Introduction: pH as a Critical Quality Factor

Proper pH control is essential to ensure quality, safety and the desired sensory characteristics of meat and dairy products. pH directly affects the performance of antimicrobial preservatives, the texture and water-holding capacity of processed meats, the stability of emulsions in dairy products, and the development of characteristic flavor and aroma.

Meatpacking plants and dairy plants that neglect pH control often run into problems such as preservatives that do not work properly (benzoate is ineffective at high pH), products with poor texture (emulsion breakdown, water loss), off-flavors, and nonconformities in quality parameters.

With 53 years of experience supplying chemical inputs to the food industry, Boreto & Cardoso® distributes food grade pH regulators (citric acid, sodium citrate and sodium bicarbonate), as well as USP liquid petrolatum (white mineral oil) for lubricating equipment in food contact areas, all sourced from certified suppliers under strict quality control.

Executive Summary

  • Essential pH regulators: citric acid, sodium citrate and sodium bicarbonate
  • Specific applications: emulsification, acidity control, water retention, antioxidant action
  • ANVISA (Brazil's National Health Surveillance Agency) compliance: permitted dosages and regulatory requirements
  • USP mineral oil: food grade lubrication for processing equipment
  • Practical checklist: implementing pH control in industrial processes

Contents

  1. Why pH is critical in processed foods
  2. Citric acid: natural acidulant and antioxidant
  3. Sodium citrate: emulsifier and pH regulator
  4. Sodium bicarbonate: neutralizer and acidity controller
  5. USP liquid petrolatum: food grade lubrication
  6. Ideal pH ranges by product type
  7. Interaction between pH and antimicrobial preservatives
  8. Frequently asked questions about pH regulators
  9. Implementation checklist: effective pH control
  10. Conclusion: pH as a pillar of quality

1. Why pH Is Critical in Processed Foods

Definition and pH Scale

pH (hydrogen ion potential) measures the acidity or alkalinity of a food on a scale from 0 to 14:

  • pH < 7: acidic
  • pH = 7: neutral
  • pH > 7: alkaline (basic)

Most processed foods fall within the pH 4.0 to 7.0 range, and small variations can have a significant impact on quality and safety.

Impact of pH on Microbiological Safety

Different microorganisms thrive in specific pH ranges:

Pathogenic bacteria:

  • Clostridium botulinum: pH > 4.6 (low-acid foods)
  • Salmonella: pH > 4.0
  • E. coli: pH 4.5 to 9.0 (wide range)

Molds and yeasts:

  • Grow over a wider pH range, including acidic environments (pH 3.0 to 8.0)

Foods with pH < 4.6 are considered high-acid and carry a lower risk from spore-forming pathogens.

Impact of pH on Preservative Performance

The antimicrobial activity of preservatives is highly pH-dependent:

Sodium benzoate:

  • Maximum effectiveness: pH < 4.5
  • Ineffective: pH > 5.5

Potassium sorbate:

  • Good effectiveness: pH < 6.5
  • Progressive loss above pH 6.5

Sodium nitrite:

  • Highest antimicrobial effectiveness: slightly acidic pH (5.5-6.5)

Impact of pH on Functional Properties

In meat products:

  • Water-holding capacity (WHC): highest at the isoelectric point of the proteins (pH ~5.0-5.5)
  • Texture and tenderness: pH affects protein bonds
  • Color: pH influences color stability in cured products

In dairy products:

  • Emulsion stability: the right pH prevents separation
  • Casein coagulation: pH close to 4.6 causes precipitation
  • Cheese texture: pH controls texture development

pH Control in Industrial Processes

pH regulators make it possible to:

  • Adjust acidity to the optimal range for preservatives
  • Improve functional properties (emulsification, water retention)
  • Standardize sensory characteristics from batch to batch
  • Meet product specifications (specified final pH)

2. Citric Acid: Natural Acidulant and Antioxidant

Technical Characteristics

Citric acid (C₆H₈O₇) is a tricarboxylic organic acid found naturally in citrus fruits. As a food additive (INS 330), it has several functions:

  • Acidulant: lowers pH in a controlled way
  • Antioxidant: inhibits fat oxidation and enzymatic browning
  • Chelating agent: sequesters metal ions
  • Flavor enhancer: brings out natural flavors
  • pKa: 3.13 / 4.76 / 6.40 (three carboxylic groups)

Applications in Meatpacking Plants

Processed meats:

  • Lowering pH to the optimal range for preservatives (pH 5.5-6.0)
  • Inhibiting lipid oxidation (preventing rancidity)
  • Preventing discoloration in fresh meat
  • Improving water retention in emulsified products

Cured products:

  • Boosting the action of nitrite
  • Stabilizing the characteristic pink color
  • Slightly tangy flavor in some products (fresh sausages)

Marinades:

  • Meat tenderization (mild proteolysis)
  • Flavor development
  • Complementary antimicrobial action

Applications in Dairy Plants

Processed cheeses:

  • Adjusting pH to the ideal melting range (pH 5.6-5.8)
  • Improving texture and creaminess
  • Preventing fat separation

Dairy beverages:

  • Controlled acidification
  • Protein stabilization
  • Characteristic flavor of fermented products

Yogurts and fermented products:

  • Final acidity adjustment
  • pH standardization between batches
  • Control of post-acidification

Dosages and ANVISA Compliance

Maximum limits:

  • Meat products: up to 0.5% (quantum satis according to GMP)
  • Dairy products: up to 1.0% depending on category

Dosage calculation: To lower the pH of a meat product from 6.5 to 5.8:

  • Typical dosage: 0.1-0.3% (1-3 g/kg)
  • Adjust according to the buffering capacity of the product
  • Small-scale trials recommended

Additional Functional Properties

Metal chelation:

  • Removes Fe²⁺ and Cu²⁺ ions that catalyze oxidation
  • Prevents discoloration and rancidity
  • Extends the shelf life of high-fat products

Synergy with preservatives:

  • Boosts the action of benzoate and sorbate
  • Reduces the preservative dosage needed
  • Mild antimicrobial effect of its own

Supply from Boreto & Cardoso®

Anhydrous or monohydrate citric acid, food grade, with:

  • Certificate of Analysis confirming purity
  • Safety Data Sheet (SDS)
  • Available in 25 kg packaging

3. Sodium Citrate: Emulsifier and pH Regulator

Technical Characteristics

Sodium citrate (Na₃C₆H₅O₇) is the sodium salt of citric acid, available in dihydrate or anhydrous form. As a food additive (INS 331), it has specific functions:

  • Emulsifier: stabilizes fat-in-water emulsions
  • pH regulator: keeps pH within the desired range (buffering effect)
  • Chelating agent: sequesters calcium, preventing precipitation
  • Emulsifying salt: in processed cheeses, promotes uniform melting
  • Solution pH: slightly alkaline (7.5-8.5 at 5%)

Applications in Meat Products

Emulsified sausages:

  • Stabilizing fat emulsions (frankfurters, mortadella)
  • Improving texture and binding
  • Increasing water-holding capacity
  • Reducing cooking losses

Restructured products:

  • Better binding between meat pieces
  • More uniform texture
  • Less purge in packages

Marinades and injection brines:

  • Higher yield (brine retention)
  • Juicier texture
  • pH standardization

Applications in Dairy Plants

Processed cheeses (main application):

  • Emulsifying salt: solubilizes casein, allowing uniform melting
  • Prevents fat separation during heating
  • Characteristic smooth, creamy texture
  • pH control for the ideal melting point

UHT milk:

  • Protein stabilization during heat treatment
  • Prevention of coagulation at high temperatures
  • Chelation of calcium that could precipitate

Infant dairy products:

  • Adjusting the mineral profile (lower free calcium)
  • Stabilizing complex formulations

Dosages and ANVISA Compliance

Maximum limits:

  • Meat products: up to 0.5% (5 g/kg)
  • Processed cheeses: up to 3.0% (30 g/kg)
  • UHT milk: up to 0.2% (2 g/kg)

Typical dosages:

Sausages:

  • 0.2-0.4% of the total batch weight
  • Add during chopping (bowl cutter) together with salt and ice

Processed cheeses:

  • 1.5-2.5% of the cheese weight
  • Combine with other emulsifying salts according to the formulation

Mode of Action in Cheese

Sodium citrate works as an emulsifying salt through:

  1. Calcium chelation: removes Ca²⁺ bound to casein
  2. Casein dispersion: the freed proteins emulsify the fat
  3. pH adjustment: a 5.6-5.8 range is ideal for melting
  4. Hydration: dispersed casein holds water and forms a gel

Interaction with Other Ingredients

With phosphates:

  • Synergistic emulsifying effect
  • Common combination: citrate + polyphosphate
  • Reduces the total dosage needed

With sodium chloride:

  • Higher ionic strength
  • Better protein solubilization
  • Flavor control (citrate tastes less salty than NaCl)

Supply from Boreto & Cardoso®

Sodium citrate dihydrate, food grade, with:

  • Certificate of Analysis
  • Safety Data Sheet (SDS)
  • 25 kg packaging

4. Sodium Bicarbonate: Neutralizer and Acidity Controller

Technical Characteristics

Sodium bicarbonate (NaHCO₃) is a sodium salt of carbonic acid. As a food additive (INS 500i), it has specific properties:

  • Alkalizing agent: raises pH in a controlled way
  • Buffer: resists pH changes
  • Leavening agent: releases CO₂ in the presence of acids
  • Neutralizer: reacts with acids, converting them into salts
  • Solution pH: 8.3 at 1%

Applications in Meat Processing

Pre-processing treatment:

  • Raising the pH of PSE meat (pH < 5.5) to the normal range (5.8-6.2)
  • Improving water-holding capacity in acidic meat
  • Higher yield in processed products

Neutralizing acidic marinades:

  • pH adjustment after overly acidic marinating
  • Fine control to reach the target pH

Emulsified products:

  • Adjusting pH to the optimal range for protein binding
  • Better texture in emulsions

Applications in Dairy Plants

Neutralizing lactic acid:

  • Controlling excessive acidification in fermented products
  • pH adjustment in acidic cheeses
  • Less post-acidification in yogurts

Whey treatment:

  • Neutralizing acid whey before concentration
  • Preventing protein precipitation during evaporation

Dairy products with bicarbonate:

  • Antacid milk of magnesia (combined with magnesium compounds)
  • Specific products with buffering properties

Dosages and ANVISA Compliance

Maximum limits:

  • Meat products: quantum satis according to GMP (typically < 0.5%)
  • Dairy products: quantum satis depending on category

Typical dosages:

PSE meat (low pH):

  • 0.1-0.3% of the meat weight
  • Apply in brine or by injection
  • Monitor final pH (target 5.8-6.0)

Acidity neutralization:

  • Stoichiometric calculation: 1 g of NaHCO₃ neutralizes ~0.73 g of citric acid
  • Adjust based on small-scale trials

Mode of Action

Reaction with acids: NaHCO₃ + H⁺ → Na⁺ + H₂O + CO₂

  • Neutralization of free protons
  • CO₂ release (may form bubbles in some products)
  • Formation of a neutral salt

Buffering effect:

  • The HCO₃⁻/CO₃²⁻ system resists pH changes
  • Keeps pH stable during processing and storage

Precautions in Use

Overdosing:

  • Excessively high pH (> 7.0) can cause an unpleasant alkaline taste
  • "Soapy" texture in meat
  • Abnormal color (darkening in some products)

CO₂ release:

  • Bubble formation in liquid or semi-solid products
  • May affect texture and appearance
  • Avoid in products that require a smooth texture

Interaction with preservatives:

  • High pH reduces the effectiveness of benzoate and sorbate
  • Use sparingly when preservatives are present

Combined Applications

Bicarbonate + Citric Acid:

  • Effective buffer system
  • Precise pH control within the desired range
  • Used in complex formulations

Supply from Boreto & Cardoso®

Food grade sodium bicarbonate, with:

  • Certificate of Analysis
  • Safety Data Sheet (SDS)
  • 25 kg packaging

5. USP Liquid Petrolatum: Food Grade Lubrication

Technical Characteristics

USP liquid petrolatum (white mineral oil) is a highly refined petroleum-derived hydrocarbon that meets United States Pharmacopeia (USP) specifications. Characteristics:

  • USP/Pharmaceutical grade: purity suitable for food contact
  • Colorless, odorless, tasteless: does not contaminate food
  • Chemically inert: does not react with food or equipment
  • Non-oxidizing: long-term stability
  • Viscosity: varies by application (light, medium, heavy)

Applications in Meatpacking and Dairy Plants

Equipment lubrication:

  • Valves in contact with food
  • Process pumps
  • Conveyor chains
  • Bearings on filling equipment

Care of forms and molds:

  • Release agent for molded meat products
  • Lubrication of cheese molds
  • Preventing sticking in packaging

Sealing and protection:

  • Sealing tank lids
  • Protecting threads and seals
  • Lubricating cutting equipment

Why USP Mineral Oil Is Required

Regulations:

  • Conventional lubricants are toxic and contaminate food
  • ANVISA and the FDA require food grade lubricants (H1) at points of potential contact
  • HACCP and GMP audits check for proper use

Food safety:

  • Accidental contact with food does not cause contamination
  • Does not alter the flavor, odor or appearance of products
  • Non-toxic even if ingested

Equipment protection:

  • Proper lubrication reduces wear and maintenance
  • Extends the service life of mechanical components
  • Prevents contamination from rust or oxidation

Differences Between Mineral Oil Grades

USP mineral oil (food grade):

  • Extensive refining that removes aromatics and impurities
  • USP or equivalent certification
  • Permitted for food contact

Technical/industrial mineral oil:

  • Basic refining
  • May contain toxic aromatics
  • NOT permitted in food processing

Specific Applications by Equipment

Valves and stopcocks:

  • Lubrication of seals and threads
  • Easier operation and no seizing
  • Maintains tightness

Centrifugal and lobe pumps:

  • Lubrication of mechanical seals (according to design)
  • Protection of shafts and rotating components

Conveyor chains:

  • Lubrication of pins and links
  • Less noise and wear
  • Applied by spray or automatic drip

Filling equipment:

  • Lubrication of pistons and plungers
  • Package closing components

Dosage and Application

Frequency:

  • As specified in the equipment manual
  • Typically: weekly for critical points, monthly for low-wear points

Quantity:

  • Minimum needed for proper lubrication
  • Excess can drip and contaminate products
  • Wipe off excess before returning to operation

Method:

  • Manual application as grease or oil
  • Automatic lubrication systems (more hygienic)
  • Record in maintenance logs

Compliance and Documentation

Required certification:

  • NSF H1 certificate (incidental food contact) or
  • USP/Pharmacopeia certification
  • Up-to-date SDS

Audits:

  • Evidence of food grade lubricant use
  • Maintenance records listing the products used
  • Separate storage for industrial lubricants

Supply from Boreto & Cardoso®

Food grade USP liquid petrolatum, with:

  • USP or NSF H1 certificate
  • Safety Data Sheet (SDS)
  • Packaging: 20L or 200L

6. Ideal pH Ranges by Product Type

Meat Products

Product Ideal pH Role of pH
Fresh beef 5.4-5.8 Sensory quality, WHC
Fresh pork 5.6-6.0 Avoiding PSE, good texture
Cured bacon 5.8-6.2 Nitrite effectiveness, stable color
Cooked ham 6.0-6.3 Protein binding, texture
Frankfurter 6.0-6.5 Emulsification, texture
Mortadella 6.0-6.5 Stable emulsion
Fresh sausage 5.6-6.0 Preservation, flavor
Salami 4.8-5.2 Fermentation, preservation
Marinated products 4.5-5.5 Tenderizing, preservation

Dairy Products

Product Ideal pH Role of pH
Fresh milk 6.6-6.8 Natural stability
UHT milk 6.6-6.8 Preventing heat coagulation
Plain yogurt 4.0-4.5 Lactic fermentation, texture
Minas frescal cheese (Brazilian fresh cheese) 6.0-6.5 Soft texture, freshness
Processed cheese 5.6-5.8 Uniform melting
Requeijão (Brazilian spreadable cream cheese) 5.8-6.2 Creaminess, stability
Fermented dairy beverage 4.2-4.6 Preservation, tangy flavor
Butter 6.4-6.8 Stability, flavor
Cream 6.5-6.8 Emulsion stability

Recommended Adjustments

To lower pH (acidify):

  • Add citric acid (0.05-0.3%)
  • Start with a low dosage and adjust as needed

To raise pH (alkalize):

  • Add sodium bicarbonate (0.05-0.2%)
  • Caution: excess causes an alkaline taste

To buffer pH (stabilize):

  • Use sodium citrate (0.1-0.5%)
  • Citric acid + sodium citrate buffer system

7. Interaction Between pH and Antimicrobial Preservatives

Preservative Effectiveness vs pH

Undissociated organic acids: The undissociated (molecular) form of organic acids is the antimicrobial one. The share of the undissociated form depends on pH:

Benzoate (pKa = 4.2):

  • pH 3.0: 99% undissociated (maximum effectiveness)
  • pH 4.2: 50% undissociated
  • pH 5.2: 10% undissociated
  • pH 6.2: 1% undissociated (ineffective)

Sorbate (pKa = 4.8):

  • pH 3.8: 90% undissociated
  • pH 4.8: 50% undissociated
  • pH 5.8: 10% undissociated
  • pH 6.8: 1% undissociated

Optimization Strategies

Product with naturally high pH (> 6.0):

  • Lower pH to 5.5-6.0 with citric acid
  • Use potassium sorbate (still effective up to pH 6.5)
  • Avoid benzoate (ineffective above pH 5.5)

Product with naturally low pH (< 5.0):

  • Benzoate is highly effective
  • Lower dosage thanks to high effectiveness
  • Sorbate is also effective as an alternative

Product with neutral pH (6.5-7.0):

  • Acid preservatives are ineffective
  • Reliance on nitrite/nitrate (meat products)
  • Strict temperature and hygiene control

Practical Example: Optimizing a Fresh Sausage

Starting point:

  • Natural pH of the meat batter: 6.2
  • Preservative: sodium benzoate 0.1%
  • Problem: short shelf life (spoilage within 3-4 days under refrigeration)

Analysis:

  • At pH 6.2, benzoate is practically ineffective (< 2% in the active form)
  • The preservative is not working

Solution:

Option 1 - Lower the pH:

  • Add 0.15% citric acid
  • Final pH: 5.8
  • Benzoate now has ~5% in the active form (still low)
  • Result: moderate improvement (6-7 days)

Option 2 - Change the preservative:

  • Keep pH at 6.2
  • Replace benzoate with 0.15% sorbate
  • Sorbate is effective up to pH 6.5
  • Result: good protection (8-10 days)

Option 3 - Combine strategies (best result):

  • Add 0.1% citric acid (final pH 5.9)
  • Use 0.1% sorbate
  • Synergy: lower pH + the right preservative
  • Result: optimal shelf life (12-14 days)

Decision Table: pH vs Preservative

Product pH Recommended Preservative Typical Dosage Notes
\< 4.5 Sodium benzoate 0.05-0.1% Maximum effectiveness
4.5-5.5 Benzoate or sorbate 0.1-0.15% Both effective
5.5-6.5 Potassium sorbate 0.15-0.2% Benzoate ineffective
\> 6.5 Nitrite/nitrate (meat products) As permitted by law Organic acids ineffective

8. Frequently Asked Questions About pH Regulators

1. What is the difference between citric acid and sodium citrate?

Citric acid lowers pH (acidifies) and has antioxidant action. Sodium citrate keeps pH stable (buffer) and acts as an emulsifier. In processed cheeses, citrate is essential as an emulsifying salt. For products that need acidity, citric acid is the choice. The two can be combined to create a buffer system that resists pH changes.

2. Can I use bicarbonate to raise the pH of very acidic products?

Yes, sodium bicarbonate neutralizes acidity and raises pH. Typical dosage: 0.1-0.3% as needed. Precautions: excess causes an unpleasant alkaline taste and can release CO₂, forming bubbles. Run small-scale trials before industrial use. Monitor final pH so it does not exceed 6.5-7.0.

3. Why do preservatives stop working when pH is high?

Preservatives such as benzoate and sorbate are organic acids that only work in their undissociated (molecular) form. At high pH, these acids dissociate completely into ions and lose their antimicrobial activity. For example, at pH 6.0 less than 2% of benzoate is in the active form, which makes it practically ineffective. Lowering pH to 5.5 or below restores effectiveness.

4. Is USP mineral oil really safe for food use?

Yes. USP liquid petrolatum (white mineral oil) is a highly refined hydrocarbon that meets the United States Pharmacopeia, is non-toxic and is approved for incidental food contact. Unlike industrial mineral oils, which contain toxic aromatics, USP mineral oil is purified to remove impurities. Because of its safety it is also used in pharmaceutical and cosmetic products.

5. How do I calculate how much citric acid to use to reach a specific pH?

An exact calculation has to take the buffering capacity of the product into account. As an initial estimate for meat products:

  • To lower pH by 0.5 units: ~0.1-0.15% citric acid
  • To lower pH by 1.0 unit: ~0.2-0.3% citric acid

Recommendation: run small-scale trials (100-500g), measure pH with a calibrated pH meter, and extrapolate to industrial production. Dairy products have higher buffering capacity and require higher dosages.

6. Can sodium citrate replace phosphates in meat products?

Partially. Citrate acts as an emulsifier and increases water retention, much like phosphates, but through different mechanisms. Phosphates are more powerful at solubilizing proteins. Citrate has the advantage of being perceived as "natural" (citric acid in salt form). In some formulations, combining citrate with phosphates lowers the total dosage. A pilot plant trial is recommended before full replacement.

9. Implementation Checklist: Effective pH Control

Step 1: Initial Assessment

☐ Measure current pH of all products at different points in the process ☐ Identify products whose pH is unsuitable for the preservatives in use ☐ Assess pH-related problems (texture, preservation, flavor) ☐ Set a target pH for each product based on the reference tables

Step 2: Selecting Regulators

☐ Citric acid to lower pH and add antioxidant action ☐ Sodium citrate for emulsification and buffering ☐ Sodium bicarbonate to raise pH when needed ☐ USP mineral oil for equipment lubrication ☐ Check food grade certifications and SDSs for all products

Step 3: Small-Scale Trials

☐ Prepare samples of 500g-1kg with different dosages ☐ Measure pH after adding regulators (calibrated pH meter) ☐ Evaluate texture and sensory characteristics ☐ Test preservation (shelf life at storage temperature) ☐ Document results and define the optimal formulation

Step 4: Industrial Implementation

☐ Calibrate dosing equipment for the regulators ☐ Train operators on proper addition and mixing ☐ Establish SOPs with dosages and addition points ☐ Implement pH control at critical process points

Step 5: Monitoring and Control

☐ Measure pH of every batch produced (log in a spreadsheet) ☐ Verify preservative effectiveness through microbiological testing ☐ Monitor sensory characteristics and complaints ☐ Adjust the formulation to account for raw material variations

Step 6: Compliance and Documentation

☐ Keep pH records per batch for audits ☐ File certificates for the regulators used ☐ Document adjustments and technical justifications ☐ Review procedures periodically for optimization

10. Conclusion: pH as a Pillar of Quality

Proper pH control in meat and dairy products is essential to ensure microbiological safety, preservative effectiveness, the desired functional properties and consistent sensory characteristics. Correct use of pH regulators (citric acid, sodium citrate and sodium bicarbonate), combined with proper equipment lubrication using USP mineral oil, makes up a set of essential tools for optimizing industrial processes.

The Boreto & Cardoso® Experience

With 53 years supplying chemical inputs to the food industry, Boreto & Cardoso® distributes pH regulators and processing aids from certified suppliers. Every product comes with its Certificate of Analysis. We also provide the Safety Data Sheet (SDS) and other documents required by legal and quality regulations.

Our ISO 9001 certification and long-standing relationships with renowned manufacturers ensure consistent and reliable supply of food grade products.

Contact Us

For more information on pH regulators and USP mineral oil, to request technical data sheets or to ask questions about acidity control in specific products:

Phone: +55 11 3931-1722 / +55 11 2366-6260

E-mail: boreto@boreto.com.br

Address: Rua Alagoas, 30 | Recanto Silvestre | Santana de Parnaíba - SP | CEP 06530-245

Website: www.boreto.com.br

About Boreto & Cardoso® Industrial chemical inputs distributor since 1972

Boreto & Cardoso® is a distributor specializing in chemical inputs for industrial sectors in general. We work exclusively with certified suppliers, ensuring quality products with complete technical documentation.

Certification: ISO 9001 - Quality Management

Contact: www.boreto.com.br | boreto@boreto.com.br | +55 11 3931-1722

Note to the reader
This article brings together technical information drawn from various sources, with the aim of broadening knowledge about the raw materials mentioned.
It is for information only and does not constitute, on the part of Boreto & Cardoso, any indication of application, formulation or direct recommendation of use.
Boreto & Cardoso®, with 53 years of experience, operates strictly as a supplier of chemical inputs for a wide range of applications, and each user is responsible for verifying the suitability and compliance of their own application.