Nitric acid, or HNO3, is a highly corrosive and toxic acid. It is also known as spirit of nitre or aqua fortis (L. “strong water”). A strong oxidizing agent, pure anhydrous nitric acid is colorless, but older samples tend to acquire a yellow cast due to nitrogen oxide accumulation. It is a mobile liquid and is completely soluble with water. Nitric acid is commonly used for photoengraving, drug manufacturing, jewelry making, and engineering purposes.
Hazards:
- Storage: Protect substance against mechanical injury from containers. Separate nitric acid from turpentine, combustible materials, carbides, metallic powders, fulminates, picrates, and chlorates. It should not also come in contact with cartridges and canisters that contain oxidizable materials like activated charcoal.
- Handling: Use product in a well-ventilated area. Always add slowly and in small amounts. Add acids to water and not the other way around. Adding to water releases heat which may cause splattering and boiling, so never use hot water. Dispose empty containers of this substance as they may be hazardous.
- Protection: Wear protective clothing like lab coat, gloves, boots, and full-face shield prior to handling. Eliminate all sources of ignition.
