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SHEET /m/magnesium-stearate · PubChem CID 11177 · CAS 557-04-0 · REV 2026.07

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Magnesium stearate

from source

C36H70MgO4 · 591.2 g/mol

magnesium octadecanoate · Magnesii stearas

What is Magnesium stearate?

The lubricant that stops tablet powder sticking to the press. It is in a huge share of pills and capsules, at well under one percent. from source

CategoryFood & flavor
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Fig. 1 · 2D structure RDKit

SMILESCCCCCCCCCCCCCCCCCC(=O)[O-].CCCCCCCCCCCCCCCCCC(=O)[O-].[Mg+2]

Toxicity & hazards

WarningIrritantH315, H316, H319, H320, H335, H413from source

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Where Magnesium stearate leads

Relatedcomputed
Stearic acid57% similarPalmitic acid57% similarLauric acid57% similarCaprylic acid57% similarMyristic acid57% similarPentadecylic acid57% similar

Sources & methodology

PubChem CID
11177
Wikidata
Q416713
Structure
PubChem → RDKit
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