# JSP Gold Precipitant 8 oz Refining & Recovery Test Acid Aqua Regia Metals SMB Pyrosulfite

This listing includes **one 8 oz bag of JSP Sodium Metabisulfite (Na₂S₂O₅)**, a high-purity chemical commonly used in precious metal refining to **precipitate dissolved gold from aqua regia solutions**.

Sodium Metabisulfite is widely used by refiners and hobbyists during the gold recovery process to convert dissolved gold in solution back into solid metallic gold powder.

Also known as **SMB, Sodium Pyrosulfite, and Disodium Metabisulfite**, this reagent is a standard and reliable gold precipitant in the aqua regia refining process.

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### Product Details

• **Product:** Sodium Metabisulfite (Na₂S₂O₅)  
• **Weight:** 8 ounces (½ lb)  
• **Purity:** 99%  
• **Form:** White crystalline powder  
• **Grade:** Photo/Food grade

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### Common Use in Gold Refining

Sodium Metabisulfite is used to **precipitate gold from filtered aqua regia solutions** after the gold has been dissolved.

Typical usage guideline:

Mix approximately **1 ounce of Sodium Metabisulfite with 20–30 ml of water per ounce of gold dissolved in solution**, then slowly add the mixture to the filtered aqua regia solution to precipitate the gold.

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### Ideal For

• Gold refining  
• Precious metal recovery  
• E-waste processing  
• Laboratory and refining applications

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If you have any questions about this product or refining supplies, please feel free to contact us. We look forward to serving you.

## Details

- **Price:** 14.97 USD
- **Vendor:** GOLD TESTING EQUIPMENT
- **Type:** Gold Refining
- **Tags:** GOLD TESTING EQUIPMENT, Shopify Collective

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 14.97 USD | In stock |

## Images

- JSP Gold Precipitant 8 oz Refining & Recovery Test Acid Aqua Regia Metals SMB Pyrosulfite
- JSP Gold Precipitant 8 oz Refining & Recovery Test Acid Aqua Regia Metals SMB Pyrosulfite
- JSP Gold Precipitant 8 oz Refining & Recovery Test Acid Aqua Regia Metals SMB Pyrosulfite

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> Source: [Smart supply deals](https://smartsupplydeals.com/products/jsp-gold-precipitant-8-oz-refining-recovery-test-acid-aqua-regia-metals-smb-pyrosulfite)
> Updated: 2026-07-22