Citric acid - 1 kg

Citric acid is a great natural household product. It is one of the most common acids in nature: plants produce it (lemon contains citric acid) and so does the human body. It will be very useful to you as an anti-limescale (kettle, washing machine, etc.) and anti-oxidant (protection against rust). It is also a food additive and is often used as an additive in cosmetics and pharmaceuticals. It is completely biodegradable. This makes it a staple in your natural cleaning products cabinet!