Hydrochloric Acid, HCL,Chlorohydric Acid, Hydrogen Chloride, Muriatic Acid, 7647-01-0

Hydrochloric Acid, HCL,Chlorohydric Acid, Hydrogen Chloride, Muriatic Acid, 7647-01-0

CAS: 7647-01-0

Molecular Formula: HCl

Names and Identifiers

Physico-chemical Properties

Risk and Safety

Hazard Symbols	C - Corrosive
Risk Codes	R34 - Causes burns R37 - Irritating to the respiratory system
Safety Description	S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
UN IDs	UN 1789

Upstream Downstream Industry

Nature

This product is a colorless irritating aqueous solution, volatile, irritating odor. Because it contains trace iron (iron oxide), free chlorine or organic matter, it is light yellow. Strong acid, can be mixed with water and ethanol in any ratio. Strong corrosive, and alkali neutralization, and phosphorus, sulfur and other non-metallic substances have no effect.

Preparation Method

hydrogen gas and chlorine gas generated in the process of producing caustic soda by salt electrolysis in the chlor-alkali industry are passed into a synthesis furnace for combustion to generate hydrogen chloride gas, which is cooled and absorbed with water to prepare hydrochloric acid. Alternatively, HCI may be obtained by reacting salt with H2S04 and absorbed with water.

Standard

This product containing HC1 should be 36.0% ~ 38.0% (g /g).

Trait

This product is colorless smoke clear liquid; There is a strong stimulation of odor; Strong acid.

Use

chemical cleaning with hydrochloric acid as the main agent has the advantages of strong function, fast speed, obvious effect, convenient use, low cost, suitable for carbon steel, copper, but not for austenitic stainless steel, chemical cleaning of titanium and other materials.

Differential diagnosis

1. This product is chloride identification reaction (General 0301).
2. wet ammonia test solution with glass rod contacts the surface of the product, producing obvious white smoke.
3. a solution of hydrochloric acid (1-100) was taken to make the blue litmus paper red.

Safety

hydrochloric acid is toxic and corrosive. Exposure to concentrated hydrochloric acid can lead to severe burns and can cause permanent blindness by splash into the eye. Contact with the skin will produce dermatitis and photosensitization. Inhalation of hydrochloric acid vapor can cause Cough, dysphagia, Nausea, Vomit, extreme thirst, Diarrhea, and circulatory collapse and even death. When contacting and using hydrochloric acid, especially concentrated hydrochloric acid, the prescribed protective equipment should be worn to protect the eyes and skin. Measures should be taken to prevent the escape of hydrogen chloride gas from contaminating the atmosphere and entering the body. Do not mix with sulfuric acid, nitric acid; Do not mix with alkali, metal powder, oxidant, cyanide and water combustion products. Transport shall be carried out in accordance with the requirements of the relevant rules for the transport of dangerous goods.

Exam

free chlorine or bromine

take 5.4g of this product, dilute to 20ml with water, cool down, add 0.2m l of starch indicator solution containing zinc and potassium iodide, and the solution should not show blue within 10 minutes.

bromide or iodide

take 3ml of this product, dilute to 10ml with water, cool, add 1 drop of chloroform lm l and 0.002mol/L potassium permanganate solution, shake, chloroform layer should be colorless.

sulfate

take 25g of this product, add 2 drops of sodium carbonate test solution, and put it on a water bath to evaporate; Add 20ml of water to dissolve the residue, check according to law (General rule 0802), not more concentrated (0.0005%) than the control solution made from of standard potassium sulfate solution.

sulfite

take fresh boiling cold water 5 0mu plus lg of potassium iodide, 0.005mol/L iodine solution 0 .1 5ml and 1.5 of starch indicator solution, shake well; Another 5ml of this product, add 50ml of New boiling supercooled water to dilute, add to the above solution, shake, the blue color of the solution should not disappear completely.

ignition residue

take 0841g of this product, add 2 drops of sulfuric acid, steam dry, check according to law (general rule), residue shall not pass 2mg(0. 002%).

Iron Salt

Take 30g of this product, put it on a water bath and evaporate it to dryness. Add 25ml of water to the residue and check it according to law (General rule 0807). Compared with the control solution made of 0M l, it should not be deeper (0.0001%).

Heavy metals

Take 10g of this product, put it on a water bath to dry, add 2M l of acetate buffer (pH 0821) and an appropriate amount of water to make it U for inspection according to law (General rule first method), heavy metals should not be more than 2 parts per million.

arsenic salt

take this product 0822G, add water 22ml after dilution, add hydrochloric acid 5ml, according to the law (General Principles 0.0001% first law>, should comply with the provisions ().

Content determination

take about 3ml of this product, put it in a plug Erlenmeyer flask with about 20ml of stored water and precise weighing, add 25ml of water and 2 drops of Methyl red indicator solution, titration with sodium hydroxide titrant (lm o l/L). Each lm l sodium hydroxide titration solution (lm o l/L) corresponds to 36.46 mg of hc1.

Category

pharmaceutical excipients, p H value regulator.

Storage

Authoritative Data Verified Data