pH Neutralization Systems by Digital Analysis Corp.
 Neutralization Chemicals 
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Nitric Acid

There are many chemicals available on the market today that are suitable for use as neutralization chemicals. The most commonly used chemicals are discussed in an article available here:  Neutralization Chemicals.

Nitric Acid - HNO3

Nitric Acid (HNO3): A widely used chemical in many industries. Nitric does not enjoy the popularity that hydrochloric or sulfuric does, as such nitric is more expensive to use than either sulfuric or hydrochloric acid. As with hydrochloric acid nitric will evolve a noxious gas that combines with water vapor already in the air (humidity) to form a very corrosive gas. The gas is very highly corrosive and will attack all metallic objects including building structures, sprinkler heads, copper wiring, stainless steel, etc. Therefore, if HNO3 is used it must be properly vented or used outdoors where the gasses can easily dissipate. For this reason alone we generally recommend against the use of HNO3.

One precaution regarding nitric acid is that it can be a strong oxidizing agent and should not be used when organic material or organic bases are present. Additionally the neutralization of nitric acid or pH neutralization reactions involving nitric will liberate heat, especially when concentrated chemicals are neutralized



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