Hydrochloric Acid 31% Technical Grade

Product Overview

Hydrochloric Acid 31% Technical Grade is a strong mineral acid supplied as a colorless aqueous solution of hydrogen chloride (CAS 7647-01-0). Many buyers know it by its trade name: muriatic acid. At 31%, it sits at the working strength most industrial operations actually run — strong enough to strip mill scale, dissolve carbonate deposits and drive pH down fast, without the fuming intensity of more concentrated grades.

we distribute this product in our Taylor, TX warehouse and ship it daily in DOT-compliant corrosive packaging. The buyers who order it most are water-treatment operators dosing for pH control, metal-finishing and fabrication shops running pickling and descaling lines and plants that need a reliable strong acid as a process technical. Technical grade is the right call when your process tolerates trace impurities — which covers most cleaning, etching and pH-adjustment work.

Why This Concentration

Pick 31% when you want full working strength delivered as-is. It is the standard commercial concentration for muriatic acid: one drum does the work of several drums of dilute product, which cuts your freight cost per unit of active acid and reduces container handling. Shops that dilute in-house buy 31% and cut it down to their bath spec.

The trade-off is handling. A 31% solution produces irritating vapor and reacts aggressively with metals and bases, so it demands ventilation, acid-rated PPE and corrosion-resistant transfer equipment. If your crew doses small quantities by hand, or your process only ever calls for a dilute acid, a pre-diluted strength is often the safer and simpler buy. We stockHydrochloric Acid 15% Technical Gradefor mid-strength cleaning and pH work, andHydrochloric Acid 5% Technical Gradefor light-duty and fine-adjustment applications where you want minimal fuming at the point of use.

Chemical Profile

Hydrochloric acid solution is a colorless, watery liquid with a sharp, pungent, irritating odor. It is hydrogen chloride gas dissolved in water; the solution sinks and mixes with water and gives off irritating vapor. Our published product data for this 31% w/w solution lists a density of 1.155 at 20 °C, a solubility of 82.3 g/100 g at 32 °F and a vapor pressure of 413.6 mmHg. The formula is HCl with a molecular weight of 36.46, under CAS number 7647-01-0. The vapor is what an operator notices first when a container is opened — plan ventilation around it.

Industrial Applications

These are the real, established uses we ship this product into:

• pH adjustment in water treatment.Hydrochloric acid is a workhorse for lowering pH in treatment trains, neutralizing alkaline streams and controlling scale-forming conditions. At 31%, a metering system moves less volume per unit of acidity than with dilute grades.
• Metal cleaning, pickling and descaling.The acid dissolves rust, mill scale and oxide layers from steel ahead of welding, coating, or galvanizing and clears mineral scale from process equipment. This is the classic muriatic acid job.
• Masonry and concrete surface cleaning.Diluted, it etches concrete and removes efflorescence and mortar haze — standard practice in surface prep trades.
• Chemical processing.Hydrochloric acid serves as a technical and pH-control acid in a wide range of production chemistry, from chloride salt production to catalyst regeneration.
• Technical and QC use.Technical grade suits general bench work such as titrations and sample digestion where a certified analytical grade is not required.

Handling & Storage

This product carries the signal wordDanger(per the product's GHS classification). Its hazard statements are: H290 May be corrosive to metals; H314 Causes severe skin burns and eye damage; H335 May cause respiratory irritation (per the product's GHS classification). Treat every transfer accordingly.

Wear acid-resistant gloves, splash goggles or a face shield and chemical-resistant clothing and work with ventilation adequate to keep vapor away from the breathing zone. Store in a cool, dry, well-ventilated area in corrosion-resistant containers — HDPE is standard; we ship it in HDPE for a reason. Keep it away from bare metals, which it attacks and away from strong bases and oxidizers, which react exothermically. Never add water to concentrated acid when diluting; add acid to water. Keep neutralizing material and a spill kit staged wherever the product is stored or used. This handling guidance is reviewed by Andre Taki, DOT Hazmat Specialist.

Hazmat & Shipping

This is a regulated hazardous material and we ship it accordingly, every day. It moves as UN1789 (per 49 CFR 172.101), proper shipping name Hydrochloric acid (per 49 CFR 172.101), Hazard Class 8 — Corrosive (per 49 CFR 172.101), Packing Group II (per 49 CFR 172.101). Every order leaves our Taylor, TX dock in UN-rated packaging with the correct Class 8 labels, markings and shipping papers. You do not need to figure out hazmat compliance on your end for the inbound shipment — that is our job and we charge no hazmat fees.

Documentation

A Safety Data Sheet ships with every order and we maintain the SDS in English, Spanish, French and Japanese. A lot-specific Certificate of Analysis is available for the material you receive and a Technical Data Sheet is available for spec review before you buy. If your EHS or purchasing team needs documents ahead of the order, ask — we send them same day.

Why Buy from Alliance Chemical

We are a chemical distributor and hazmat shipping operation, not a storefront reselling someone else's logistics. Hydrochloric acid 31% is a daily-mover for us: it is stocked in Taylor, TX, packed by crews who handle Class 8 corrosives every shift and shipped in DOT-compliant packaging with the paperwork done right. Our shipping and handling guidance is reviewed by a DOT Hazmat Specialist. From a single quart to 330-gallon totes, you get the same product, the same documentation and a supplier who answers the phone when your line is down.