How To Dispose Of Muriatic Acid

A less pure form of hydrochloric acid, Muriatic acid is sold in high quantities for house restoration and maintenance chores. Although this potent chemical agent is inexpensive, it is extremely corrosive. Working with it, in fact, poses several health risks: Skin contact can cause serious burns, inhaling its fumes can burn the lining of the lungs and nose, and contact can cause irreversible eye damage or blindness.

Muriatic acid should never be used casually by homeowners. Instead, it is often a last resort for cleaning, preparing, deoxidizing, or removing mold from masonry, concrete, metal, and swimming pools after less toxic treatments have failed.

Before using such a dangerous substance, you should know about the disposal of muratic acid. By the end, you’ll see how to use this and other substances safely in large quantities, why you need to wear safety goggles, and more. But, most importantly, you’ll know what to do with leftover muriatic acid. (Learn How To Dispose Of Spoiled Milk)

muriatic acid

Muriatic Acid vs. Hydrochloric Acid

Muriatic acid is a type of hydrochloric acid. However, unlike hydrochloric acid, muriatic acid contains HCI molecules and contaminants to the base mix, such as iron.

Muriatic acid is slightly yellow because of the extra iron component, whereas hydrochloric acid is white. The strength of pure hydrochloric acid is usually employed in laboratories with strict safety safeguards in place.

However, even while weaker, you need to use and dispose of muriatic acid safely.

Essential Safety Using Muriatic Acid

Muriatic acid must be used, stored, and disposed of with extreme caution because of its potential to cause so much damage with just one wrong action.

Before starting any acid-related project, follow these guidelines:

  • Use full-face protection, a respirator, thick, full-coverage clothing, and acid-resistant protective gloves to avoid fumes.
  • Water must be added to make diluted muriatic acid in a mixture of one part muriatic acid to ten parts water.
  • Pour the acid into the water slowly and carefully while making a mixture. Never add water to acid because it will cause an exothermic reaction, causing the toxic substance to spill out of the container.
  • Never pour muriatic acid into an empty container. Add water first before you add muriatic acid safely.
  • Never mix muriatic acid with other acids.
  • Only use glass or acid-resistant plastic containers for muriatic acid.
  • Keep muriatic acid in the original container.

If you need to neutralize muriatic acid quickly, keep baking soda or garden lime on hand.

  • While sprinkling these ingredients’ full strength will work, the ideal plan is to combine 1/2 cup of baking soda with a quart of water in a sealed spray bottle and keep it nearby.
  • In case of inadvertent splashing, work a hose or a large water container nearby to wash your skin.
  • Muriatic acid must be administered with a plastic sprayer if it is to be used on large surface areas.
  • Because the plastic will disintegrate quickly, you’ll probably need over one to finish the job.
  • Contact your local recycling center for details on how to dispose of muriatic acid in your area safely.

Primary Uses of Muriatic Acid:

Muriatic acid can restore your pool’s surface to new.

  1. Spray a 1:16 acid-to-water diluted solution on the emptied pool surface.
  2. Scrub tough spots with a nylon brush.
  3. Rinse with normal water.

pH Balance In Pool

Muriatic acid can balance a pool’s pH if it is too high. You can purchase swimming pool acid to do the same thing. (Learn How To Dispose Paint Thinner)

The methods and formulas for using muriatic acid in a swimming pool will be detailed.

  1. All you do is add it to your pool.
  2. Let it sit for a few hours and re-check your pH levels

How to Dispose of Muriatic Acid

Like many potent chemicals used for cleaning and repair, muriatic acid must be dealt with in the same way as to how to dispose of hydrochloric acid.

Disposing of muriatic acid must be done safely for your home and the environment.

First, don’t try and neutralize any used or leftover acid. You will need to contact your local recycling center.

Here are quicker ways of dealing with this acidic compound:

muriatic acid on pool

Dispose of Muriatic Acid In Your Pool

Muriatic acid is a must-have pool chemical, and it is one of the easiest ways you can get rid of your muriatic acid instead of having to pour it down the sink.

If the pH is too high, add muriatic acid to decrease it to 7.4-7.6.

Acid Wash Concrete Using Muriatic Acid

Another option to dispose of or use up leftover muriatic acid or hydrochloric acid is to acid wash your concrete or pool walls.

  1. Muriatic acid can be used to remove stained pool walls or concrete.
  2. Combine 3 parts water and 1 part acid in a mixing bowl.
  3. Pour the acid into the water, not the water into the acid, while mixing as it avoids hazardous chemical reactions.
  4. You can apply it to the concrete or pool wall, scrub it, and then wash it off with a pressure washer after 10 minutes.

Recycle Muriatic Acid

A Council Waste Disposal facility will be in the vicinity of most towns and cities. They show you how to safely dispose of muriatic acid and other household chemicals like bleach and chlorine.

They have the equipment to handle any hazardous chemical substances and will process them in the most environmentally friendly manner possible.

muriatic acid on drain

Pour Muriatic Acid Down the Drain

Hydrochloric acid and muriatic acid can be disposed of in the sewage or down storm drains in various states and towns once it is diluted muriatic acid or neutralized.

Check with the state or municipality to see if this is permitted or prohibited.

Second, never pour full-strength muriatic acid down a drain or sewer. To avoid damage to pipes, animals, or plants, you’ll need to neutralize it before doing so. (Learn How To Dispose Ashes)

Clean Toilets With Leftover Muriatic Acid

Use the remaining muriatic acid to clean your toilet instead of disposing of muriatic acid.

  1. You’ll first need to dilute it. For example, most muriatic acid (also known as Hydrochloric Acid – HCL) used in swimming pools is diluted in various concentrations.
  2. A 30-40% strength is common; check the bottle label for this information.
  3. Dilute it more before using it to clean your toilet — 1 part acid to 10 parts water is a good ratio.
  4. Fill your toilet with roughly half a cup of diluted acid and let it sit for 30 minutes to 3 hours.
  5. Scrub the toilet bowl and flush the toilet. The staining should come out in large chunks.

How to Neutralize Muriatic Acid

Neutralizing muriatic acid is only suitable for small amounts. If you have gallons of it, you’ll need to use way too much neutralizer, so it’s best to take it to your hazardous materials center for disposal or keep it for other uses around the house.

What You Need:

  • Safety goggles and Safety mask
  • Acid Resistant Rubber gloves
  • Long clothing to protect your arms and legs
  • A long rubber apron
  • A wide-mouth bucket
  • Baking soda
  • Access to water, running water is best, so a faucet or hose is recommended

Muriatic Acid Disposal and Safety Precautions:

Muriatic Acid is highly corrosive and should not be used on the skin. It also emits a toxic hydrogen chloride vapor that should not be inhaled.

This vapor can cause your organs and respiratory tract to fail, so wear protective clothing.

Work in a well-ventilated area away from heat and metal to cause chemical reactions. Finally, keep kids and pets away from the area.

Step One:

  1. Add 1 part baking soda to 10 parts water in a large bucket
  2. The amount of baking soda required depends on the volume and strength of muriatic acid.
  3. You’ll need roughly 5.5lbs for acid at 30% strength per gallon of muriatic acid. Check the bottle’s label for strength.

Step Two:

  1. Add up to 1/2 gallon of acid to the baking soda solution.
  2. Do this slowly as it will fizz.
  3. Pour the acid into the water mix, not the water into the acid.
  4. Wait for it to fizz out. This takes 5 minutes until it is neutralized.

 Step Three:

Keep adding acid to the baking soda solution until it stops fizzing.

If there is no fizzing after adding more baking soda, the muriatic acid has been neutralized and is safe to dispose of.

Can You Dispose of Muriatic Acid Down the Drain?

Undiluted muriatic acid should not be flushed. It may melt plastic and harm metal pipes. Professional plumbers use it to unblock drains, but they do so safely.

Water on top of acid causes problems. An exothermic chemical reaction may occur.

The liquid may erupt violently from the drain, inflicting eye or skin harm. If your plastic pipes are melted or damaged by the chemical reaction,

After neutralizing your muriatic acid using the aforementioned method, you can safely flush it down the drain with plenty of water if your municipality allows it.

Are plastic containers safe for muriatic acid?

You can store muriatic acid safely stored in HDPE and HDPE containers. There. Muriatic acid should not be stored in ABS or polypropylene plastic containers.

Safe plastic containers to store muriatic acid include:

Ensure your acid is in a plastic bottle and mark it properly. Keep it cool, dark, dry, and ventilated, and don’t store it in large amounts.

  1. Use a solution of 90% water and 10% baking soda to neutralize used aliquots and empty muriatic acid containers.
  2. Pour the mixture into the containers until they are about 25% full.
  3. In the container, stir or agitate the contents.
  4. Carefully Pour one-quarter to one-half cup of hydrochloric acid into 2 to 5 gallons of water slowly and carefully.
  5. It’s critical to always add the chemical to the water rather than the chemical.
  6. Fill the sink halfway with water and slowly add the diluted solution down the drain. To avoid splashes, work slowly.

Will Vinegar Neutralize Muriatic Acid?

Many ask, will vinegar neutralize muriatic acid? Since vinegar is a diluted acid, it will react with and neutralize some of the acids by weakening them, but it could leave it harmful.

Using alkali (base) to neutralize hydrochloric acid, such as sodium bicarbonate (baking soda), is much safer.

How To Dispose Of Muriatic Acid (1)

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