Sodium Stearyl Fumarate
USP/NF and EP-grade Sodium Stearyl Fumarate (CAS 4070-80-8) supplied wholesale by Zyntex. Hydrophilic tablet lubricant and alternative to magnesium stearate for tablets, effervescents, ODTs and capsules. CoA and SDS.
Description
Sodium Stearyl Fumarate Product Overview
Sodium stearyl fumarate (C22H39NaO4) is a fine, white powder. It is less hydrophobic than Magnesium Stearate, so it slows tablet dissolution less, is less sensitive to over-mixing and is compatible with more active ingredients.
In addition, pharmaceutical and nutritional producers use it at about 0.5–2% in tablets, effervescent tablets, orally disintegrating tablets and capsules, especially where magnesium stearate causes dissolution or compatibility problems. Similarly, it suits formulations that need to be free of animal-derived stearates.
Notably, related excipients in our range include Magnesium Stearate, Croscarmellose Sodium, Crospovidone and Copovidone.
Key Applications of Sodium Stearyl Fumarate
Typical uses include, for example:
💊 Tablets
Hydrophilic lubricant.
🫧 Effervescent Tablets
Water-soluble friendly lubricant.
👅 ODTs
Fast-disintegrating tablets.
💊 Capsules
Filling aid.
Sodium Stearyl Fumarate Technical Specifications
| Parameter | Standard Value |
|---|---|
| Product Name | Sodium Stearyl Fumarate |
| CAS Number | 4070-80-8 |
| Molecular Formula / Weight | C22H39NaO4 / 390.53 g/mol |
| Grade | USP/NF, EP |
| Typical Use Level | 0.5 – 2% |
| Appearance | Fine white powder |
| Documents | CoA and SDS with every lot |
⚠️ Safety & Handling: Not classified as hazardous under GHS; fine dust may form explosive mixtures with air. Avoid dust formation. Store in tightly closed containers in a dry place. Always consult the Safety Data Sheet (SDS), because it contains the full classification and handling instructions.
Frequently Asked Questions
Why use it instead of magnesium stearate?
It slows dissolution less, tolerates longer mixing and is compatible with more APIs.
How much is used?
Typically about 0.5–2% of the blend.
How can I get a price and documents?
We supply flexible quantities, from small orders to large volumes, so you do not need to meet the high minimum orders of large producers. Please contact us with your required volume, and we will send a quotation together with the CoA and SDS.
