Magnesium stearate
Magnesium stearate (CAS 557-04-0), molecular formula [CH3(CH2)16CO2]2Mg, is a high-purity chemical supplied by Tech Serve Solutions for chemical synthesis applications, to pharmacopoeia specification (USP, BP, EP). Every batch is tested and ships with a Certificate of Analysis; MSDS and technical data sheets are available on request. Tech Serve Solutions has supplied laboratory reagents, fine chemicals and pharmaceutical intermediates worldwide since 1998.
- IUPAC
- Stearic acid magnesium salt
| Molecular weight | 591.24 |
|---|---|
| Linear formula | [CH3(CH2)16CO2]2Mg |
| Assay | ≥40% stearic acid basis (GC)≥90% stearic and palmitic acid basis4.0-5.0% Mg basis (calc on dry sub.) |
| Grade | puriss. |
| Solubility | alcohol: insolublediethyl ether: insolublewater: insoluble |
| Loss on drying | ≤6.0% loss on drying, 105 °C |
| Impurities tested | acidity or alkalinity, compliesmicrobiological impurity, in accordanceresidual solvents, complies |
| Melting point | 200 °C(lit.) |
| Application | Magnesium stearate has been used as a tablet and capsule lubricant.1 It has also been used for preparing microcapsules.2 |
| Suitability | in accordance for fatty acid compositionpasses test for identity |
Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | nwg |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26 |
| Cation traces | Cd: ≤3 mg/kgNi: ≤5 mg/kgPb: ≤10 mg/kg |
| Anion traces | chloride (Cl-): ≤1000 mg/kgsulfate (SO42-): ≤5000 mg/kg |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Quality | meets analytical specification of Ph. |
|---|---|
| Acid Value | 195‑210(fatty acid) |
Documentation
Supplied to USP, BP and EP standards. Every batch ships with a Certificate of Analysis (assay, identity, purity); MSDS and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Magnesium stearate?
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Magnesium stearate (CAS 557-04-0), molecular formula [CH3(CH2)16CO2]2Mg, is a high-purity chemical supplied by Tech Serve Solutions for chemical synthesis applications, to USP, BP and EP standards.
What grades of Magnesium stearate does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Magnesium stearate in USP, BP, EP and reagent/AR grades. Custom specifications for nutraceutical or specialty pharmaceutical applications are available — contact our technical sales team.
What is the CAS number and molecular formula of Magnesium stearate?
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Magnesium stearate has CAS number 557-04-0 and molecular formula [CH3(CH2)16CO2]2Mg. Full specifications appear in the table above and in the Certificate of Analysis.
What is the typical minimum order quantity and lead time for Magnesium stearate?
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Sample quantities are available for technical evaluation; bulk MOQ depends on grade and packaging. In-stock material typically ships in 7–10 working days; custom-spec orders take 3–4 weeks. Tech Serve Solutions ships worldwide with full export documentation.
Do you provide a Certificate of Analysis (CoA) with each shipment?
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Yes. Every batch of Magnesium stearate ships with a Certificate of Analysis covering assay, identity and purity tests, plus pharmacopoeia conformance where applicable. MSDS and TDS documents are available on request before order placement.
How should Magnesium stearate be stored?
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Store Magnesium stearate in its original sealed container in a cool, dry place away from direct sunlight and incompatible materials, in line with the storage guidance on the Safety Data Sheet. Reseal between dispensings.
What is Magnesium stearate used for?
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Magnesium stearate is used in chemical synthesis applications across pharmaceutical, research and industrial settings. Our technical team can advise on suitability for your specific process.
How do I request a quote for Magnesium stearate?
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Request a quote with your required grade, quantity and destination via https://www.techservesolutions.in/contact or email info@techservesolutions.in. We respond with specifications, a Certificate of Analysis and pricing.
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