| a basic compound, NH4OH, existing only in solution, formed by dissolving ammonia gas in water. |
| ammonium hydroxide n. A colorless, basic, aqueous solution of ammonia, NH4OH, used as a household cleanser and in the manufacture of a wide variety of products, including textiles, rayon, rubber, fertilizer, and plastic. Also called ammonia, ammonia water. |
ammonium hydroxide
solution of ammonia gas in water, a common commercial form of ammonia. It is a colourless liquid with a strong characteristic odour. In concentrated form, ammonium hydroxide can cause burns on contact with the skin; ordinary household ammonia, used as a cleanser, is dilute ammonium hydroxide.
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