Nitric acid is one of the most important chemicals used in gold refining. It is commonly used to dissolve base metals from gold alloys or as part of the aqua regia process for dissolving gold.
If you are refining scrap gold, jewelry, or electronic materials, using the correct grade of nitric acid is critical for achieving reliable results.
This guide explains what nitric acid is used for in gold refining, why purity matters, and where refiners can safely purchase it.
What Nitric Acid Is Used for in Gold Refining
Nitric acid is primarily used to dissolve base metals such as:
• copper
• zinc
• nickel
• silver (in certain processes)
When nitric acid reacts with these metals, it allows refiners to separate unwanted materials from precious metals.
One common refining process is aqua regia, where nitric acid is combined with hydrochloric acid to dissolve gold so it can later be recovered through precipitation.
Many refiners also use nitric acid to perform acid tests on jewelry and scrap to determine gold purity before refining.
If you want to test gold before refining, you can see professional testing kits here:
Jewelry Testing Kits for Gold, Silver & Platinum | Acid Test Kits | GTE – GOLD TESTING EQUIPMENT
Why Nitric Acid Purity Matters
Not all nitric acid is the same.
Low-grade or contaminated acid can cause problems such as:
• slow metal reactions
• inaccurate gold testing results
• unwanted chemical residues
• inconsistent refining outcomes
Professional refiners typically prefer high purity nitric acid to ensure predictable reactions and cleaner refining results.
Fresh acid is also important. Over time nitric acid can degrade or lose effectiveness if stored improperly.
If you need refining-grade acid, you can view our nitric acid for gold refining here.
JSP 32oz Nitric Acid 69.8% Concentrated ACS Lab Grade Best for Gold Re – GOLD TESTING EQUIPMENT
Safety Tips When Using Nitric Acid
Nitric acid is a strong corrosive chemical and must always be handled properly.
Important safety practices include:
• Always wear chemical resistant gloves
• Use proper eye protection
• Work in a well ventilated area or fume hood
• Store acid in approved chemical containers
• Keep neutralizing solutions nearby
Many refiners also keep neutralizing agents and precipitation chemicals available during the refining process.
For example:
• Sodium Metabisulfite (SMB) is commonly used to precipitate gold from solution
• Urea is often used to help neutralize excess nitric acid in aqua regia
Beginners often start with a complete gold refining kit that includes the chemicals and instructions needed for the process.
You can find refining chemicals here:
JSP Gold Precipitant 16 oz Refining Test Acid Aqua Regia Metals SMB Py – GOLD TESTING EQUIPMENT
Where to Buy Nitric Acid for Gold Refining
Nitric acid can sometimes be difficult to purchase due to shipping regulations and safety requirements.
Refiners typically purchase nitric acid from suppliers that specialize in precious metal testing and refining supplies, since these suppliers understand the purity and packaging requirements needed for refining work.
When buying nitric acid for gold refining, look for suppliers that provide:
• consistent chemical purity
• properly sealed containers
• clear labeling and instructions
• reliable shipping for corrosive chemicals
You can view refining-grade nitric acid here:
JSP 32oz Nitric Acid 69.8% Concentrated ACS Lab Grade Best for Gold Re – GOLD TESTING EQUIPMENT
Complete Gold Refining Kits
If you are new to gold refining, many refiners prefer to start with a complete refining kit that includes the chemicals and instructions needed for the process.
These kits often include:
• nitric acid substitute or refining acids
• precipitation chemicals
• fluxes and refining tools
• step-by-step instructions
You can view complete beginner refining systems here:
Gold Refining Chemicals & Supplies | Aqua Regia & Nitric Acid | GTE – GOLD TESTING EQUIPMENT
Final Thoughts
Nitric acid plays an important role in gold refining and precious metal recovery. Using the correct purity and handling the chemical safely will help ensure reliable results and efficient refining.
Whether you are testing gold, refining scrap jewelry, or recovering precious metals from electronic materials, having the right refining chemicals and tools makes the process much easier.
Related Guides
You may also find these helpful:
How to Test Gold at Home
Magnet Test for Gold Explained
How to Test Silver Jewelry
Recommended Gold Refining Supplies
If you're refining scrap gold, jewelry, or electronic components, using the correct chemicals and fresh reagents is critical for consistent results. These supplies are commonly used in the aqua regia gold refining process.
Hydrochloric Acid for Aqua Regia