It is very toxic. In fact, there is a website with all of that which I posted in the related links box below.
Nitric oxide (NO) is very toxic by inhalation.
When nitric acid reacts with iron, it produces nitric oxide gas, iron(II) nitrate, and water. The reaction is exothermic and may produce heat or gas. It is important to perform this reaction in a well-ventilated area because nitric oxide gas can be toxic.
Nitric oxide
NO (Nitrogen and Oxygen)
The common name of nitric oxide is simply "nitric oxide." It is a colorless gas with the chemical formula NO. Nitric oxide is a key signaling molecule in the human body, playing important roles in vasodilation, neurotransmission, and immune response.
NO-gas is colourless
Nitric oxide, which is a colourless toxic gas that reacts with oxygen to form nitrogen dioxide.
Nitric oxide myoglobin is a form of myoglobin that can bind to nitric oxide. This interaction helps regulate blood flow by releasing nitric oxide, which acts as a vasodilator to increase blood vessel diameter and improve oxygen delivery to tissues.
Nitric oxide is considered a neutral oxide, as it does not exhibit distinct basic or acidic properties. It reacts with both acids and bases to form different compounds.
When hemoglobin releases oxygen and nitric oxide to tissues, nitric oxide causes blood vessels to dilate, increasing blood flow and delivering more oxygen to the tissues. This helps improve oxygen delivery and tissue function.
Nitric oxide is produced in the body by a group of enzymes called nitric oxide synthases (NOS). These enzymes convert the amino acid arginine into nitric oxide. Nitric oxide is a potent signaling molecule with various roles in the body, including regulating blood flow and supporting the immune system.
+2 is the valency of nitrogen in compound HNO3(nitric acid)