Diagnoware (A Brand of Alpha Diagnostics & Traders)

Rothera's Mixture Powder from CDH is a laboratory reagent used for the detection of ketone bodies (acetone and acetoacetic acid) in urine, and it's a slightly red crystalline powder soluble in water. 

A 20% dilute sulfuric acid solution contains 20% sulfuric acid (H₂SO₄) by weight in 80% water. Here’s a guide on its usage and preparation:
- **Applications**: Used in labs and industries for pH adjustment, chemical reactions, and as a catalyst in various synthesis processes. It's also used in battery acid solutions and occasionally in educational labs for experiments.- **Preparation**:  - Always add sulfuric acid to water, never the reverse, to prevent a dangerous exothermic reaction.  - To make a 20% solution, carefully add 20 grams of sulfuric acid to 80 grams of water (or adjust based on volume needed), mixing slowly and allowing the solution to cool as necessary.
- **Safety Precautions**: Dilute sulfuric acid is still highly corrosive and can cause burns. Wear gloves, eye protection, and work in a well-ventilated area or fume hood.
Store the solution in a labeled, acid-resistant container away from incompatible substances (e.g., bases, organic materials).