk Statements 】
R12:Extremely Flammable. | 【Safety Statements 】
S9:Keep container in a well-ventilated place .
S16:Keep away from sources of ignition - No smoking .
S33:Take precautionary measures against static discharges . | 【RIDADR 】
UN 1950 2.1
| 【WGK Germany 】
-
| 【RTECS 】
MW8900000
| 【F 】
4.5-31 | 【HazardClass 】
2.1 | 【Hazardous Substances Data】
1333-74-0(Hazardous Substances Data) |
| Hazard Information | Back Directory | 【General Description】
HYDROGEN(1333-74-0) is a colorless, odorless gas. HYDROGEN(1333-74-0) is easily ignited. Once ignited HYDROGEN(1333-74-0) burns with a pale blue, almost invisible flame. The vapors are lighter than air. HYDROGEN(1333-74-0) is flammable over a wide range of vapor/air concentrations. HYDROGEN(1333-74-0) is not toxic but is a simple asphyxiate by the displacement of oxygen in the air. Under prolonged exposure to fire or intense heat the containers may rupture violently and rocket. HYDROGEN(1333-74-0) is used to make other chemicals and in oxyHYDROGEN(1333-74-0) welding and cutting. | 【Reactivity Profile】
Finely divided platinum and some other metals will cause a mixture of hydrogen and oxygen to explode at ordinary temperatures. If a jet of hydrogen in air impinges on platinum black the metal surface gets hot enough to ignite the gases, [Mellor 1:325(1946-1947)]. Explosive reactions occur upon ignition of mixtures of nitrogen trifluoride with good reducing agents such as ammonia, hydrogen, hydrogen sulfide or methane. Mixtures of hydrogen, carbon monoxide, or methane and oxygen difluoride are exploded when a spark is discharged, [Mellor 2, Supp. 1:192(1956)]. An explosion occurred upon heating 1'-pentol and 1''-pentol under hydrogen pressure. HYDROGEN appears that this acetylenic compound under certain conditions suddenly breaks down to form elemental carbon, hydrogen, and carbon monoxide with the release of sufficient energy to develop pressures in excess of 1000 atmospheres, [AIChE Loss Prevention, p1, (1967)]. | 【Air & Water Reactions】
Highly flammable. | 【Health Hazard】
Vapors may cause dizziness or asphyxiation without warning. Some may be irritating if inhaled at high concentrations. Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite. Fire may produce irritating and/or toxic gases. | 【Fire Hazard】
EXTREMELY FLAMMABLE. Will be easily ignited by heat, sparks or flames. Will form explosive mixtures with air. Vapors from liquefied gas are initially heavier than air and spread along ground. CAUTION: Hydrogen (UN1049), Deuterium (UN1957), Hydrogen, refrigerated liquid (UN1966) and Methane (UN1971) are lighter than air and will rise. Hydrogen and Deuterium fires are difficult to detect since they burn with an invisible flame. Use an alternate method of detection (thermal camera, broom handle, etc.) Vapors may travel to source of ignition and flash back. Cylinders exposed to fire may vent and release flammable gas through pressure relief devices. Containers may explode when heated. Ruptured cylinders may rocket. |
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| Company Name: | Shanghai Hanhong Chemical Co., Ltd.
|
| Telephone: | 021-61521197,021-60496702,021-54302127,021-54306202,021-61525701,021-54308259 |
| Contact Fax: | +86-21-54291107 |
| Website: | www.hanhonggroup.com |
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