Orange II / acid orange II / golden orange II / acid golden yellow II

English name：Orange Ⅱ；Acid orange 7 ；Acid orange A；β-Naphthol orange；Tropaeolin O

OO No.2；C.I. 15510

Other names: Acid Orange II; Golden orange II; Acid golden yellow II; 2-naphthylazo sodium p-benzenesulfonate; Orange No. 2; Orange yellow Ⅱ; Acid orange; β- Naphthol orange; Acid No. 2 orange; Acid Orange 7; 4 - (2-hydroxy-1-naphthylazo) benzenesulfonic acid sodium salt; Golden Lotus orange OOo; β- Naphthol azo sodium p-benzenesulfonate; Golden yellow powder; 2-naphthylazo sodium p-benzenesulfonate

CAS No.: 633-96-5

C16H11N2NaO4S•5H2O=440.41

Grade: BS

Biological staining experiment: qualified

Physicochemical properties: Orange needle crystal or powder. 1g is dissolved in 20ml water, the aqueous solution is red yellow, and it is orange when dissolved in ethanol. Adding hydrochloric acid to the aqueous solution will produce brownish yellow precipitate, adding sodium hydroxide will be dark brown, adding sulfuric acid will be red, and when diluted, orange yellow precipitate will be obtained. The maximum absorption wavelength is 484nm. Irritating. When dyeing, it tends to be red and dark when encountering copper ions, and light and dark when encountering iron ions. Good discharge. PH discoloration range: 7.4 (Amber) ～ 8.6 (Orange); 10.2 (Orange) ～ 11.8 (red).

Purpose: biochemical research. Acid base indicator, biological stain. Reagents for extraction and spectrophotometric determination of cationic surfactants

Saving: RT