Hydrochloric Acid 33%, 37% (CAS 7647-01-0)

Hydrochloric Acid 33%, 37% (CAS 7647-01-0)

Hydrochloric acid, also known as muriatic acid, is an aqueous solution of hydrogen chloride. It is a colorless solution with a distinctive pungent smell. It is classified as a strong acid. It is a component of the gastric acid in the digestive systems of most animal species, including humans. Hydrochloric acid is an important laboratory reagent and industrial chemical.

Physical properties of hydrochloric acid, such as boiling and melting points, density, and pH, depend on the concentration or molarity of HCl in the aqueous solution. They range from those of water at very low concentrations approaching 0% HCl to values for fuming hydrochloric acid at over 40% HCl.

Hydrochloric acid as the binary (two-component) mixture of HCl and H2O has a constant-boiling azeotrope at 20.2% HCl and 108.6 °C (227 °F). There are four constant-crystallization eutectic points for hydrochloric acid, between the crystal form of [H3O]Cl (68% HCl), [H5O2]Cl (51% HCl), [H7O3]Cl (41% HCl), [H3O]Cl·5H2O (25% HCl), and ice (0% HCl). There is also a metastable eutectic point at 24.8% between ice and the [H7O3]Cl crystallization. They are all Hydronium salts.

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Industries: Paints and varnishes, Household chemicals, Fertilizers,Adhesives, oils, greases, Pharmaceutical industry
CAS number: 7647-01-0
WE number: 231-595-7
Index number: 017-002-01-x
Chemical formula: HCl
Molar mass: 36,45 g/mol
Customs tariff code: 28061000
ADR: UN1789

Other physical properties

pH: <1
Melting / freezing point: < - 20°C
Boiling point / range: 50°C
Relative density: >1123 kg/m3 w 20°C

Dimensions	N/A
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