Common appellation:(Synonyms): Hydrochloric acid, muriatic acid.
+ international appellation: Hydrochloric acid.
+ Molecular Formula: HCl (Relative molecular M=36.5)
b, Product quality:
|TYPE 31%||TYPE 35%|
|1||Appearance||Transparent liquid||Transparent liquid|
|2||Density at 25oC||1,155±0,005||1,161±0,005|
|3||hydrochloric acid Content||(30÷31) %||(35 ± 2) %|
|4||content of Iron (Fe+3 )||≤ 0,8 ppm||≤ 10 ppm|
|5||free chlorine Content||≤ 20 ppm||≤ 40 ppm|
HCl acid is widely used in many industries: food industry, tanning, textile industry, engineering, metallurgy, electroplating, synthesis of organic compounds...
- Pickling iron rust : Use the acid solution HCl to clean the iron surface before passing the next stage such as rolling, squeezing, galvanizing, painting... Usually using acid HCl 18%, the detergent reaction:
Fe2O3 + Fe + 6 HCl → 3FeCl2 + 3H2O
Iron rust is reacted with FeCl2 dissolved in solution.
FVDP Vietnamese-English Dictionary
Manufacture of inorganic compounds: the manufacture of PAC water treatment chemicals; The production of calcium chloride, nickel (II) chloride is used for electroplating and zinc chloride for plating industry and electrochemical battery manufacture.
Manufacture of organic Compounds: PVC synthesis, bisphenols A produces polycarbonates, activated carbon, ascorbic acid, as well as in some products of pharmaceutical industry:
Synthetic VCM (Vinyl Chloride Monomer), used to produce PVC:
CH2=CH2 + 2 HCl + 1⁄2 O2 → ClCH2CH2Cl + H2O
Synthesis of dichloroethane, used in interior technology, spray paint, wallpaper, home appliances, automotive parts...
2CH2=CH2 + 4HCl + O2 → 2ClCH2CH2Cl + 2H2O
Manufacture of activated Carbon:
Wood + HCl + Heat → Activated Carbon
Oil exploited: Acid HCl can be used to pump into the rocks of the oilfield to dissolve a portion of the stone (also known as the Well rinse) and create larger hollow holes.
Control and neutrfying pH: In industry requires purity (food, pharmaceutical, drinking water), Hydrochloric acid is used to regulate the pH of water to be disposed of. It also uses Hydrochloric acid to neutrte industrial wastewater, pool water...
Ion exchange Resin Regeneration: using HCl acid with a content of Fe3+ ≤ 0, 8 ppm to separate the adsorbed cation in resin particles: Na+ is replaced by H+, Ca2+ is replaced by 2H+ (if the content of iron in large acids will cause the activation of plastic particles).
Used in food processing: hydrolysis of proteins in meat, fish and plants to produce amino acids (amino acids that make the protein of fish sauce).
Applications in the textile industry: acid HCl used in the process of staining fabrics (requires the content of iron in acid less than 0.03%).
Some other uses: tanning, home cleaning, gelatin manufacture, food additives...
Respiration: gas HCl toxic to the respiratory system, which is strongly corrosive, when inhalation with a burning sensation of the lungs, shock, breathing, sore throat. Maximum permissible concentrations in the air: 0.25 ÷ 10 mg/m3 air.
Method of treatment: Bring the victim to the area with fresh air, artificial respiration if the victim stops breathing. Provide oxygen when the victim breathes difficulties (medical personnel performed).
Eye: Hydrochloric acid corrode the mucosa, causing sensations of pain, no visible, severe deep burns.
Treatment: It is necessary to rinse the eye with clean water immediately after contact for about 15 minutes then to the medical facility for treatment.
Skin: Acid HCl causing skin burns, itching sensation, burning.
Treatment: Take away clothes, protective items when the solution is sticky, wash your skin with plenty of clean water.
Digestive system: when ingestion of the shocking HCl acid, may be unconscious.
Treatment: do not induce vomiting unless directed by medical personnel, it is necessary to transfer to the immediate medical institution
Do not to be mixed with strong bases, metals and alloys, reducing agent and combustible substances, potent oxidants.
Store in a cool place, good ventilation, warehouse background with anti-corrosion layer or asphalt.
Use of compatible materials to make containers for transporting acid HCl.
Notation: T, C
S 36/37/39: Use protective clothing, gloves, respirators
S 45: In case of accident or discomfort must be taken to the nearest medical authority
S 26: If the acid HCl enters the eye should wash eyes with plenty of water.