Nitric Acid 64.6% Lab Grade

Description

 Nitric Acid 64.6%

Laboratory / Technical Grade

*Excellent for gold refining

Nitric Acid 64.6% (41° Baumé) (HNO3) is a highly corrosive mineral acid widely used in various industrial application.  It is a clear to pale yellow in color and is a strong oxidizing agent known for its corrosive properties.  It is commonly used in chemical manufacturing, metal processing, and as a laboratory reagent. 

Nitric Acid plays a key role in refining gold, particularly in methods like aqua regia refining and in parting processes.   Urban mining and pcb board gold recovery commonly uses nitric acid to dissolve gold.  *Ships in Level 4 Fluorinated Polyethylene Bottles, 55g ships in HDPE blue drum. 

Aqua Regia Gold Refining Process (Most Common Use)
Aqua regia is a mixture of nitric acid (HNO₃) and hydrochloric acid (HCl) in a 1:3 ratio. This combination dissolves gold, which neither acid can do alone.

Step-by-step Overview:
Preparation of Aqua Regia:

Mix 1 part nitric acid with 3 parts hydrochloric acid.

Dissolution:

Add impure gold to the aqua regia.

Nitric acid oxidizes the gold to gold ions (Au³⁺).

Hydrochloric acid provides chloride ions (Cl⁻) to form chloroauric acid (HAuCl₄), which is soluble.

Filtration:

Filter the solution to remove impurities and undissolved metals.

Precipitation:

Add a reducing agent like sodium metabisulfite (Na₂S₂O₅) to the solution.

This causes pure gold to precipitate out of solution as fine particles.

Washing & Melting:

Wash the gold powder, dry it, and melt it to form pure gold bars or granules.

 

Chemical Formula: HNO3
Molecular Weight: 63.013
CAS Registry Number: 7697-37-2
Appearance Colorless to faint yellow
Odor: Acrid
Density

> 1.4078@ 25 °C
Boiling Point: 248 'F 67.2% HNO3
Solubility in water: Completely Soluble
GHS Pictograms:   OxidizerCorrosiveAcute Toxic
GHS Signal Word: Danger
GHS Hazard Statements: H272, H314, H330
GHS Precautionary Statements P210, P220, P260, P264, P271, P280, P284, P301+P330+P331, P302+P361+P354, P304+P340, P305+P354+P338, P316, P320, P321, P363, P370+P378, P403+P233, P405, and P501
UN Identification Number: 2031
Proper Shipping Name: Nitric Acid
Transport Hazard Class: 5.1, 8
Packing Group: II
DOT Placard: UN Hazard Warning Diamond Class 8 Corrosive Substances


 Nitric Acid 64% Lab/Tech Grade Safety Data Sheet (SDS)

 Nitric Acid 64% Lab/Tech Grade Certificate of Analysis (COA)

Nitric Acid 64.6% Lab Grade

Product form

SKU: NAL64-1QT

$28.00

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    Description

     Nitric Acid 64.6%

    Laboratory / Technical Grade

    *Excellent for gold refining

    Nitric Acid 64.6% (41° Baumé) (HNO3) is a highly corrosive mineral acid widely used in various industrial application.  It is a clear to pale yellow in color and is a strong oxidizing agent known for its corrosive properties.  It is commonly used in chemical manufacturing, metal processing, and as a laboratory reagent. 

    Nitric Acid plays a key role in refining gold, particularly in methods like aqua regia refining and in parting processes.   Urban mining and pcb board gold recovery commonly uses nitric acid to dissolve gold.  *Ships in Level 4 Fluorinated Polyethylene Bottles, 55g ships in HDPE blue drum. 

    Aqua Regia Gold Refining Process (Most Common Use)
    Aqua regia is a mixture of nitric acid (HNO₃) and hydrochloric acid (HCl) in a 1:3 ratio. This combination dissolves gold, which neither acid can do alone.

    Step-by-step Overview:
    Preparation of Aqua Regia:

    Mix 1 part nitric acid with 3 parts hydrochloric acid.

    Dissolution:

    Add impure gold to the aqua regia.

    Nitric acid oxidizes the gold to gold ions (Au³⁺).

    Hydrochloric acid provides chloride ions (Cl⁻) to form chloroauric acid (HAuCl₄), which is soluble.

    Filtration:

    Filter the solution to remove impurities and undissolved metals.

    Precipitation:

    Add a reducing agent like sodium metabisulfite (Na₂S₂O₅) to the solution.

    This causes pure gold to precipitate out of solution as fine particles.

    Washing & Melting:

    Wash the gold powder, dry it, and melt it to form pure gold bars or granules.

     

    Chemical Formula: HNO3
    Molecular Weight: 63.013
    CAS Registry Number: 7697-37-2
    Appearance Colorless to faint yellow
    Odor: Acrid
    Density

    > 1.4078@ 25 °C
    Boiling Point: 248 'F 67.2% HNO3
    Solubility in water: Completely Soluble
    GHS Pictograms:   OxidizerCorrosiveAcute Toxic
    GHS Signal Word: Danger
    GHS Hazard Statements: H272, H314, H330
    GHS Precautionary Statements P210, P220, P260, P264, P271, P280, P284, P301+P330+P331, P302+P361+P354, P304+P340, P305+P354+P338, P316, P320, P321, P363, P370+P378, P403+P233, P405, and P501
    UN Identification Number: 2031
    Proper Shipping Name: Nitric Acid
    Transport Hazard Class: 5.1, 8
    Packing Group: II
    DOT Placard: UN Hazard Warning Diamond Class 8 Corrosive Substances


     Nitric Acid 64% Lab/Tech Grade Safety Data Sheet (SDS)

     Nitric Acid 64% Lab/Tech Grade Certificate of Analysis (COA)

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    We work hard to deliver your items without damage. Orders can be returned or exchanged within 30 days of receiving the parcel, providing they are in original resalable condition.

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