Nitric Acid

CAS RN: 7697-37-2

Disposal Methods

SRP: The most favorable course of action is to use an alternative chemical product with less inherent propensity for occupational harm/injury/toxicity or environmental contamination. Recycle any unused portion of the material for its approved use or return it to the manufacturer or supplier. Ultimate disposal of the chemical must consider: the material's impact on air quality; potential migration in soil or water; effects on animal and plant life; and conformance with environmental and public health regulations.
Disposal of waste nitric acid into sewers or watercourses should not be permitted until the ph of the soln is /SRP: adjusted/ to a range of 5.5-8.5.
Recovering: Sodium carbonate-calcium hydroxide is added to form the neutral soln of nitrate of sodium and calcium. This soln can be discharged after dilution with water. Also, nitric acid can be recovered and reused. Recommendable methods: Neutralization & discharge to sewer. Not recommendable method: Landfill. Peer-review: Prior to neutralization dilute 10 times. Beware - Potential toxic. (Peer-review conclusions of an IRPTC expert consultation (May 1985))
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