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The image of a car sprayed with water. Chemicals found: iron still breaks down! Professor Aod Assoc. Dr. Wirachai Puttawong revealed that if you touch the skin, don’t think. Request to compromise dignity
From the case of adjunct professor Dr. Weerachai Putthawong or Ajarn Aod Professor of the Department of Chemistry Faculty of Arts and Sciences Kasetsart University Tear gas mixed with water collected from the front of Parliament was used to analyze the substances contained in the water. It seemed to have found 5 important substances
The collected water is bluish blue. Because it was contaminated with the color that the protesters used blue Therefore mixed with purple water But the DCM was extracted until the violet solution along with the substances it contained separated as shown in Figure 1-3.
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When removing the violet solution, the gc-ms technique (Gas Chromatography – Mass Spectrometry (GC-MS)) found that the purple color was Methylviolet 2b (Methylviolet Tubes), a normal purple color. Harmless And I found 5 important substances in the purple solution which are
(1) Dimethylsulfoxide, DMSO (dimethylsulfoxide) is an organic sulfide compound. It is a colorless liquid with high boiling temperature and is commonly used as a solvent and cleaning agent for electronic components. May cause irritation if administered in large quantities.
(2) 2-chlorobenzaldehyde (2-chlorobenzaldehyde) colorless or slightly yellowish clear liquid Caution should be taken with severe burns and eye damage caused by 2-chlorobenzaldehyde. Used as a production precursor o-chlorobenzylidene malononitrile or 2-chlorobenzalmalononitrile or ochlorobenzylmalononitrile What is an active ingredient in CS gas?
Which, when exposed to tear gas, will cause irritation to the conjunctiva and the iris. Causing many tears to flow The conjunctiva is red and the cornea is swollen, mucus is not visible, drooling, coughing, shortness of breath. When the body is exposed to tear gas, symptoms usually develop within seconds or minutes. Symptoms last 15 to 30 minutes, and most resolve within an hour.
(3) 2-Chlorobenzyl Alcohol (2-Chlorobenzyl Alcohol) is a white powder. This substance can cause irritation to the eyes, skin and even inhalation.
(4) 2-chlorobenzalmalononitrile (2-chlorobenzalmalononitrile) or o-chlorobenzylmalononitrile (CS gas) 2-chlorobenzalmalononitrile or o-chlorobenzylmalononitrile The Army for short, CS is classified as a chemical weapon used for crowd control. But non-lethal (non-lethal chemical weapons) normally at room temperature. Not in a gaseous state, but is capable of aerosol as pepper spray
(5) o-chlorobenzylmalononitrile It is an irritant as in CS gas, a derivative of substance number (4).
Associate Professor Dr. Weerachai further stated that Substance # 1 was a solvent. To homogenize the other 4 solvents in a leavening agent As for substance number 2, 3, 4, 5, it is a group of tear gas, which is enough to put in a body, but put all 4.
Related academic work There is no scientific data to confirm exactly which tear gas (CS) concentrations of 1% versus 5% are more dangerous. Because most of the damage comes from the shooting range.
Effect on Humans: The effects of CS smoke or aerosol and inhalation exposure were studied. Aerosol was found when produced by the 0.5um thermal dispersion method in methylene chloride solvent. Study with volunteers for 90 min on site. At the dose of 0.5-1 mg / m3, the subjects had burns around the mouth. Breathing and burning, including tightness in the chest
Later, Adjunct Professor Dr. Weirachai posted on Facebook that “I recently saw a juvenile wound with violet water separating four of the five chemicals that were tested. 4 different reels, the standard is not lethal (non lethal weapon), but it is too dark and carries too much sir. Consider the Chemical Weapons Convention, which is also the most important international principle. “
The latest adjunct professor Dr. Weerachai posted more on Facebook. With a picture of water spraying on the weather side What chemicals does your car carry? Why is it wearing down and leaking like this? You need to be careful. The size of the steel is also corroded and leaking. Found this touch of human skin No need to imagine #Please compromise dignity #Care and compassionate. “
Thanks for coming to Weerachai Phutdhawong.
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