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Hydrochloric acid

ACS reagent, 37%

Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
EC Number:
MDL number:
PubChem Substance ID:

Quality Level


ACS reagent

vapor density

1.3 (vs air)

vapor pressure

3.23 psi ( 21.1 °C)
7.93 psi ( 37.7 °C)


36.5-38.0% (ACS specification)




≤1 ppm free chlorine

ign. residue

≤5 ppm


APHA: ≤10, free from suspended matter or sediment


>100 °C (lit.)


1.2 g/mL at 25 °C (lit.)

anion traces

bromide (Br-): ≤0.005%
sulfate (SO42-): ≤1 ppm
sulfite (SO32-): ≤1 ppm

cation traces

As: ≤0.01 ppm
Fe: ≤0.2 ppm
NH4+: ≤3 ppm
heavy metals: ≤1 ppm (by ICP)

SMILES string




InChI key


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500, 6×500 mL in PVC-coated bottle
2.5, 6×2.5 L in PVC-coated bottle
Single 2.5L units require a can opener to open the metal shipping container.


CorrosionExclamation mark

Signal Word


Hazard Statements

Hazard Classifications

Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1B - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

8B - Non-combustible, corrosive hazardous materials



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Origin

Enter Lot Number to search for Certificate of Origin (COO).

  1. 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.

  2. How do I get lot-specific information or a Certificate of Analysis?

    The lot specific COA document can be found by entering the lot number above under the "Documents" section.

  3. 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.

  4. What is the concentration of Product 320331, Hydrochloric acid?

    The specification range for concentration of 36.5 - 38.0% corresponds to a concentration range of 12.0 - 12.5 M.

  5. What does ACS stand for?

    ACS is the abbreviation for American Chemical Society. ACS grade reagents conform to specifications published by the American Chemical Society, and are suitable for use in analytical procedures.

  6. Is the concentration for Product 320331, Hydrochloric acid, given as w/w or w/v?

    The American Chemical Society specifies the concentration reported on a weight/weight basis.

  7. 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. 

  8. My question is not addressed here, how can I contact Technical Service for assistance?

    Ask a Scientist here.

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Acid and Base Chart — Table of Acids & Bases

Acid and base chart lists the strength of acids and bases (strongest to weakest) in order. Simple to use laboratory reference chart for scientists, researchers and lab technicians.

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