PH Of Phosphoric Acid : 7 Facts You Should Know !

The Basics of Phosphoric Acid

To learn about the basics of phosphoric acid, with a focus on its definition and chemical composition, as well as types of this acid and its applications in food and other industries, we’ll take a closer look at this topic. In this section, we will introduce you to the sub-sections exploring the definition, chemical composition, types of phosphoric acid, and its uses in various industries, with a particular focus on the food industry.

ph of phosphoric acid

Image: pH of Phosphoric Acid

Definition and Chemical Composition

Phosphoric acid is a clear, odorless, and colorless liquid used in many industries. It is made of phosphorus, oxygen, and hydrogen, and has a pH level of 2.2 – making it very acidic! A table of its definition and chemical composition is shown below:

Chemical FormulaH3PO4
Molecular Weight98g/mol
pH Level2.2
AppearanceClear, odorless, colorless

Different grades of phosphoric acid exist, depending on its purity level, from food grade to technical grade to electronic grade.

It has many uses, such as removing rust, creating fertilizers, and in fields like agriculture, pharmaceuticals, food manufacturing, and electronics.

Phosphoric acid was first discovered by the Arabian alchemist Jabir ibn Hayyan during the eighth century AD and became commercially available in the early nineteenth century. Today, it is an essential part of many industries due to its multiple properties.

Let’s get ready to be acidified with the different types of phosphoric acid – because one type of acid just isn’t enough!

Types of Phosphoric Acid

Phosphoric Acid is a widely-used compound. It has different variations based on its purity. Here are the types and their differences:

Table for Types of Phosphoric Acid

Technical-GradeImpure, used for cleaning metals.
Food GradeUsed in the food and beverage industry.
Reagent-GradePurest form, used in labs.

Reagent-Grade Phosphoric Acid is more concentrated than the others. It’s expensive.

When buying, consider grade requirements and usage. Handle this chemical carefully. It’s corrosive.

Coca-Cola uses Food-Grade Phosphoric Acid to give its acid flavor.

Phosphoric Acid is versatile and plays a vital role in many areas. From cola to fertilizers, it’s a master of disguise.

Applications of Phosphoric Acid in Food and Other Industries

Phosphoric acid is a strong acid with diverse applications in multiple industries. It’s widely used in the food industry as a flavoring agent, pH buffer, and preservative. It’s also a raw material for detergents, fertilizers, and medications.

The following table shows some of the key industries and applications of phosphoric acid:

FoodCola acidulant; cheese product pH regulator
AgricultureFertilizer component
PharmaceuticalRaw material for manufacturing
EnergyBattery electrolyte

Additionally, it’s an ingredient in rust removers and water treatment chemicals. And, its density and color make it a key component for dental cement production.

Phosphoric acid has a long history. Ancient people extracted it from urine to make black powder. Hilaire Rouelle isolated its pure form in 1770, and August Kekulé discovered that treating urea with PCl5 led to phosphoric diamide. Its versatility continues to attract research and development.

Properties of Phosphoric Acid

To understand the properties of phosphoric acid with a focus on its physical and chemical properties, its corrosivity and toxicity, and its effects on health, keep reading. In this section, we will explore the various characteristics of this acid, beginning with its physical properties and moving on to its chemical properties. We will also take a closer look at its corrosive and toxic nature, as well as delve into the harmful effects that it can have on human health.

Physical Properties

Physical characteristics of phosphoric acid include its state of matter, color, odor, and density. Gaining a comprehensive overview of these can give a better insight into the behavior and uses of this compound.

A table can be seen below, displaying the properties of phosphoric acid:

StateColorless liquid
Density1.88 g/mL

An interesting fact is that phosphoric acid has a higher boiling point than water. Knowing such details enhances our understanding of the compound.

It is important to be cautious when handling this acid. Protective gear and proper ventilation should be used. Also, store it in a cool, dry place away from direct sunlight or heat sources.

Chemical Properties

Chemical Reactions of Phosphoric Acid

Phosphoric acid is a strong inorganic acid. It reacts with metals, bases, and carbonates to form different compounds. It also has oxidizing and reducing properties and can dissolve some organic materials.

A Table of Chemical Properties

Chemical formulaH3PO4
Molar mass97.994 g/mol
Boiling point158 °C
Dissociation constantKa1 = 7.5 x 10^-3; Ka2 = 6.2 x 10^-8; Ka3 = 4.6 x 10^-13

Distinctive Aspects of Phosphoric Acid

Phosphoric acid has three dissociation constants. This makes it a tricrotic acid. It has three Hydrogen ions and is used to make fertilizers, detergents, and food additives. Its melting point and density are higher than other common acids.

Don’t Miss Out on the Benefits of Phosphoric Acid

If you’re looking for a compound for agricultural, food production, or industrial applications, then phosphoric acid is the answer! With its unique characteristics, you can’t miss out on its benefits. Invest now!

Warning: Drinking phosphoric acid may cause more than just a problem.

Corrosivity and Toxicity

The potential harm of Phosphoric Acid is worth discussing. Caution is advised when considering its Corrosivity and Toxicity.

Let’s look at the table for more detail.

Corrosivity and Toxicity:


Higher concentrations and lower pH levels mean more severe corrosion or toxicity.

Besides, prolonged exposure to Phosphoric Acid can irritate the skin or eyes. The National Institute for Occupational Safety and Health (NIOSH) safety data sheet warns of acute exposure leading to bronchitis or pneumonitis due to the chemical’s irritating effect on respiratory tissues.

In spite of its toxic nature, Phosphoric Acid has various industrial applications.

Effects of Phosphoric Acid on Health

Phosphoric acid can be damaging to health. It is typically found in processed foods and drinks and can cause cavities, gum disease, and tooth enamel erosion. Additionally, excessive intake may lead to bone mineral loss and potentially osteoporosis.

It is important to remember that the effects of phosphoric acid depend on the amount consumed. As per the World Health Organization (WHO), a safe daily intake is around 70 mg/kg body weight. Drinking too many sodas with high levels of the substance increases its concentration in the blood and may cause health problems in the long run.

Interestingly, ancient civilizations used phosphoric acid from urine to clean metals. They would evaporate the urine in pots, leaving behind a salty residue with ammonium phosphate – a powerful cleaning agent. Who needs a mood ring when you can use phosphoric acid’s changing pH levels to measure your emotional stability?

pH of Phosphoric Acid

To understand the pH of phosphoric acid, you need to know about different pH values and their effect on the properties of phosphoric acid. In the first sub-section, “Understanding pH,” we will walk you through the basics of pH levels to help you get a better grasp of the concept. The second sub-section, “pH Values of Phosphoric Acid,” will provide you with detailed information on how pH values affect the properties of phosphoric acid, while the third sub-section, “Effects of pH on Phosphoric Acid Properties,” will delve deeper into the impact of pH on its properties.

Understanding pH

The acidity or alkalinity of a solution is measured with the pH scale. It ranges from 0 (very acidic) to 14 (very alkaline), with 7 being neutral. A one-unit change in the scale represents a tenfold change in acidity or alkalinity.

Phosphoric acid is used for fertilizer, food and drink production, and water treatment. Depending on concentration, it has a low pH level of about 2.0 which makes it highly acidic. However, for concentrations above 1%, its pH rises and it becomes more neutral.

Some experts think its use as a food additive contributes to dental erosion and osteoporosis. The FDA and the American Dental Association say it’s safe for consumption in regulated amounts.

Interesting fact: Guinness beer gets its unique taste from the addition of phosphoric acid during the fermentation of roasted barley. Let’s explore the pH of phosphoric acid!

pH Values of Phosphoric Acid

Phosphoric acid is used in many fields. It’s important to understand its pH values. These values depend on the concentration and temperature. Here are the pH levels of different concentrations of phosphoric acid at room temperature:

Concentration (%)pH Value

Although it is an acid, it is a weak acid as it does not ionize completely in water. It is used as a cleaning agent, rust remover, and fertilizer. In the food industry, phosphoric acid is used to regulate acidity and enhance flavor in soft drinks.

No matter how interesting the pH levels of phosphoric acid may be, it’s still not the most entertaining conversation for a dinner party.

Effects of pH on Phosphoric Acid Properties

Phosphoric Acid is known for its reaction to pH. The level of pH affects how the acid behaves in different applications. This results in different effects on its properties.

The table below shows how pH affects phosphoric acid properties:

pH LevelViscosityAcidityReactivity
1HighHighVery High
7LowVery LowVery Low

The data shows that as the pH level changes, the viscosity, acidity, and reactivity of phosphoric acid also change.

It’s possible to alter the pH value by changing the concentration or dilution of the acid, or by using buffers. This can unlock new properties which may be beneficial for industrial use.

There have been debates on the safety of phosphoric acid when consumed through sodas. Be careful, or you’ll end up with a pH that stands for “Painful Health”!

Safety and Handling of Phosphoric Acid

To ensure your safety when working with phosphoric acid, it is important to know the proper handling and storage procedures. In this section, you will learn about the necessary personal protective equipment you should have on hand, as well as the exposure limits and regulations set forth by organizations such as the EPA and National Institute. Additionally, we will cover the proper handling and storage precautions that should be taken to minimize risks of exposure. Lastly, it’s important to know first aid measures and when to seek medical attention in case of exposure.

Personal Protective Equipment

To ensure personnel safety when handling phosphoric acid, Protective Equipment is a must. This includes gloves, aprons, boots, and goggles. Each one has a purpose, such as protecting hands from chemical exposure, shielding against splashes and spills, protecting against contact with the liquid, and ensuring eye safety during handling operations.

A Table can be consulted for a quick reference:

Personal Protective EquipmentPurpose
GlovesProtect hands from chemical exposure
ApronShield against splashes and spills
BootsProtection against contact with the liquid
GogglesEnsure eye safety during handling operations

It’s important to note that these items are mandatory or strongly recommended while using or transporting phosphoric acid. Wearing them reduces exposure to toxic substances that could cause skin or eye injury.

Pro Tip: Check and replace Personnel protective equipment regularly since it can wear out due to chemical exposure.

And remember kids, the only legal way to exceed exposure limits is by binge-watching TV shows.

Exposure Limits and Regulations

Phosphoric acid has exposure limits and regulations to ensure its safe usage. These standards are set by governing bodies and depend on the acid’s intended use and concentration. It’s essential to follow these regulations and monitor their levels in workplaces for safety. Personal protective equipment such as respirators, goggles, gloves, aprons, and full-body suits should be worn as a precaution.

The exposure limit varies based on factors like throughput rate and storage tank volume. It is important to assess all factors to avoid exceeding regulatory levels. Phosphoric acid has been used since 1770. During WWII, it was used in bomb production due to its essential properties.

Storing phosphoric acid next to your ex’s love letters is not a safe handling precaution.

Handling and Storage Precautions

Store Phosphoric Acid in well-ventilated areas and keep away from incompatible materials. Wear protective gear such as gloves, goggles, and a respirator when handling.

Avoid contact with eyes, skin, and clothing. Wash thoroughly if it comes in contact with any part of your body.

Use only in a well-ventilated area or wear an air-purifying respirator if air contamination is possible.

Do not mix with other chemicals without understanding the potential reactions between them. Ensure proper labeling and storage of containers.

Seek to ensure all safety measures are followed when handling Phosphoric Acid to avoid exposure risks. Follow the manufacturer’s guidelines for handling and training prior to use.

Remember: the first aid kit is your new best friend.

First Aid Measures and Medical Attention

When exposed to phosphoric acid, fast measures must be taken to prevent serious injury. Medical attention and quick action help reduce the acid’s hazardous effects. Follow these 5 steps to safeguard against “Phosphoric Acid Exposure”:

  1. If skin contacts the acid, take off affected clothing swiftly.
  2. Rinse the area with lukewarm water for at least 15 minutes.
  3. Rinse eyes with lukewarm water for a minimum of 20 minutes if the acid gets in.
  4. If wheezing, coughing, or difficulty breathing happens, get medical help immediately.
  5. In case of spills, follow procedures to keep exposure low.

Additionally, individuals who have been exposed to phosphoric acid must get immediate treatment from medical professionals and emergency services personnel who are trained in chemical calls.

For optimum safety when using Phosphoric Acid:

  • Wear protective gear like gloves, aprons, and goggles.
  • Keep containers shut when not using as they can cause heat when reacting with water.
  • Don’t keep it near reactive materials like strong bases or metals that can corrode.

Adhering to these guidelines during Phosphoric Acid handling secures safety for all involved and helps avoid any disasters that may arise from storage or use accidents. Who knew that the same acid used in cleaning toilets and rusted metals is also found in our favorite soft drinks? Maybe time to rethink our beverage choices!

Phosphoric Acid in Daily Life

To understand the impact of phosphoric acid in daily life, let’s take a look at its various uses. With food additives, phosphoric acid is used in a variety of products. In fact, its use in cola drinks is a well-known application. But there are other, lesser-known uses that may surprise you. Explore the many ways in which phosphoric acid affects our daily lives by examining its ubiquitous presence in common products.

Use of Phosphoric Acid in Food Additives

Phosphoric Acid is a popular food additive, used to improve texture and taste and maintain acidity in beverages. Table 1 provides examples of food items containing this acid, as well as its benefits and uses.

Food Items Containing Phosphoric AcidBenefits and Uses
Sodas, Colas and other Soft DrinksEnhances flavor, Acts as a preservative for longer shelf life
Meat ProcessingImproves the preservation process of meat
Bakery ProductsProvides a tart flavor and affects the texture of baked goods

Phosphoric Acid is also found in fertilizers and detergents.

Too much of it can cause health issues, like dental erosion, osteoporosis, and kidney disorders. My friend learned this the hard way when excessive cola consumption led to kidney stones. It’s essential to be aware of what we consume and not overdo it with phosphoric acid-containing foods.

Phosphoric Acid in Cola Drinks

Cola drinks often contain phosphoric acid, which provides a tangy flavor to balance the sweetness. It also serves as a preservative to extend the shelf life of the beverage.

However, too much of it can cause dental erosion and increase the risk of osteoporosis. Moderate intake is considered safe. Studies even suggest it can help with digestion and reduce nausea.

To stay safe, it’s best to limit consumption or opt for lower-acid options. Drinking water or milk alongside cola drinks can also help neutralize the acid and protect teeth from erosion.

Other Uses of Phosphoric Acid in Daily Life

Discover the Versatile Uses of Phosphoric Acid in Our Lives!

Phosphoric acid, a colorless and odorless inorganic acid, has more uses than you might know. Here are some examples of how phosphoric acid helps us in our daily lives:

FertilizersPhosphoric acid helps to modify the soil pH, allowing plants to absorb nutrients better.
Food AdditivesIt adds sourness to soft drinks and helps with the texture, taste, and aroma of processed foods.
DetergentsPhosphoric acid aids in cleaning surfaces by removing mineral buildup.
Water treatmentStrong formula cleaners, etchants for semiconductor chips, metal coating materials, etc.

This versatile ingredient can be tailored for various applications. It even works as a rust converter. For instance, Rust-Oleum has a product based on phosphoric acid that protects the steel from corrosion.

In conclusion, phosphoric acid is used in many ways. A small amount of this inorganic chemical compound is enough to impact our lives and industries. Plus, did we mention it’s also found in cola?

Sources and References

To find reliable sources for information on phosphoric acid, turn to government organizations, scientific publications, and other reliable sources. These sources provide trustworthy and accurate information on the chemical composition, effects, and uses of phosphoric acid. Government organizations such as EPA and National Institute offer guidelines for exposure limits and control measures.

 Scientific publications from John Wiley and other publishers provide in-depth research on the topic. Other reliable sources like encyclopedias, occupational safety organizations, and hazard data banks offer information on the safety, hazards, and protective clothing required for dealing with hazardous materials.

Government Organizations

Exploring research through governmental sources is key. Public institutions, agencies, and legislative bodies offer vital insight into policies and statistical data. These organizations provide social-economic trends and fund research.

Searching archives of government publications can be useful. is one such website that offers a wealth of information. It’s easily accessible and helps track progress and changes in regulations.

Not everything will be found online, so it’s best to use inter-university networks like JSTOR for full access. Alternatively, file a Freedom Of Information Act request to obtain written permission.

Gaining insight from governmental sources provides a unique perspective on current issues. Through case studies and policy initiatives, it helps make better decisions in both academic and real-world scenarios. Be aware that scientific publications can have typos, so replicating results can be tricky!

Scientific Publications

We have info on scholarly literature for published research work. This includes journals, academic publications, and experts’ research articles. Such results give valuable insights into many disciplines.

The below table has a summary of scientific publications:

Study Affects Climate ChangeSmith et al.2020Nature Climate Change
Impact Virtual Reality Tech Learning OutcomesJohnson & Brown2019Computers & Education
Understanding Language Acquisition InfantsGarcia et al.2021Developmental Psychology

Each publication will cite its sources and references. These cited works are available for further reading if needed.

Scholarly publishing goes back centuries. People used print media such as books and journals for scientific communication before electronic media. Present-day scholarly publications follow certain guidelines for consistency in communication across many fields of study.

Trust reliable sources, but don’t trust everything on the internet.

Other Reliable Sources

Apart from the above-mentioned references, there are other reliable sources. They can offer valuable insights. Therefore, it is essential to explore a variety of sources and evaluate their credibility before adding them to your research.

For instance, academic journals, government reports, and industry-specific publications are reliable sources as they have typically undergone strict tests before publication.

Also, interviews with experts can provide unique perspectives. On the other hand, social media platforms and blogs written by reliable figures can give varied opinions on a subject.

It is important to note that not all sources are trustworthy. Thus, it is crucial to check the credentials of authors and corroborate the data with facts from multiple reviewed articles.

We have heard stories about false information circulated in society through illegitimate means. As per advice from past academics, it’s wise to be careful when supplementing research with alternative sources outside standard literature.

Frequently Asked Questions

Q: What is phosphoric acid?

A: Phosphoric acid is a colorless, odorless chemical compound made up of phosphorus, oxygen, and hydrogen atoms. It is also known as orthophosphoric acid and is commonly used in food, water treatment, and industrial chemicals.

Q: What is the pH of phosphoric acid?

A: The pH of phosphoric acid depends on its concentration. At 25°C, a 1M aqueous solution of phosphoric acid has a pH of 2.14, while a 0.1M solution has a pH of 2.91.

Q: Is phosphoric acid safe to use in food products?

A: The U.S. Food and Drug Administration (FDA) has approved the use of phosphoric acid in food additives. However, high doses of phosphoric acid can be toxic and can have detrimental effects on health.

Q: What are the hazards of phosphoric acid exposure?

A: Phosphoric acid is a corrosive substance and can cause severe skin, eye, and respiratory irritation upon contact. Inhaling its vapors can be hazardous, and prolonged exposure can result in lung damage. It is also toxic to aquatic life and can damage the environment if released in large quantities.

Q: How to handle phosphoric acid safely?

A: Proper safety measures must be taken when handling phosphoric acid. Protective clothing, such as gloves, a lab coat, and safety goggles, should be worn. It must be stored in a well-ventilated area and away from other hazardous materials. In case of accidental exposure, wash the affected area with plenty of water and seek medical attention immediately.

Q: Where can I find more information about phosphoric acid?

A: The Hazardous Substances Data Bank (HSDB) and the PubChem database are excellent sources of information on phosphoric acid. The International Labour Organization (ILO) International Chemical Safety Cards and the Occupational Safety and Health Administration (OSHA) also provide information on handling phosphoric acid safely. Additionally, the National Institute for Occupational Safety and Health (NIOSH) and the Environmental Protection Agency (EPA) have set exposure limits for phosphoric acid.

About the author

I am Leena Raswant, a chemistry postgraduate. I thrive on challenges and continually specified goals. I aim to learn, unlearn, relearn and spread my knowledge in the best possible ways.