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Hydrogen Chloride

High-purity hydrogen chloride

Air Liquide manufactures hydrogen chloride pure gas to be used in a variety of chemical manufacturing (rubber and vinyl) applications and laboratory applications, and is available with up to 99.9995% purity. Hydrogen chloride is also available as part of Scott™ brand specialty gas mixtures used in environmental, industrial hygiene and safety, and semiconductor applications. ACULIFE™ cylinder treatment assures mixture stability and accuracy.


GMACS Hydrogen Chloride Calibration Standards (Gas Manufacturer’s Alternative Certified Standards): Scott brand GMACS HCl calibration standards were designed to fill the regulatory void caused by the absence of EPA Protocol gases for HCl monitoring. Scott brand GMACS are used for the primary calibration of CEMS HCl monitors at stationary sources. Certified daily calibration standards are used for regular QA and periodic RATA testing of HCl CEMS.

GMACS are engineered calibration gases for stationary sources that are subject to compliance under the following EPA regulations:

  • 40 CFR Part 63 Subpart LLL (Portland Cement MACT)
  • 40 CFR Part 63 Subpart UUUUU (Utility MACT)
  • 40 CFR Part 63 Subpart DDDDD
  • 40 CFR Part 60 Subparts CCCC and DDDD

Learn more about the development and specifications of Scott brand GMACS hydrogen chloride standards.

Other Environmental Applications: Scott brand hydrogen chloride gas mixtures are ideal for calibrating CEMs used to measure HCl emissions and are used in conjunction with the US EPA methods listed below. These standards are offered as either Certified Working Class™ or CEM 2% DAILY STANDARDS™ to maximize your daily CEM performance.

  • Methods 26 and 26A determine HCl emissions from combustion stacks, primarily waste incinerators
  • Method 321 determines HCl emissions from Portland cement kilns through the use of Fourier Transform Infrared (FTIR) spectroscopy
  • Product Specifications

Hydrogen Chloride Pure Gas Grades
Hydrogen Chloride Gas Mixtures
GMACS Hydrogen Chloride Calibration Standards

Related Supply Modes

Air Liquide packages hydrogen chloride pure gases and gas mixtures in a variety of high-pressure stainless cylinders, as well as nonreturnable Mini-Mix™ Transportable cylinders, depending on the grade of pure gas or mixture composition and your application.

Related Equipment

Air Liquide manufactures gas handling equipment to deliver pure hydrogen chloride specialty pure gas and gas mixtures safely to your point of use, including gas pressure regulators, cross purge assemblies and gas manifolds.

Related Industries