What Is Magnesium Citrate? Everything You Need to Know Before Bulk Purchasing

Magnesium citrate is one of the most commonly used magnesium ingredients in dietary supplements, functional foods, and pharmaceuticals. It combines magnesium with citric acid to form an organic magnesium salt with excellent solubility and bioavailability. As global demand for magnesium supplements continues to grow, more brands and distributors are looking for reliable bulk magnesium citrate suppliers.

If you plan to source magnesium citrate in large quantities, understanding its production, quality standards, and supplier qualifications is essential. This guide explains everything you need to know before making a bulk purchasing decision.

What Is Magnesium Citrate?

Magnesium citrate is a magnesium salt formed by reacting magnesium compounds with citric acid. It typically appears as a white crystalline powder with good water solubility. Because it dissolves easily, the body can absorb magnesium efficiently.

Magnesium plays a role in more than 300 enzymatic reactions. It supports normal muscle function, nerve signaling, energy production, and bone health. Magnesium citrate is often selected because it offers better absorption than many inorganic magnesium salts.

How Is Magnesium Citrate Manufactured?

Magnesium citrate manufacturers usually produce magnesium citrate through a controlled neutralization reaction between citric acid and a magnesium source, such as magnesium oxide or magnesium carbonate.

What Are the Key Benefits of Magnesium Citrate?

Magnesium citrate offers several advantages for supplement manufacturers and consumers.

High bioavailability

Its excellent solubility helps improve magnesium absorption compared with many inorganic forms.

Good formulation flexibility

The powder blends well into capsules, tablets, stick packs, and powdered drink mixes.

Excellent water solubility

Its fast dissolution makes it suitable for beverage applications and instant nutritional products.

Widely recognized ingredient

Magnesium citrate has a long history of use in dietary supplements worldwide and is accepted in many international markets.

These benefits make it a preferred choice for premium magnesium formulations.

Common Applications of Magnesium Citrate Across Industries

1. Dietary supplements

Manufacturers use it in capsules, tablets, gummies, and powdered supplements designed to support daily magnesium intake.

 2. Functional foods and beverages

It is commonly added to meal replacements, electrolyte drinks, nutrition powders, and fortified beverages.

3. Pharmaceutical industry

Magnesium citrate appears in selected pharmaceutical formulations under applicable regulatory requirements.

4. Sports nutrition

Sports nutrition brands include magnesium citrate in hydration and recovery products that support active lifestyles.

Maxmedchem’s Magnesium Citrate Specifications

Maxmedchem supplies high-purity magnesium citrate powder manufactured under strict quality management systems. Every batch undergoes comprehensive testing to ensure consistent performance.

Specification of Our Anhydrous Magnesium Citrate

Product Characteristic
Product Name	Anhydrous Magnesium Citrate
CAS	3344-18-1
Structural Formula
Molecular Formula	Mg3(C6H5O7)2
Molecular Weight	451.1
Raw Material	Citric acid and magnesium salt
Manufacturing Process	Processed through procedures including feeding, neutralization, pressure filtration, vacuum drying, pulverization, sieving, metal detection, and packaging.
Unit Size	25 kg/carton
Shelf Life	36 months
Storage Conditions	Sealed, store in a cool and dry place

 

Sensory Indexes
Color	white
Characteristics	Powder, no visible impurities
Taste&Odor	Characteristic taste and odor, no unpleasant odor

 

Identification
Items	Index	According to
Chemical Identification Tests	Consistent with characteristic	USP 42 <191>

 

Chemical Analysis
Items	Index	According to
Particle Size	Passing through 120 mesh < 50 %, and passing through 80 mesh ≥ 50 %	USP 42 <786>
Moisture                    %	≤ 2.0	USP 42 <731>
pH	5.0-9.0	USP 42 <791>
Chloride                    %	≤ 0.05	USP 42 <221>
Sulfate                     %	≤ 0.2	USP 42 <221>
Magnesium（Mg）            %	14.5-16.4	USP 42 <191>

 

Heavy Metals
Items	Index	According to
Arsenic（As）             mg/kg	≤ 3.0	USP 42 <211>
Iron（Fe）               mg/kg	≤ 200.0	USP 42 <241>
Calcium （Ca）           mg/kg	≤ 1.0	USP 42 <852>

 

Microorganism
Items	Index	According to
Aerobic Plate Count       CFU/g	≤ 1000	USP 42 <2023>
Mould and Yeast          CFU/g	≤ 100	USP 42 <2023>
E.Coil                    /10g	Negative	USP 42 <2023>
Salmonella                /10g	Negative	USP 42 <2023>

Key Factors to Consider When Choosing a Magnesium Citrate Supplier

Choosing the right supplier affects product quality, regulatory compliance, and supply chain stability.

Consider these factors before placing an order:

• Purity and Non-Buffered Status

Some suppliers dilute magnesium citrate with cheap magnesium oxide to boost the elemental magnesium percentage artificially. Always demand a complete Certificate of Analysis (COA) to confirm pure citrate bonding.

• Manufacturing capability

Select suppliers with modern production facilities and proven manufacturing experience.

• Quality certifications

Look for ISO, HACCP, Kosher, and Halal certifications, or other relevant certifications that demonstrate quality management.

• Testing capability

Reliable suppliers perform comprehensive laboratory testing using validated analytical methods.

• Supply stability

Consistent inventory and scalable production help prevent delivery delays.

• Technical support

Professional suppliers provide formulation advice, regulatory documents, and responsive customer service.

• Global shipping experience

Export experience helps reduce customs issues and ensures smoother international deliveries.

Storage, Shelf Life, and Packaging Options for Bulk Shipments

Proper storage protects magnesium citrate from moisture and maintains product quality.

Store the product in a cool, dry, and well-ventilated warehouse. Keep containers tightly sealed after opening and avoid direct sunlight and excessive humidity.

Under recommended storage conditions, magnesium citrate generally has a shelf life of 24 months. You should always follow the storage instructions provided by the manufacturer.

Common bulk packaging options include:

• 1 kg aluminum foil bags
• 25 kg fiber drums with double PE liners
• Customized OEM packaging for large-volume customers

Proper packaging reduces contamination risks during international transportation and long-term storage.

Frequently Asked Questions About Magnesium Citrate Bulk Purchasing

Q1: Is magnesium citrate suitable for dietary supplements?

A: Yes. It is one of the most commonly used magnesium ingredients in dietary supplement formulations.

Q2: Which documents should suppliers provide?

A reliable supplier should provide a COA, SDS, TDS, specification sheet, and other quality documents when needed.

Q3: What is the difference between Anhydrous and Non-Hydrated forms?

Non-buffered tri-magnesium citrate anhydrous offers lower moisture content. It works best for moisture-sensitive formulations like effervescent tablets.

Q4: Can I request custom mesh sizes for my production line?

Yes, our factories can customize particle size from coarse granules for direct compression to super-fine powder for liquid suspensions.

Q5:What is the typical Minimum Order Quantity (MOQ)?

Our standard factory MOQ starts at 25 kg, though we accommodate smaller sample orders for initial pilot tests.

Streamline Your Sourcing with Maxmedchem

Ready to upgrade your formulation with premium, factory-direct magnesium citrate powder? Contact us today to request free sample kits, full technical dossiers, and a competitive bulk price quote!

Related Magnesium Sources

Magnesium Lactate vs Glycinate: Absorption, Performance and Applications
Wholesale Magnesium L- Threonate Powder Price In USA
Magnesium L-Threonate vs Magnesium Acetyl Taurate: Key Differences for Formulators
Magnesium Acetyl Taurate vs. Magnesium Taurate

References

U.S. Pharmacopeial Convention. Monographs for Magnesium Citrate and Tri-magnesium Citrate. USP-NF.
Walker, A. F., et al. Mg citrate found more bioavailable than other Mg preparations in a randomized, double-blind study. Magnesium Research, 2003.
European Food Safety Authority (EFSA). Scientific Opinion on the evaluation of magnesium citrate for nutritional purposes. EFSA Journal.
Food Chemicals Codex (FCC). Magnesium Citrate Specifications and Test Methods. 12th Edition.