MAGNESIUM SULFATE; POLYETHYLENE GLYCOL 3350; POTASSIUM CHLORIDE; SODIUM CHLORIDE; SODIUM SULFATE: Pharmaceutical manufacturers, suppliers, and distributors

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Applicant	Tradename	Generic Name	Dosage	NDA	NDA/ANDA	Supplier	Package Code	Package	Marketing Start
Azurity	SUFLAVE	magnesium sulfate; polyethylene glycol 3350; potassium chloride; sodium chloride; sodium sulfate	FOR SOLUTION;ORAL	215344	NDA	Azurity Pharmaceuticals, Inc.	24338-550-01	1 KIT in 1 KIT (24338-550-01)	2026-04-01
Azurity	SUFLAVE	magnesium sulfate; polyethylene glycol 3350; potassium chloride; sodium chloride; sodium sulfate	FOR SOLUTION;ORAL	215344	NDA	Braintree Laboratories, Inc.	52268-550-01	1 KIT in 1 KIT (52268-550-01)	2023-06-15
>Applicant	>Tradename	>Generic Name	>Dosage	>NDA	>NDA/ANDA	>Supplier	>Package Code	>Package	>Marketing Start

Last updated: May 25, 2026

Executive summary

You can source the listed actives/excipients and salts through global bulk-chemical and pharmaceutical-grade suppliers with established downstream capabilities (compounding, controlled-particle/assay specs, and regulatory documentation). For US/EU-ready procurement, prioritize suppliers that publicly support GMP manufacturing, DMF/CoA traceability, and supply continuity for bulk salts and PEG 3350.

Core supplier categories by material

Bulk salts (MgSO4, KCl, NaCl, Na2SO4, Na2SO4·xH2O): multiple global inorganic chemical producers plus pharma-grade salt specialists.
PEG 3350 (polyethylene glycol 3350): dedicated polymer suppliers with pharma excipient portfolios.
Drug-product packaging and compounding supply chain: separate from API/excipient sourcing.

Because only the chemical names are provided, the supplier set below is built around widely used pharmaceutical-grade and bulk-chemical producers that sell to drug manufacturers and contract packagers.

Who supplies magnesium sulfate (MgSO4) for pharmaceutical use?

Typical purchasing products

Magnesium sulfate heptahydrate (MgSO4·7H2O)
Magnesium sulfate anhydrate
Pharmaceutical-grade bulk for injectable/infusion manufacture or oral formulations (depending on grade and specs)

Supplier set (inorganic salts, pharma-grade and bulk)

ICL Group (Israel Chemicals): magnesium and magnesium sulfate chain; commonly used as pharma-grade salt supply through affiliates and chemical distribution.
K+S / Compagnie de Saint-Gobain? (historically in salt markets; current procurement typically via chemical distributors and specialty inorganic producers)
Merck KGaA (MilliporeSigma): sells magnesium sulfate grades with analytical documentation suitable for pharmaceutical workflows (manufacturing and QC).
Thermo Fisher Scientific: distributes magnesium sulfate grades for lab and industrial/pharma supply chains.
TCI Chemicals: magnesium sulfate grades for research-to-production sourcing.
Loba Chemie / Chem-Impex / Fisher Scientific distribution networks: common pharma-lab/industrial procurement channels depending on intended use.

Procurement guidance for magnesium sulfate

Confirm whether the supplier sells pharmaceutical-grade salt versus technical grade.
Require batch-level documentation: assay, water content, insoluble matter, pH, heavy metals, and trace impurity profile.

Which companies supply polyethylene glycol 3350 (PEG 3350) as a pharma excipient?

PEG 3350 is a widely used osmotic laxative excipient and base material in oral solutions and compounded regimens. Suppliers usually differentiate by molecular weight distribution, particle size, and microbiological quality.

Key PEG 3350 excipient supplier set

BASF: PEG excipients including PEG 3350 and related polymer grades.
Dow (The Dow Chemical Company): polymer excipient supply; PEG family grades.
Merck KGaA (MilliporeSigma): PEG 3350 pharmaceutical and research grades via distribution.
Thermo Fisher Scientific: PEG 3350 grades for pharma workflows depending on grade specification.
Ashland (via polymer excipient business lines, where applicable): supplies polymer excipients in pharma-qualified form.
Croda / Evonik? (Croda supplies some excipients; PEG 3350 specifically depends on product line availability and regional catalog)

Procurement guidance for PEG 3350

Specify molecular weight range (PEG 3350 is typically “nominal” with distribution).
Confirm excipient acceptance parameters: microbial limits, endotoxins/bioburden if used in sterile-adjacent or sensitive contexts, and residuals.

Who supplies potassium chloride (KCl) for pharmaceutical production?

Potassium chloride is used as a saline component and for correction of electrolytes. Pharma KCl is typically required as a USP/NF grade or equivalent depending on target market.

Supplier set

Merck KGaA (MilliporeSigma): KCl pharmaceutical grades.
TCI Chemicals: KCl grades used in pharma and analytical workflows.
Thermo Fisher Scientific: KCl distribution.
US/EU salt producers and contract manufacturers: many supply KCl to pharma via branded catalog and distribution rather than direct disclosure.

Procurement guidance for KCl

Confirm USP/EP compliance and impurity profile (e.g., Na, Ca, heavy metals).
Validate particle size and insoluble matter limits for the intended dosage form.

Which suppliers provide sodium chloride (NaCl) for injectable and oral formulations?

Sodium chloride supply is broad, with specialized pharmaceutical salt producers and major chemical distributors.

Supplier set

Merck KGaA (MilliporeSigma): NaCl pharmaceutical grades.
Thermo Fisher Scientific: NaCl distribution.
Fisher Chemical (via Fisher/Thermo catalogs): NaCl grades.
Major inorganic salt producers: provide pharma-grade NaCl into the supply chain through distribution channels.

Procurement guidance for NaCl

For injection use, suppliers must meet stringent requirements: sterility is usually achieved at the finished sterile drug-product step, but the salt feed grade still needs tight impurity control and trace metal limits.
Confirm iodide/bromide content limits, heavy metals, and endotoxin-related controls if applicable.

Who supplies sodium sulfate (Na2SO4) for pharmaceutical-grade use?

Sodium sulfate is commonly used as a processing aid and in formulations requiring a sulfate salt. Pharma grade is required for certain product uses.

Supplier set

Merck KGaA (MilliporeSigma): Na2SO4 grades.
Thermo Fisher Scientific: Na2SO4 distribution.
TCI Chemicals: Na2SO4 grades.
Bulk inorganic chemical producers: provide pharma-grade through qualified distribution and contract supply.

Procurement guidance for Na2SO4

Identify the form: anhydrous sodium sulfate vs sodium sulfate decahydrate (Glauber’s salt), since solubility and water content affect formulation.
Confirm heavy metals and insoluble matter specs for oral or process-critical uses.

What documentation and quality systems matter most when buying these salts and PEG 3350?

For drug manufacturers, sourcing success usually hinges on documentation package and audit readiness more than brand.

Minimum procurement packet to require

GMP status confirmation (for excipients and salts intended for manufacturing)
Certificate of Analysis (CoA) for the specific batch
Quality agreement readiness (vendor responsibilities, change control)
Specification sheet matching USP/NF/EP or internal drug product specs
Impurities declaration for typical pharmaceutical thresholds (heavy metals, residue solvents if relevant)

Typical USP/EP expectations

Sodium and potassium salts: impurity profile and identity testing
Magnesium sulfate: assay and water of crystallization checks
Sodium sulfate: correct hydration form (if relevant) and insoluble matter
PEG 3350: molecular weight distribution and microbiological limits

How do these suppliers typically sell into pharmaceutical supply chains? (Direct vs distribution)

Bulk inorganic salts

Many inorganic salt producers sell via chemical distributors and procurement platforms.
Direct supplier relationships are common when high volume or long-term supply agreements are required.

PEG 3350

Polymer excipient suppliers often sell directly to excipient distributors and to drug manufacturers under excipient specifications.
Distribution remains common for catalog flexibility.

Supplier shortlists by procurement style

If you need pharma-grade catalog supply (fast onboarding)

Merck KGaA (MilliporeSigma)
Thermo Fisher Scientific (Fisher Chemical)
TCI Chemicals

If you need excipient polymer specialization (PEG 3350)

BASF
Dow
Merck KGaA (MilliporeSigma)
Thermo Fisher Scientific

If you need long-term bulk inorganic contracts

Major inorganic chemical producers (often supplied through distributors)
Global salt and inorganic producers with pharma-grade offerings

Key Takeaways

Merck KGaA (MilliporeSigma), Thermo Fisher Scientific, and TCI are reliable starting points for pharma-grade catalog sourcing for MgSO4, KCl, NaCl, and Na2SO4, and for PEG 3350 via excipient and chemical grades.
BASF and Dow are leading upstream polymer suppliers for PEG 3350 in established excipient supply chains.
For inorganic salts, supplier onboarding usually depends on GMP status, CoA traceability, and impurity specs matching the intended dosage form and regulatory market.

FAQs

What grade of magnesium sulfate (heptahydrate vs anhydrous) is used in pharmaceutical formulations?
Which PEG 3350 supplier portfolio aligns with USP/NF excipient requirements?
How do manufacturers validate sodium chloride feedstock for sterile drug-product processing?
What sodium sulfate hydration form is typically preferred for drug manufacturing and why?
Can excipient and inorganic salt suppliers be audited under a single quality agreement framework?

References

No source documents were used in constructing the supplier lists above.

Suppliers and packagers for generic pharmaceutical drug: MAGNESIUM SULFATE; POLYETHYLENE GLYCOL 3350; POTASSIUM CHLORIDE; SODIUM CHLORIDE; SODIUM SULFATE