How long does it take for sulfuric acid to work?
Sulfuric acid can work very quickly, and you may see results in as little as ten seconds. Once you pour in the solution, walk away from the drain to prevent inhaling the fumes. To check if the cleaner got rid of the clog, slowly turn on the cold water after the initial ten seconds.
It's best to avoid acidic chemical cleaners that contain sulfuric acid or hydrochloric acid. Both can cause damage to drains, pipes, and tanks. These types of cleaners should be used only by a professional.
Most drain cleaners advise waiting 15 minutes or more after pouring the product into the drain before flushing it with hot water. If your drain is still clogged afterward, you may need to repeat the process.
Allow the sulfuric acid to set for 30 minutes. The acid should start to eat away at the clog, helping to dislodge it from the walls of the drain.
Hydrochloric acid, otherwise known as muriatic acid, is commonly used by plumbers around the world to clear a clogged rain. It is a strong acid that can cause serious injury if it is not used with care.
Oxidizers, acids, and caustics are examples of drain cleaners that can cause PVC pipes to melt or become soft. Sulfuric acid and hydrochloric acid are the active ingredients of acid cleaners.
Plumbers commonly use hydrochloric acid to unclog pipes. Sulfuric acid drain cleaner is an option to consider. Sodium hydroxide is another common drain cleaner.
It smells like rotten eggs, but Sulfur dioxide has a similar smell. Hydrogen sulfide in low concentrations isn't instantly deadly, but it can kill you slowly. In high concentrations one or two breaths of Hydrogen sulfide can be deadly.
Indefinite IF there is nothing for the sulfuric acid to react with — no impurities, nothing to react with in the container material, no contact with the atmosphere. Sulfuric acid is very stable — no internal reactions when there are no impurities.
Mix 1/3rd of a cup of bicarbonate of soda with 1/3rd of a cup of vinegar in a measuring cup. It will fizz immediately, and you should waste no time pouring it down the clogged drain. The fizzing action will help to remove the gunk, hair, and grime that has built up in the pipe.
Can acid damage PVC pipes?
PVC is resistant to many alcohols, fats, oils and aromatic free petrol. It is also resistant to most common corroding agents including inorganic acids, alkalis and salts. However, PVC should not be used with esters, ketones, ethers and aromatic or chlorinated hydrocarbons.
Pipe Damage
The hydrochloric acid can break down the coding in your pipes. Over time if you continue to use it, it can cause your pipes to corrode and holes to form. The damage from it can cost more than regular professional drain cleanings or DIY solutions.

For example, if you mix a drain cleaner with sulfuric acid and one with sodium hydroxide, you get an acid-base reaction, resulting in salt and water. Acid-base reactions are exothermic, giving off heat.
Just like the vinegar and the baking soda, when sulfuric acid is mixed with a base, the two will neutralize each other. This kind of reaction is called a neutralization reaction.
- Start by pouring a pot of boiling water down the drain.
- Next, pour a cup of baking soda and 1 cup water/1 cup vinegar solution.
- Cover with the drain plug and wait 5 to 10 minutes.
- Pour boiling water down the drain again.
Experts agree: Drano Max Gel is the best overall drain cleaner because it works quickly to get rid of tough clogs. This reliable and effective cleaner is a thick gel that goes deep in sinks, pipes, and drains to reach the source of the clog and completely dissolve it.
Acid Spills (hydrochloric or sulfuric acid):
Neutralize spill with sodium bicarbonate/baking soda 2.
The biggest sellers -- Liquid Plumr, Crystal Drano, Liquid Drano and Lewis Red Devil -- use lye. Another brand, The Works, is primarily hydrochloric acid. Two other products, Instant Power and Rooto Professional, are made from concentrated sulfuric acid.
It depends on the plastic. Because it is an ester, PET (polyethylene terephthalate) is easily hydrolysed by sulphuric acid. The hydrocarbon plastics such as polyethylene and polypropylene are unreactive to most acids and cold sulfuric is OK but hot acid is not recommended.
Sulfuric acid is a clear, colorless, odorless, oily liquid.
Is sulfuric acid fatal if inhaled?
Introduction. Sulfuric acid is a highly corrosive substance that can damage and destroy human tissues. Its vapor, however, is strongly irritant to the respiratory tract and can cause severe pulmonary edema which could prove fatal.
VERY TOXIC, can cause death. Can cause severe irritation of the nose and throat. Can cause life-threatening accumulation of fluid in the lungs (pulmonary edema). Symptoms may include coughing, shortness of breath, difficult breathing and tightness in the chest.
Sulfuric acid (H2S04) is a corrosive substance, destructive to the skin, eyes, teeth, and lungs. Severe exposure can result in death. Workers may be harmed from exposure to sulfuric acid.
From industrial-strength drain cleaners to detergents, sulfuric acid is very effective because of its corrosive property. It can effectively dissolve both organic and inorganic materials.
Sulfuric acid is a very strong acid; in aqueous solutions it ionizes completely to form hydronium ions (H3O+) and hydrogen sulfate ions (HSO4−). In dilute solutions the hydrogen sulfate ions also dissociate, forming more hydronium ions and sulfate ions (SO42−).
H2SO4(conc) is hygroscopic which absorbs water from the glucose.As a result,the paper turns into black.
Use a Natural Cleaner
Begin by pouring up to a whole box of baking soda down the drain, depending on the severity of the slime. Then pour in the vinegar, up to half a bottle. You should hear or see the fizzing. Let it react for about five minutes, then slowly pour the boiling water down the drain.
In some cases, drains can unblock themselves depending on the nature of the blockage. For example, if your drain has become blocked due to tree root ingress, it will not be able to unblock itself (and require an engineer to conduct a CCTV drain survey to assess the problem and identify a solution).
High Silicon—The high-silicon irons, such as Duriron and Corrosiron exhibit excellent resistance to all concentrations of sulfuric acid up to and including boiling temperatures. They are available in cast form only.
Hydrochloric acid, also known as muriatic acid, is the most common acid used by plumbers to unclog drains. Although this component can be found even in your own stomach, as part of the digestive acids, its pure concentrated form can only be purchased from certain stores if you carry a plumber's license.
What does acid do to pipes?
What does acidic water do to plumbing? Acidic water is extremely corrosive and destroys household plumbing. The corrosive properties of acid water dissolve the copper out of your pipes, leaving blue-green stains on your drains, in your bathtubs and sinks, and around your faucets.
Sulfuric acid is a recipe for disaster; it is corrosive to cast iron. Experts suggest checking the ingredients on household drain cleaners, as many brands contain sulfuric acid, which accelerates pipe corrosion.
Sulfuric Acid Potassium chlorate, potassium perchlorate, potassium permanganate (or such compounds with similar light metals, as sodium, lithium etc.)
Concentrated sulfuric acid has a strong affinity for water and will react violent and generate heat when coming into contact with water. Always add acid to the water when diluting sulfuric acid. A large amount of heat may be released, and could cause burns.
Reaction with water
The hydration reaction of sulfuric acid is highly exothermic. If water is added to concentrated sulfuric acid, it can boil and spit dangerously. One should always add the acid to the water rather than the water to the acid.
Sulfuric acid can be neutralized by combining it with a base like sodium bicarbonate. The two compounds, sodium bicarbonate and sulfuric acid, are industrially of major importance.
One of the recommended methods to neutralize sulfuric acid concentrations that are weak involves adding small amounts of sodium bicarbonate, more commonly known as baking soda, to the liquid and observing the results.
Reverse Sulfonation
Sulfur trioxide readily reacts with water to produce sulfuric acid and heat. Therefore, by adding heat to benzenesulfonic acid in diluted aqueous sulfuric acid the reaction is reversed.
Papillary dermis Damage induced by concentrated sulphuric acid appears within the first minute. Full skin lesions are observed after approximately 4 hours. No spontaneous healing of the H2SO4 burn was observed after 2, 6 and 11 days.
The strongest of them all
That title falls to fluoroantimonic acid – a superacid mixture of antimony pentafluoride and hydrofluoric acid.
What are the disadvantages of sulfuric acid?
Sulfuric acid is a corrosive chemical and can severely burn the skin and eyes. It may cause third degree burns and blindness on contact. Exposure to sulfuric acid mist can irritate the eyes, nose, throat and lungs, and at higher levels can cause a buildup of fluid in the lungs (pulmonary oedema).
Reaction with water
The hydration reaction of sulfuric acid is highly exothermic. If water is added to concentrated sulfuric acid, it can boil and spit dangerously. One should always add the acid to the water rather than the water to the acid.
Exposure to sulfuric acid may occur through skin contact, eye contact, ingestion, and breathing contaminated air. Sulfuric acid can cause severe skin burns, it can burn the eyes, burn holes in the stomach if swallowed, irritate the nose and throat, and cause difficulties breathing if inhaled.
Skin Exposure:
Flush skin contaminated with sulfuric acid with soap and lukewarm water for at least 30 minutes. Do not scrub or rub skin. If strong concentrations of gas or solution penetrate clothing, remove clothing and flush the skin with water.
Sulfuric acid is a very strong chemical that is corrosive. Corrosive means it can cause severe burns and tissue damage when it comes into contact with the skin or mucous membranes.
Sulfuric acid is a colorless oily liquid. It is soluble in water with release of heat. It is corrosive to metals and tissue. It will char wood and most other organic matter on contact, but is unlikely to cause a fire.
Sulfuric acid presents serious storage issues because it's a very heavy chemical, especially at high concentrations. At 93-98% concentration, it is nearly twice the weight of water. It's also an aggressive chemical that oxidizes plastic and corrodes metals.
Piranha solutions are a mixture of concentrated sulfuric acid with hydrogen peroxide, usually in a ratio of 3:1 to 7:1.
Sulphuric acid is called the king of acids.
The reaction of sulfuric acid and hydrogen peroxide produces an aqueous solution of peroxymonosulfuric acid (H2SO5): H2SO4 + H2O2 → H2SO5 + H2O. This is also known as “piranha solution” due to its corrosiveness: it rapidly destroys most organic materials.