Product Details: Litmus Red Indicator Paper Parameter Details Product Name Litmus Red Indicator Paper Type Acid-Base Indicator Paper Colour Change Turns blue in contact with alkaline/basic solutions Range Approx. pH 4.5 – 8.3 Form Strips or roll (commonly 4 m × 7 mm) Usage For quick acid/alkali detection in laboratory analysis Packing Usually 100 strips or 5 m roll per pack Storage Cool, dry place away from acids/alkalis vapours Shelf Life ~2 years under normal lab conditions Equivalent Products Litmus Blue Paper, Universal pH Paper Make / Brand (examples) Merck, Loba Chemie, Qualigens, SDFCL, Himedia, etc. HSN Code 3822.90.00 (for prepared diagnostic/reagent papers) GST Rate 18 % 🔹 Typical Uses Laboratory qualitative acid–base testing Educational experiments and chemistry demonstrations Quick field testing for chemical and water samples