Sulfates

Sulfates for Food Ingredient and Industrial Supply

Kolod supplies a diverse sulfate range – including magnesium, potassium, sodium, iron, manganese, copper, zinc, and ammonium compounds in various hydration states and grades – for food ingredient, mineral premix, laboratory, and industrial applications, with each product selected by chemical identity, specification, and intended end use.

Magnesium Sulphate Heptahydrate -food Grade 99.5% (epsom ...
Jiangsu Kolod Food Ingredients Co., Ltd. manufactures and supplies Food Grade Magnesium Sulphate Heptahydrate (MgSO₄·7H₂O), also known as Epsom Salt, with an assay of at least 99.5% on a...
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Ferrous Sulfate Monohydrate
Food Grade Ferrous Sulfate Monohydrate (FeSO₄·H₂O) is an iron compound for selected food fortification and fruit and vegetable processing applications. Kolod supplies this product for food...
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Food Grade Potassium Sulfate
Food Grade Potassium Sulfate (K₂SO₄, CAS 7778-80-5) is a crystalline food ingredient used as a flavoring agent and adjuvant. Jiangsu Kolod Food Ingredients Co., Ltd. supplies food ingredient...
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Food Grade Sodium Sulfate
Jiangsu Kolod Food Ingredients Co., Ltd. manufactures and supplies food-grade sodium sulfate for global food processing, ingredient manufacturing, and specialized industrial formulations....
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Food Grade Magnesium Sulfate Heptahydrate
Jiangsu Kolod Food Ingredients Co., Ltd. supplies Food Grade Magnesium Sulfate Heptahydrate for food ingredient sourcing and selected food and beverage processing applications. Also known as Epsom...
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Food Grade Magnesium Sulfate Dried
Jiangsu Kolod Food Ingredients Co., Ltd. manufactures food-grade dried magnesium sulfate for mineral fortification and food processing applications.
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Manganese Sulfate Food Grade
Manganese sulfate monohydrate is an inorganic manganese salt supplied as pale pink crystals, primarily utilized in food fortification and nutritional formulations.
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Food Grade Ferrous Sulfate Heptahydrate
We supply Food Grade Ferrous Sulfate Heptahydrate in blue-green crystals or granules for food iron fortification, nutritional supplement production and fruit and vegetable processing. The product...
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Food Grade Copper Sulfate
Food Grade Copper Sulfate Pentahydrate (CuSO₄·5H₂O) is used as a copper source in nutritional premixes and permitted food applications. Supplied in 25 kg bags, it serves food ingredient...
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Food Grade Zinc Sulfate Monohydrate
Jiangsu Kolod Food Ingredients Co., Ltd. supplies Food Grade Zinc Sulfate Monohydrate for food fortification, nutritional premixes, and other permitted food applications. We provide product...
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Ammonium Sulfate Food Grade
Jiangsu Kolod supplies Food Grade Ammonium Sulfate to wholesalers, importers, distributors and food manufacturers for fermentation and yeast production. We provide bulk supply in 25 kg bags,...
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Reagent Grade Ammonium Ferric Sulfate
Reagent Grade Ammonium Ferric Sulfate, also known as ammonium iron(III) sulfate dodecahydrate, is an inorganic iron salt supplied in crystalline form for laboratory analysis, chemical testing and...
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Sulfate Portfolio Selection Guide

Product Name	Hydration / Physical Form	Key Primary Functions	Primary Target Sectors
Magnesium Sulphate Heptahydrate (Epsom Salt) 99.5%	High-Purity Crystalline	Fermentation substrate, mineral balance, tofu coagulation	Brewing, Beverage, Plant-based Dairy
Food Grade Magnesium Sulfate Heptahydrate	Crystalline Powder / Granular	Mineral fortification, flavor enhancement, brine processing	Bottled Water, Sports Beverages
Food Grade Magnesium Sulfate Dried	Anhydrous/Low Moisture Powder	Moisture-sensitive dry blending, desiccation aid	Powdered Drink Mixes, Premixes
Ferrous Sulfate Monohydrate	Free-Flowing Fine Granular	Stable iron fortification, low oxidation profile	Flour Enrichment, Bakery Premixes
Food Grade Ferrous Sulfate Heptahydrate	Crystalline Salt	High-solubility iron fortificant, feed/food nutritional additive	Infant Foods, Syrups, Dietary Supplements
Food Grade Zinc Sulfate Monohydrate	Monohydrate Powder	Stable zinc source, enzyme activity activator	Nutritional Supplements, Infant Formula
Manganese Sulfate Food Grade	Pale Pink Powder/Granules	Essential trace element, fermentation nutrient	Multivitamin Premixes, Dietary Supplements
Food Grade Copper Sulfate	Fine Crystalline Blue Powder	Essential copper trace element, processing catalyst	Fortified Foods, Specialized Nutrition
Food Grade Potassium Sulfate	White Powder	Sodium-free potassium fortificant, ionic balance	Low-Sodium Foods, Dietary Supplements
Food Grade Sodium Sulfate	Crystalline / Powder	Viscosity regulator, processing carrier, standardized salt	Food Processing, Food Additives
Ammonium Sulfate Food Grade	Crystalline Powder	Yeast food, dough conditioner, nitrogen source	Industrial Baking, Fermentation Systems
Reagent Grade Ammonium Ferric Sulfate	High-Purity Analytical Grade	Analytical indicator, redox titrant, laboratory reagent	QC Testing, Analytical Chemical Labs
Reagent Grade Ammonium Ferrous Sulfate	High-Purity Analytical Grade	Analytical primary standard, reductant in titration	R&D, Chemical Analysis, QC Labs

Hydration State Matters in Sulfate Procurement

Heptahydrate vs. Monohydrate vs. Dried Forms:

Form	Composition	Key Consideration
Heptahydrate	Contains 7 molecules of water of crystallization	Not equivalent to other hydration states on a weight-for-weight basis
Monohydrate	Contains 1 molecule of water of crystallization	Different molecular composition and mineral content per unit mass
Dried	Different water content from hydrated forms	"Dried" alone does not establish a specific formula or guarantee anhydrous material

Chemical Identity: Confirm the exact compound and hydration state – not just the product name.

Assay Basis: Establish whether results are reported on an as-supplied, dry, or other defined basis – this directly affects dosage calculations.

Elemental Content: Compare the relevant mineral content against your formulation target – ensuring the active mineral meets your requirements.

Moisture Specification: Distinguish free moisture from water of crystallization where relevant – as these affect composition and handling differently.

Physical Requirements: Confirm particle size, appearance, and handling characteristics if these affect your processing – especially for dry blending or premix applications.

Match the Product Grade to Its Intended Use

Food-Grade Sulfates: Must meet applicable requirements for the specific compound and intended use – including destination market food regulations, purity limits, contaminant specifications, and supporting documentation (e.g., FCC, E-number monographs, or equivalent).

Reagent-Grade Sulfates: Selected according to laboratory or analytical requirements – with suitability depending on specified grade, assay, impurity profile, and analytical method (e.g., ACS, ISO, or equivalent). The two ammonium iron sulfate products in our range are reagent grade and should be assessed per laboratory requirements, not food ingredient requirements.

How to Reduce Specification Mismatches: Before requesting a quotation, identify the intended application and any mandatory standards (e.g., USP, EP, FCC, GB). If your organization has an approved material specification, provide it with the inquiry – helping clarify whether the required product form and grade match the proposed material.

Packaging, Moisture Control & Handling SOPs

Hygroscopic Moisture Shield:

Many sulfate salts are susceptible to moisture absorption and caking in humid ambient conditions. We use specialized thick inner PE liners paired with moisture-barrier multi-wall Kraft paper bags or sealed plastic drums.

Palletization & Transport:

Heated ISPM-15 wooden or plastic pallets wrapped with heavy-duty stretch film and desiccants to withstand transatlantic ocean freight conditions.

Storage Recommendations:

Keep sealed in original packaging in a cool (< 25°C), dry warehouse (< 55% RH). Avoid stacking excess pallets to minimize compression caking over long storage periods.

Quality Control, Safety & Compliance Standards

Heavy Metal Elimination: Multi-stage precipitation and filtration processes keep Lead (Pb), Arsenic (As), Cadmium (Cd), and Mercury (Hg) levels well below strict European Commission and US FDA limits.

Certifications: FSSC 22000, ISO 9001, Kosher, Halal, Non-GMO, and REACH compliant.

Batch Consistency: Every shipment is tested via ICP-OES and AAS to ensure exact elemental distribution and purity assays.

Documentation Pack Included:
• Certificate of Analysis (COA) for every lot
• Safety Data Sheets (SDS) in multilingual formats (GHS/REACH)
• Heavy Metals & Allergen Free Statements
• Certificate of Origin & Tariff Code Documentation

FAQ

Q: What should I check when choosing a sulfate product?

A: Start with the exact chemical compound, intended application, and required grade. Then confirm hydration state, assay basis, impurity limits, physical requirements, and applicable regulatory conditions.

Q: What is the difference between magnesium sulfate heptahydrate and dried magnesium sulfate?

A: Heptahydrate has seven molecules of water of crystallization; dried magnesium sulfate may have a different moisture profile and composition. Confirm the exact specification and assay basis before treating them as alternatives.

Q: Are ferrous sulfate monohydrate and ferrous sulfate heptahydrate interchangeable?

A: Not on a weight-for-weight basis without technical assessment – their hydration states and elemental iron content per unit mass differ. Any substitution should be based on specifications and formulation calculations.

Q: Can food-grade and reagent-grade sulfates be used for the same purpose?

A: Not automatically – the grades serve different specification and application requirements. Reagent-grade designation does not establish food-use suitability.

Q: Can I request a CoA and technical data sheet?

A: Yes – Specify required documents when requesting a quotation. Confirm availability and scope for the selected product, including whether a batch-specific CoA is available.

Q: Are customized packaging options available?

A: Yes – Packaging requirements can be discussed with our sales team. Provide preferred pack size, order quantity, labeling needs, and destination so available options can be confirmed.

Q: What is the minimum order quantity?

A: MOQ depends on product, available packaging, stock status, and order requirements. Submit your target quantity and destination to confirm applicable purchasing terms.

Q: How long does an export order take?

A: Lead time depends on product availability, order quantity, packaging, documentation, and destination. Share your required delivery date when requesting a quotation so we can assess the proposed schedule.

Q: Can I request samples before a bulk order?

A: Yes – Sample requests are reviewed according to product availability and intended evaluation. Include product name, required sample quantity, destination, and testing purpose in your inquiry.

Q: What information should I include in a sulfate RFQ?

A: Provide exact product name, grade, specification, quantity, destination country, packaging preference, required documents, and target delivery schedule. For products with different hydration states, explicitly state the required chemical form.

We are one of the most professional sulfates manufacturers and suppliers in China, featured by quality products and good price. Please rest assured to wholesale bulk premium sulfates made in China here and get free sample from our factory. Customized orders are welcome.