295426 Aldrich

Hydrogen chloride

ReagentPlus®, ≥99%



Related Categories Acids, Acids & Bases, Chemical Synthesis, Inorganic Acids, Specialty Gases,
grade   ReagentPlus®
vapor density   1.3 (vs air)
vapor pressure   613 psi ( 21.1 °C)
assay   ≥99%
bp   −85 °C(lit.)
mp   −114 °C(lit.)
density   1.2 g/mL at 25 °C(lit.)


Frequently Asked Questions

Frequently Asked Questions are available for this Product.

Other Notes

For 295426-230G-EU packaging: 1000 mL of steel cylinder equipped with stainless steel valve.


227 g in steel cylinder

Recommended products

• For 295426-227G: Monel control valve Z146978 or Monel gas regulator Z562483 is recommended.
• For 295426-230G-EU: outlet fitting: DIN 477-1 no.1, Z742162 or Z742164 are the recommended regulators.

Legal Information

ReagentPlus is a registered trademark of Sigma-Aldrich Co. LLC

Price and Availability

Cross-Coupling Guide
Safety & Documentation

Safety Information

Signal word 
Hazard statements 
UN1050 - class 2 - Hydrogen chloride, anhydrous
WGK Germany 

Frequently Asked Questions

Which document(s) contains shelf-life or expiration date information for a given product?
If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis. These documents are located on the product detail page under Useful Links & Tools. Click on the following link to search for a Certificate of Analysis. Please click the following link to see the details on our Product Dating Information.
How do I get lot-specific information or a Certificate of Analysis?
A Certificate of Analysis is available by lot number and can be obtained through our Advanced Search Option:
What type of cylinder does the Product 295426, Hydrogen Chloride, come in?
The Hydrogen Chloride is packaged in a lecture bottle.  The cylinder will be about one foot in length and about two inches in diameter.  For 295426-227G, the valve on the cylinder has a CGA 180M / 110F fitting on it, while DIN 477-1 fittings are found on 295426-230-EU.  The cylinder mass is approximately 1023g (empty) and the valve mass is approximately 206g, giving a total approximate mass of 1229g.  The cylinders are DOT rated (rating is stamped on cylinder). To view a lecture bottle please visit:
What is the pressure of the cylinder containing Product 295426, Hydrogen Chloride?
Approximately 600psi.For additional information on gas equipment please visit:
Can empty lecture bottles be returned?
Yes, empty lecture bottles can be returned using one of two methods.  You can either call Technical Service at 1-800-231-8327 or send an email to to have a Lecture Bottle Return Packet sent to you.  The packet will include terms and conditions for returning the cylinder(s) and fees.  Cylinders cannot yet be returned in Europe.  Please note:  Cylinders must be empty to be accepted.
What equipment is needed to use the Hydrogen Chloride cylinder for Product 295426?
Since Hydrogen Chloride is a corrosive gas, only Stainless Steel or Monel equipment should be used.  For 295426-227G, Monel control valve Z146978 or Monel gas regulators Z406058, Z406066 are recommended.  We would also recommend a Cross Purge Assembly, Z562483 be used in conjunction with the regulators.  A Stainless Steel Hose Barb Adapter Z146838 may also be needed depending on the setup being used.  For 295426-230-EU, regulators Z742162 or Z742164 are recommended. For additional information on how to use the above stated equipment, please click on the following link: and select Technical Bulletin AL 151.  If you are interested in a complete and ready-to-use setup, you may want to consider using a Lecture Bottle Station: and select Technical Bulletin AL-234.  Additional gas equipment can be found at:
Is there a deposit for the cylinder containing Product 295426, Hydrogen Chloride,?
No, we do not require a deposit for lecture bottle cylinders.  However, you can return the lecture bottles. 
How do I find price and availability?
There are several ways to find pricing and availability for our products.  Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers. 
What is the Department of Transportation shipping information for this product?
Transportation information can be found in Section 14 of the product's (M)SDS. To access the shipping information for this material, use the link on the product detail page for the product, or search here. 
My question is not addressed here, how can I contact Technical Service for assistance?
Use the option to the right to "Ask a Question" by email of a Technical Service Scientist.
Show more questions
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