- ▸ Acid scavenger and co-stabilizer in PVC and halogen-containing polymer compounds, neutralizing HCl liberated during processing to prevent discoloration and chain degradation.
- ▸ Costabilizer that improves the heat and color stability of flexible and rigid PVC when used alongside Ca/Zn stabilizer systems, reducing or replacing heavy-metal stabilizers.
- ▸ Catalyst-residue (chloride) neutralizer in polyolefins such as polyethylene and polypropylene, protecting equipment and improving long-term thermal stability.
- ▸ Functional mineral filler and rheology aid in coatings, sealants, and rubber compounds where its layered structure provides barrier and anion-exchange properties.
- ▸ Precursor for layered double hydroxide (LDH) nanocomposites and flame-retardant additive systems in specialty plastics and construction materials.
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
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Hydrotalcite is a synthetic layered magnesium-aluminum hydroxycarbonate used as a halogen-scavenging heat stabilizer and acid acceptor in PVC and polyolefins, and as a smoke suppressant. Identity: CAS 11097-59-9.
What it is
Hydrotalcite (CAS 11097-59-9, synthetic Mg-Al hydroxycarbonate) is a white layered-double-hydroxide powder. Its layered structure absorbs and neutralizes acids and exchanges anions.
Industrial uses
It is used as a halogen scavenger and co-stabilizer in PVC and Ca/Zn stabilizer systems (neutralizing HCl evolved during processing), an acid acceptor/catalyst-residue neutralizer in polyolefins, and a smoke suppressant and acid neutralizer in flame-retardant compounds. It also serves as an anion-exchange and adsorbent material.
See smoke-suppression and acid-neutralizer context in the flame retardants guide.
Forms, grades and handling
Hydrotalcite is supplied as a fine white powder (coated and uncoated grades) in bags and bulk. Properties are typical reference values; the Certificate of Analysis (CoA) for the lot you buy governs. Always consult the current Safety Data Sheet (SDS) before handling, and confirm regulatory status and suitability for your application and jurisdiction. Each lot ships with CoA, TDS and SDS.
Bulk supply and RFQ
RawSource sources Hydrotalcite direct from producers in bulk, with CoA, TDS and SDS per lot. Tell us the grade, particle size or specification and quantity you need, and we will quote it. Products are sold for industrial and professional use.
Typical Properties
Typical reference values, not a specification; the Certificate of Analysis (CoA) for the lot governs.
| Property | Typical Value |
|---|---|
| Chemical / class | Layered mineral (PVC stabilizer) |
| CAS Number | 11097-59-9 |
| Molecular Formula | Mg6Al2(OH)16CO3·4H2O |
| Handling | Refer to the current SDS |
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 234-319-3
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Frequently Asked Questions
What is hydrotalcite used for?
Hydrotalcite (synthetic Mg-Al hydroxycarbonate, CAS 11097-59-9) is used as a halogen-scavenging heat stabilizer/acid acceptor in PVC and Ca/Zn systems, an acid neutralizer in polyolefins, and a smoke suppressant in flame-retardant compounds. RawSource supplies it for industrial use.
How is bulk hydrotalcite supplied and quoted?
RawSource supplies hydrotalcite in bulk with CoA, TDS and SDS per lot. Pricing is quote-based on grade, particle size/specification and volume; submit an RFQ with your application and quantity.
What is the REACH and TSCA regulatory status of Hydrotalcite (Synthetic Magnesium Aluminum Hydroxycarbonate)?
Hydrotalcite (Synthetic Magnesium Aluminum Hydroxycarbonate) (CAS 11097-59-9) is subject to U.S. TSCA Inventory requirements; supplying it into the EU requires valid REACH registration ((EC) No 1907/2006). RawSource cannot verify a third-party supplier's registrations — buyers should require documented TSCA and REACH compliance for their jurisdiction and volume (EC 234-319-3).