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7647-01-0 Structure

7647-01-0 Structure

Hydrochloric acid


Chlorohydric acid
Acide chlorhydrique
Acido cloridrico
Anhydrous hydrochloric acid
Anhydrous hydrogen chloride

【Molecular Formula】

【MDL Number】

【Molecular Weight】

【MOL File】

Chemical PropertiesBack Directory

colourless gas
【mp 】

-35 °C
【bp 】

57 °C
【density 】

1.2 g/mL at 25 °C(lit.)
【vapor density 】

1.3 (vs air)
【vapor pressure 】

613 psi ( 21.1 °C)
【Fp 】

【storage temp. 】

【solubility 】

H2O: soluble
【form 】


Stable. Incompatible with alkalies, most metals. Avoid contact with water.
【Water Solubility 】

【Sensitive 】

Air & Light Sensitive
【Merck 】

【CAS DataBase Reference】

7647-01-0(CAS DataBase Reference)
【NIST Chemistry Reference】

Hydrogen chloride(7647-01-0)
【EPA Substance Registry System】

7647-01-0(EPA Substance)
Safety DataBack Directory
【Hazard Codes 】

【Risk Statements 】

R36/37/38:Irritating to eyes, respiratory system and skin .
R37:Irritating to the respiratory system.
R34:Causes burns.
R35:Causes severe burns.
R23:Toxic by inhalation.
R20:Harmful by inhalation.
R11:Highly Flammable.
R67:Vapors may cause drowsiness and dizziness.
R66:Repeated exposure may cause skin dryness or cracking.
R22:Harmful if swallowed.
R19:May form explosive peroxides.
R12:Extremely Flammable.
R40:Limited evidence of a carcinogenic effect.
R20/22:Harmful by inhalation and if swallowed .
【Safety Statements 】

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 label where possible) .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
S9:Keep container in a well-ventilated place .
S33:Take precautionary measures against static discharges .
S29:Do not empty into drains .
S16:Keep away from sources of ignition - No smoking .
S46:If swallowed, seek medical advice immediately and show this container or label .

UN 2924 3/PG 2
【WGK Germany 】


【F 】

【HazardClass 】

【PackingGroup 】

【Hazardous Substances Data】

7647-01-0(Hazardous Substances Data)
Raw materials And Preparation ProductsBack Directory
【Raw materials】

Sodium carbonate-->Sodium chloride-->Nitrogen-->Chlorine-->Hydrogen-->Oxygen-->Potassium chloride -->Compressor
【Preparation Products】

2-FLUOROPHENETHYL ALCOHOL-->2,4-Dimethoxybenzoic acid-->(E)-2-(2-Nitroethenyl)thiophene-->3-Phenoxypropionic acid-->trans-Ferulic acid-->3-Hydroxy-2-iodo-6-methylpyridine-->4-CARBOXYPHENYL ISOTHIOCYANATE-->4-NITROISOPHTHALIC ACID-->1,2,3,4-THIATRIAZOL-5-AMINE-->4,6-DIMETHOXYPYRIMIDINE-2-CARBOXYLIC ACID-->QUINUCLIDINE HYDROCHLORIDE-->4-METHOXY-3-METHYLBENZYL CHLORIDE-->METHYLENEDIPHOSPHONIC ACID-->QUINOXALINE-2,3-DICARBOXYLIC ACID-->2-Chloro-3,4-diaminopyridine -->Daidzein-->2-(2-Chloroethoxy)ethanol-->Chlortetracycline hydrochloride-->N-(2-Naphthyl)aniline-->STRONTIUM HYDROXIDE OCTAHYDRATE-->2-Chloroethyl chloroformate-->1,2-Difluorobenzene-->Rubber peptizer-->Pigment Yellow 14-->Potassium clavulanate-->Sodium 2,3-dihydroxynaphthalene-6-sulfonate-->C.I.Vat Red 29-->4,6-DIMETHYL-2-THIOPYRIMIDINE-->1H-Benzimidazole-5-carboxylic acid-->4-Deoxypyridoxine hydrochloride-->C^{12^} fatty alcohol polyoxyethylene ether ammonium sulfate-->3,5-Dichlorophenyl isocyanate-->tert-Butylferrocene-->Norfloxacin Hcl-->Ethylenediamine dihydrochloride-->4-Nitrophenyl isocyanate-->Granisetron hydrochloride-->Propyl chloroformate-->1,2,4,5-Tetrafluorobenzene-->1,3-Dichloro-5,5-dimethylhydantoin
Material Safety Data Sheet(MSDS)Back Directory
【msds information】

Hydrochloric acid(7647-01-0).msds
Hazard InformationBack Directory
【Reactivity Profile】

ANHYDROUS HYDROGEN CHLORIDE is an anhydrous (no water) strong acid. Reacts rapidly and exothermically with bases of all kinds (including amines and amides). Reacts exothermically with carbonates (including limestone and building materials containing limestone) and hydrogen carbonates to generate carbon dioxide. Reacts with sulfides, carbides, borides, and phosphides to generate toxic or flammable gases. Reacts with many metals (including aluminum, zinc, calcium, magnesium, iron, tin and all of the alkali metals) to generate flammable hydrogen gas. Reacts violently with acetic anhydride, 2-aminoethanol, ammonium hydroxide, calcium phosphide, chlorosulfonic acid, 1,1-difluoroethylene, ethylenediamine, ethyleneimine, oleum, perchloric acid, b-propiolactone, propylene oxide, silver perchlorate/carbon tetrachloride mixture, sodium hydroxide, uranium(IV) phosphide, vinyl acetate, calcium carbide, rubidium carbide, cesium acetylide, rubidium acetylide, magnesium boride, mercury(II) sulfate [Lewis]. Undergoes a very energetic reaction with calcium phosphide [Mellor 8:841(1946-1947)]. Corrosive to metals and tissues and irritating to the eyes and respiratory system. Corrodes galvanized or copper-alloy metals (brass, bronze); fittings of stainless steel or mild or cast steel must therefore be used. Reacts with calcium carbide with incandescence [Mellor 5:862(1946-1947]. Absorption on mercuric sulfate becomes violent at 125°C. [Mellor 2, Supp. 1:462(1956)].
【Air & Water Reactions】

Fumes strongly in moist air. Soluble in water with evolution of heat.
【Health Hazard】

Gas concentrations of 50 to 100 ppm are tolerable for 1 hour. Concentrations of 1,000 to 2,000 ppm are dangerous, even for brief exposures. More severe exposures will result in serious respiratory distress and prolonged exposures will result in death. Mists of hydrochloric acid are considered less harmful than anhydrous hydrochloric acid, because droplets have no dehydrating action. Individuals with respiratory problems and digestive diseases may be adversely affected by low level exposures to the gas or mist.
【Fire Hazard】

Fire may produce irritating or poisonous gases. Containers may explode in heat of fire. At high temperatures, HYDROGEN CHLORIDE, ANHYDROUS decomposes into hydrogen and chlorine. The following materials should be avoided: Mercuric sulfate -- violent reaction with gaseous hydrochloric acid at 250F. Sodium -- reacts vigorously with gaseous hydrochloric acid. Acetic anhydride, 2-aminoethanol, ammonium hydroxide, chlorosulfonic acid, ethylene diamine, ethyleneimine, oleum, propiolactone, sodium hydroxide, sulfuric acid, and vinyl acetate -- increase in temperature and pressure when mixed with hydrochloric acid. Calcium phosphide -- energetic reaction with hydrochloric acid. Silver perchlorate and carbon tetrachloride -- when mixed in combination with hydrochloric acid forms a compound that detonates at 105F. Formaldehyde -- when mixed with hydrochloric acid forms a human carcinogen. Material reacts violently with bases and is corrosive with the generation of heat. Reacts with base metals, forming combustible gas (hydrogen). Reacts violently with strong oxidants forming toxic gas (chlorine). Avoid heat; at high temperatures HYDROGEN CHLORIDE, ANHYDROUS will decompose into hydrogen and chlorine.
Well-known Reagent Company Product InformationBack Directory
【Acros Organics】

【Alfa Aesar】

Hydrogen chloride, nominally 2.5M in ethanol(7647-01-0)
【Sigma Aldrich】


Hydrogen Chloride  (ca. 4mol/L in 1,4-Dioxane)(7647-01-0)
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