Anhydrous nitric acid bubbles at 355.6 K (83.6°C) and develops a white solid on freezing at 231.4 K (- 41.7°C). It has a corrosive activity on the skin and causes yellow rankles. Chemical Properties of Nitric Acid Stability. Nitric Acid in pure form is not exceptionally stable.

Nitric Acid Test. If you are making a big investment, one of the last steps you can do to verify the authenticity of your gold is by performing the nitric acid test. But bear in mind that nitric acid may be difficult to acquire and it may also be best to leave this test to a jeweler.

Properties . Nitric acid (CAS Number: 7697-37-2) is a highly corrosive mineral acid, which is sold by nitric acid manufacturers and nitric acid suppliers by different names such as spirit of niter, eau forte, aqua fortis, acidumnitricum and hydrogen nitrate. In its pure state, it is colorless and when oxides of nitrogen and water are present, it behaves as a yellow or red fuming liquid.HNO 3

CAS: 7697-37-2 MDL: MFCD00011349 EINECS: 231-714-2 For elemental metal analysis via atomic absorption and ICP instruments. Actual Lot Analysis on label. Color-coded label to match acid cap.

Find nitric acid in South Africa! View Gumtree Free Online Classified Ads for nitric acid and more in South Africa. What are you looking for? in gold furnaces, aqua regia, nitric, borax gold pans, miners moss, m ercury, Niton Xrf, UV light Gold wash plants Call 0740969729 Read More. Johannesburg South 9 days ago. Added to List Add to My

I wonder if making crude Nitric acid with 31 percent Hydrochloric acid and Sodium Nitrate to dissolve more gold would work? It would be quite expensive 60 dollars for 100 g Sodium Nitrate on Ebay. Also, HCl + H202 did dissolve gold I plated with it! You can clearly see the gold.

Nitric acid is commonly used to dissolve gold from printed circuits boards by making aqua regia, typically 1 part Nitric acid to 3 parts Hydrochloric acid. Molarity: 15.7M Specific Gravity: 1.4. This chemical ships only within the lower 48 US states using Standard Ground. HazMat fee applies. Adult signature required upon delivery.

It's just concentrated nitric acid, probably the standard 68%. Perfect for someone who just wants a small amount to mess around with. You could use it to detect <14K gold (the intended purpose) because silver and copper among other alloying metals dissolve in it, but gold doesn't.

Dec 02,  · You can buy nitric acid online from a lab supply company. 3 Create aqua regia by adding hydrochloric acid. Add hydrochloric acid to the beaker containing the nitric acid and scrap gold.

Sulfuric Acid is used as a water quality testing reagent for swimming pools. It seems that pool supply companies are allowed to purchase quantities of both Sulfuric and Nitric acids, and you can pay cash without worry about your name and address being associated with the purchase of those acids.

If you are using nitric acid, add 30 ml to the container for each ounce of metal. If you are using MX3 or other nitric acid substitute for each ounce of metal. If you're using a nitric acid substitute: add 120 ml of hydrochloric (or muriatic) acid to the container, along with your substitute reagent. The MX3 will not have any effect until this

Nitric Acid. Nitric acid is a clear to slightly yellow aqueous solution that has been treated to remove most free nitrogen oxides. This intermediate chemical is a strong mineral acid used in the production of nitrate based fertilizers, nylon precursors and other specialty chemicals.

Feb 25, · March 6, 2010. A. Ferrous Sulfate is commonly used to precipitate gold without precipitating more than traces of the platinum group metals. However, this can only be done by first removing any free nitric acid still present in the aqua regia solution.

In this video I show you an easy source to get a decent volume of nitric acid on the cheap. This idea was originally sourced from Myst32YT so give him some l

Bausch Nitric (HNO3) Acid 69.8% 10L CP Laboratory Grade Gold and Silver Refining 5 out of 5 stars (8) 8 product ratings - Bausch Nitric (HNO3) Acid 69.8% 10L CP Laboratory Grade Gold and Silver Refining

Buy Gold Recovery Chemicals And Gold Refining Chemicals Online At LabAlley.com. Gold Recovery Chemicals List. Buy Nitric Acid For $15; Buy Hydrochloric Acid For $13; Muriatic Acid (Hydrochloric Acid) Acetic Acid (Vinegar) Sulfuric Acid; Hydrofluoric Acid; Sodium Bicarbonate; Buy Mercury Metal (Liquid Mercury) And Triple Distilled Mercury For Gold Amalgamation

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Dab this golden streak with concentrated nitric acid (the Au 585 testing acid) and after waiting about 5 seconds, check the reaction against the table shown here. Where exposed to nitric acid, gold is not attacked, but silver is converted to gray-colored silver nitrate AgNO3 and copper reacts to become to greenish copper nitrate Cu(NO3)2.

PACKAGE INCLUDES:1). GOLD TESTING SOLUTION KIT-14ct acid solution(15ml)-yellow-18ct acid solution(15ml)- green-20ct acid solution(15ml)- blue-Test padThe gold test solutions contains concentrated acids and other potentially harmful chemicals. Acid is corrosive and care should be taken when using. Keep out of reach of children.

You can buy nitric acid in our online shop, where we supply it in pack sizes ranging from 2.5L containers to 1000L IBCs. ReAgent supplies nitric acid in a range of concentrations, from dilute solutions to solutions that are approximately 72% concentrated. We supply nitric acid in various grades, including analytical, general and technical grade.

Sep 03,  · If gold is mixed evenly in the alloy and at a low enough concentration, you can use plain nitric acid to dissolve away impurities. However, if the gold is more pure (or is an external plating), what actually happens is that the nitric acid tries to dissolve everything, but the gold

For over 30 years, ChemSupply Australia has provided our customers with the chemicals, reagents and ingredients they need to succeed.. Our business units — CSA Scientific, CSA Pathology and CSA Ingredients — are specialists in their own markets, which means that all our customers benefit from our expertise. With quality-assured Australian manufacturing, logistics, and administration

May 22, · I buy scrap gold from market , granulate it and digest it to aqua regia digestion. The excess nitric of the gold solution is driven with urea addition till the point where the urea does not react any more. Then I use pure S0 2 to precipitate the gold. but I do not get the full recovery . I get only 75%. rest I have to get thru metabisulphite

Acetic Acid 99% Citric Acid Monohydrate Hydrochloric Acid 33% Nitric Acid 60% Phosphoric Acid 85% Sulphamic Acid Sulphuric Acid 98% Ammonium Hydroxide 25% Calcium Chloride Caustic Soda Flakes 98% Caustic Soda Lye 50% EDTA Hydrated Lime Hydrogen Peroxide Potassium Hydroxide 90% Soda Ash Dense Sodium Chloride Coarse Sodium Hexametaphosphate

mixture of nitric acid and hydrochloric acid at molar ratio 1/3) In my case, I have 18K gold scrap, but the purity of gold makes no difference as gold will be purified to 24K during the process. The reaction of gold and aqua regia produces toxic fumes so the process must be conducted outside or in the fume hood.

Feb 24, · Nitric acid was used for the extraction of gold. Place radio components in a glass jar, fill it with nitric acid and heated. Furthermore, how do you remove precious metals from circuit boards? Method 1 Removing Gold Using Nitric Acid. Get protective gear. Purchase concentrated nitric acid. Put your circuit boards in a glass container.

Mar 25, · i was told that i could make nitric acid by mixing 1qt sulfuric acid +1/2 cup sodium nitrate. i am new to refining and need all the info i can find. i am guessing that i can buy hydrochloric at an auto parts store because i think it is used in car batteries. but i want to buy the acids/chemicals already made to make it as easy as possible during my first few attempts at refining. i have pounds

Various Nitric acid solutions are dropped onto the line to determine if the item is gold and if so, what carat it is. The consultant will then need to verify that the item is solid and not gold plated. A file test is done by gently scratching the surface and place a drop of acid on the item.

Oct 01, · Article Summary X. To remove gold from circuit boards, start by purchasing concentrated nitric acid from an industrial or chemical store. You’ll also need a face mask, safety glasses, and industrial gloves to work with nitric acid, since it can harm your skin and eyes and cause nausea if it’s inhaled.

Nitric Acid 60%. $520.00. Hydrogen Peroxide 50%. $1796.00. Kemcore continues to be instrumental in procuring a complete suite of reagents for our gold/copper flotation plant. New rolling stock strengthens Kemcore ’s leading position in the supply and transportation of sulphuric acid from South Africa to Zambia and Congo. Sodium

Dec 19,  · Nitric acid reacts with copper. Not with gold. This is how the test works:When nitric acid contacts copper, a green, fizzy, bubbly and smoky reaction occur