Is there anything that can replace ammonium chloride?

I don't know what you do. If it is the reduction reaction of iron powder, acetic acid or hydrochloric acid can be used instead.

You can refer to Wang Baoren's organic synthesis reaction, which makes it clear that NH4Cl mainly regulates PH value (buffering effect).

Nitro reduction is special,

1) aniline is usually obtained under acidic conditions;

2) Phenylhydroxylamine is generally obtained under neutral conditions;

3) Rearrangement reaction will occur under alkaline conditions.

In this reaction, ammonium chloride exists as electrolyte, which is beneficial to electron transfer and provides certain acidity, so that the generated iron oxide will not adhere to the surface of iron powder and affect the reaction. Considering the characteristics of the reaction, anhydrous ethanol is not suitable, but acetic acid can be used instead of ammonium chloride, sometimes the effect is better.

If it is used to make gas cylinders, but potassium nitrate is not sold, ammonium chloride can be used instead.

Zhihu user Jia Gaohan

Ammonium chloride is ok.

40ml of water, 30ml of alcohol10g of natural camphor and 3.5g of ammonium chloride will do.

It looks like this.

I tried to make 200ml, and the effect was not very good. I have to continue to explore the formula