Antimony Trichloride Storage — SbCl3 Lewis-Acid Catalyst Tank

Storing Antimony Trichloride? Start Here

Antimony trichloride is a colorless-to-pale-yellow solid used in various industrial processes, including as a catalyst and in flame-retardant formulations. It's known for its waxy texture and fumes when exposed to moisture, releasing hydrochloric acid. If you're handling antimony trichloride, it's crucial to store it correctly to prevent moisture exposure and ensure safety.

Can you store it in a poly tank?

Yes, you can store antimony trichloride in a polyethylene (poly) tank, but it must be kept dry to prevent moisture exposure. HDPE or XLPE tanks are standard for solid storage, while aqueous solutions can also be stored in these materials. Ensure the storage area is dry to avoid hydrolysis and fuming.

Watch out for moisture exposure

Antimony trichloride is hygroscopic, meaning it absorbs moisture from the air. This can lead to the release of hydrochloric acid fumes, which are corrosive. Always store it in a dry environment and use proper seals to prevent moisture ingress.

The safety that actually matters

• Store in a dry, well-ventilated area to prevent moisture exposure.
• Use appropriate personal protective equipment (PPE) when handling.
• Ensure proper labeling and access to safety data sheets (SDS).

Common questions

What type of gasket should I use?

Match gaskets to the manufacturer chart; EPDM is standard, but Viton is preferred for high temperatures.

Can it be stored in stainless steel tanks?

No, stainless steel is not recommended due to potential pitting from chloride exposure.

Is antimony trichloride safe for long-term storage?

Yes, if stored in dry conditions and in compatible containers like HDPE drums.