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helium

GB No. CAS US> No. 7440-59 -7
Molecular Formula He
molecular 4.00

odorless and colorless inert gas; Vapor Pressure 202. 64kPa (-268.9 ° C); melting point -272.1 ° C; boiling point -268.9 solubility : not soluble in water, ethanol; density : relative density (water = 1) 0.15 (-271 ° C); the relative density (Air = 1) 0.14; Stability : stability; risk Marker 5 (Unburning gases); the main purposes : for balloons, thermometer, tube, diving suits and other inflatables


2. The impact on the environment :
a health hazard


pathways : inhalation.
health hazards : Cymbalta inert gases, high concentrations can reduce the partial pressure of oxygen and are a choking hazard. When air helium concentration increased, the patient comes first accelerated respiration, distractibility, ataxia; There followed unable to fatigue, irritability, nausea, vomiting, coma, convulsions and even die.


two, toxicology information and environmental behavior


hazardous characteristics : In case of high fever, increased pressure within containers, cracking and the risk of explosion.


3. Emergency Monitoring Methods :

4. laboratory monitoring methods : gas chromatography
reference to the "Handbook of Analytical Chemistry" (fourth volumes, chromatography analysis), the chemical industry publishers


5. Environmental standards :
American plant health standards asphyxiating gas


6. Emergency treatment and disposal methods :
a leakage contingency


rapid withdrawal of staff to leak contaminated areas upwind, isolation and strict restrictions on access. Recommended emergency personnel wearing respirators-positive pressure self-sufficiency, wearing overalls general operations. As far as possible, cut off the source of leakage. A reasonable ventilation, accelerated proliferation. If possible, use immediately. Leak containers should be properly handled, repair, testing later use.


two protective measures


respiratory protection : general need special protection. When air operations oxygen concentrations below 18%, the air must wear respirators, oxygen respirator mask or long pipe.
eye protection : general need special protection.
physical protection : general operating wear uniforms.
hand protection : Wear protective gloves general operations.
other : avoid high concentrations of respirable. Enter cans, or other restrictive space of high concentration operations, someone custody.


three, and emergency measures


Inhalation : rapidly to the scene from the air fresh air. To keep the airway patency. If breathing is difficult, give oxygen. Stop breathing, artificial resuscitation immediately. Medical treatment.


fire fighting methods : This Unburning. Cut off the gas source. Cooling water containers, if possible to move containers from the scene empty Department.


Notice:Each item can have many explanations from different angels. If you want grasp the item comprehensively,please see below "more details data".
Structure:
Please see below "More Detailed Data"
More Detailed Data:
1) helium
2) helium
3) Helium;Helium, high purity;atomic helium;helium gas;helium, compressed;helium-4;o-helium;p-helium;helium,high purity;helium,refrigerated liquid(cryogenic liquid)
4) helium
5) helium
6) pure helium
7) high purity helium
8) helium burn
9) epithelium
10) endothelium
Notice Some description was translated by software and the data is only as a reference.
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