HCl Acid

Hydrochloric acid is hydrogen chloride gas (HCl) dissolved in water, and this product is standardized at 15% HCl by weight (CAS 7647-01-0), a Technical Grade dilution built for dependable, repeatable industrial use.

Concentration is the most important number to check when buying HCl, because the same chemical is sold at very different strengths. This 15% solution is deliberately milder than muriatic acid (typically around 31.45% HCl) and far below ACS reagent-grade 37% acid. A lower concentration means less aggressive fuming, easier metering, and simpler on-site handling, while still delivering the full acidity of hydrogen chloride in solution.

Choose 15% when your process is calibrated for a dilute feed, when you want to reduce vapor and splash hazard, or when you would otherwise dilute a stronger acid yourself. It is a colorless to faintly yellow liquid supplied as a true aqueous solution.

Hydrochloric acid is sold along a concentration ladder, and grade plus strength together define what you are buying. The three most common tiers are 15% Technical (this product), muriatic acid near 31.45%, and ACS reagent-grade around 37%.

• 15% Technical Grade - a dilute, general-purpose feed for controlled industrial dosing.
• Muriatic (~31.45%) - a stronger commodity acid common in masonry and pool work.
• ACS reagent (~37%) - high-purity acid for analytical and laboratory use.

HCl exists only as an aqueous solution; there is no solid or powdered form. Technical Grade means the acid meets industrial purity specifications rather than analytical-reagent specifications, which is appropriate for the vast majority of manufacturing, treatment, and cleaning applications. If your equipment or recipe calls for a specific percentage, match the concentration exactly rather than substituting a stronger acid without recalculating your dilution.

15% hydrochloric acid is used wherever a controlled, moderate-strength acid is needed for pH adjustment, metal surface treatment, and general processing. The dilute concentration makes it well suited to applications that would be over-driven by muriatic or reagent-grade acid.

• pH control and neutralization of alkaline process streams and wastewater.
• Metal pickling and descaling to remove rust, mill scale, and oxides before finishing.
• Concrete and masonry etching to open the surface profile before coating.
• Ion-exchange resin regeneration in water-treatment systems.
• Mineral and ore processing, and general acid demand in chemical manufacturing.

Because it is standardized at 15%, dosing is more predictable and repeatable than diluting a stronger acid on site. Always run a small compatibility and rate test before scaling to a full batch, and confirm the acid strength suits your substrate.

Store 15% hydrochloric acid in a cool, dry, well-ventilated area in its original tightly closed HDPE or polyethylene container. Keep it out of direct sunlight and away from heat sources, ideally between roughly 4 and 30 °C.

HCl attacks most metals, so keep containers off bare concrete and metal shelving and use secondary containment sized for the vessel. Acid vapor is corrosive to nearby equipment, so segregate storage from unprotected tools and electronics. Keep hydrochloric acid separated from bases, oxidizers such as bleach or nitric acid, and from cyanides, sulfides, and metals, because these combinations can release toxic or flammable gases.

• Use vented closures rated for acids to relieve pressure.
• Label containers clearly and never reuse them for other chemicals.

The 15% solution stays liquid well below -20 °C, so freezing is rarely a concern in normal storage.

Hydrochloric acid 15% has an effectively indefinite shelf life, typically rated at two or more years, when stored sealed in a compatible container. The molecule itself does not break down or oxidize the way organic products do, so a properly stored solution remains usable long after purchase.

The practical limit on shelf life is loss of concentration rather than spoilage. Because HCl is volatile, an open or poorly sealed container can release hydrogen chloride vapor over time, gradually lowering the acid strength. A faint yellow tint from trace iron does not indicate that the acid has gone bad.

• Keep containers tightly closed between uses to preserve titer.
• Verify concentration by titration before any process where exact strength matters.
• Store away from heat to minimize vapor loss.

Rotate inventory first-in, first-out and reseal immediately after dispensing.

Hydrochloric acid 15% is corrosive and requires chemical splash goggles, a face shield, acid-resistant gloves such as nitrile or neoprene, and protective clothing at all times. Skin and eye contact cause burns, and the vapor irritates the eyes, nose, throat, and lungs.

Work only in a well-ventilated area or under local exhaust to keep vapor concentrations low. When diluting, always add acid slowly to water, never water to acid, to control the heat released. Have an eyewash station and safety shower within immediate reach.

• Never mix HCl with bleach, oxidizers, or bases; these reactions release hazardous gases and heat.
• Keep incompatible metals and cyanide or sulfide compounds well away.
• Neutralize small spills cautiously with a mild base such as soda ash and absorb the residue.

It is classified as DOT Class 8, UN 1789. Always consult the SDS before handling.

Dispose of hydrochloric acid only in accordance with federal, state, and local regulations, never by pouring concentrated acid down a drain. Spent or waste HCl commonly meets the RCRA corrosivity characteristic (waste code D002) and must be managed as hazardous waste unless properly neutralized and documented.

Small quantities can often be carefully neutralized to a near-neutral pH with a mild base such as soda ash or lime, but this should be done only within your facility's permitted procedures and discharge limits. Larger volumes should be handled by a licensed hazardous-waste contractor.

• Transportation follows DOT Class 8, UN 1789 corrosive requirements.
• Keep the SDS and manifest records with the shipment.
• Confirm your local publicly owned treatment works discharge limits before any neutralization.

The product ships as fully compliant DOT hazmat ground freight from Taylor, TX.