supply of lab testing chemicals make emerck rankem sd fine chemical qualigen , acetic acid glacial ( ar ) ( pack of 500 gm each ) , ammonia buffer ( pack of 500ml each ) , i-amino-2-napthol-4-sulphonic acid ( ans ) ( pack of 100mgs each ) , barium chloride ( pack of 100gms each ) , buffer tablet ph4 ( pack of 10 capsules each ) , buffer tablet ph7 ( pack of 10 capsules each ) , buffer tablet ph9.2 ( pack of 10 capsules each ) , benzene ar ( bottle of 2.5l each ) , citric acid ( pack of 500 gm each ) , chlorotex reagent ( bottle of 100ml each ) , ethonal ( bottle of 2.5 l each ) , hydrochloric acid ( bottle of 2.5 l each ) , hydrochloric acid ( ampule 1 n ) , methyl orange solution ( bottle 200 ml each ) , oxalic acid ( 500gm ) , potassium hydroxide ( pack of 500gm each ) , potassium chloride ( pack of 500gm each ) , pyraglol of 100gms each ) , silver nitrate ( pack of 25gm each ) , sliver nitrate ampule n / 10 , sodium hydroxide ampule 1n , sodium sulfite anhydrous ( pack of 500gm each ) , sodium di-sulfite ( pack of 500gm each ) , toluene ( each 2.5 l bottle ) , universal indicator ( each 500ml )