Tender For supply of ar grade laboratory chemicals : : -methanol methyl alcohol ar grade 2. 5 l , acetone ar grade 2. 5 l , p dimethyl amino benzaldehyde ar grade 100g , sodiumhydroxidepellets ar grade 500g , zinc acetate ar grade 500g , silver nitrate ar grade 25g , mercuric nitrate acs grade 100g , sodium sulphite ar grade 500g , sodium hydrogen sulphite ar grade 500g , hydrochloric acid ar grade 2. 5 l , nitric acid ar grade 2. 5 l