Ponceau S / scarlet s / acid red 112

English name：Ponceau S；C.I. 27195；3-Hydroxy-4-[2-sulfo-4-(4-sulfophenylazo)phenylazo]-2,7-naphthalenedisulfonic acid tetrasodium salt

Other names: scarlet s; Acid red 112; 3-hydroxy-4 - [2-sulfonic acid-4 - (4-sulfonic acid phenylazo) phenylazo] - 2,7-naphthalene disulfonic acid tetrasodium salt

CAS No.: 6226-79-5

C22H12N4Na4O13S4=760.57

Grade: high purity grade

Em(520nm，H2O)：＞27000

Loss on drying: ≤ 5.0%

Biological staining test: qualified

Water solubility test (0.1%, water): acceptable

Physicochemical properties: Bordeaux red to dark red or brown powder, soluble in water and ethanol, the aqueous solution is rose red. The maximum absorption wavelength is 520 (352) nm. Irritating

Purpose: biochemical research. Biological staining, rapid staining of protein bands after electrophoresis on cellulose acetate. Ponceau S is used to dye proteins on nitrocellulose or PVDF membrane (Western blots). The following is the common dyeing solution preparation: 0.1% Ponceau S (w / V) in 5% acetic acid; 2% Ponceau S (w / V) in 30% TCA; 30% sulfosalicylic acid

Saving: RT