# Is powdered acid dangerous? [closed]

I was told that an acid is only dangerous because it releases $$\ce{H+}$$ ions when in contact with water.

Therefore, powdered acid should be completely safe on skin provided that your skin is not covered with sweat.

Am I correct, or is my logic flawed?

• What is ‘powdered acid’ - many strong acids are aqueous solutions. There are some strong organic acids that are non-aqueous, but these will cause damage with or without water. There are some weak acids (eg citric) found in foods which do come as powders, and are not harmful in small quantities with or without water Jul 16 at 17:28
• @NotEvans. Powdered acid like Citric Acid powder. Jul 16 at 17:29
• Oleum has no water, and you wouldn't like to touch it, I assure you. Being solid makes a difference because of hindered mixing. Jul 16 at 18:08
• Citric acid is found in food and has many household applications, it isn’t really a very strong acid at all. That said, contact with skin might cause some irritation, especially in large quantities. Even when ‘dry’ your skin still contains moisture, so the idea that keeping things dry isn’t really relevant Jul 16 at 18:09
• If you need an inorganic example, take sodium hydrogen sulfate. Jul 17 at 7:21