hot sell top quality 143-74-8 phenol red reliable manufacturer
product name:phenol red
cas no. 143-74-8
mf: c19h14o5s
mw: 354.38
ph indicator range: 1.2 (orange) -3.0(yellow) 6.5(yellow-brown)- 8.0(pu…
wuhan kemi-works chemical co., ltd, specialized in r&d, production and sales of pharmaceutical intermediates, electronic chemicals, organic fluorine surfactant, electroplating chemicals etc.
at present, our products include: triazole, ethylacetoacetate derivatives, diphenylamine homologue, biphenyl compounds, perfluoroalkyl and its derivatives and special chemicals used for metal surface treatment such as electroplating intermediates, electrophoretic lacquer etc.
hot sell top quality 143-74-8 phenol red reliable manufacturer
product name:phenol red
cas no. 143-74-8
mf: c19h14o5s
mw: 354.38
ph indicator range: 1.2 (orange) -3.0(yellow) 6.5(yellow-brown)- 8.0(purple) maximum absorption wave-length(nm): λ1(ph1.2) 503---506 λ2(ph 3.0) 430---435 λ3(ph 6.5) 430---435 λ4(ph 8.0) 557---560 mass absorption coefficient(l/cmg) α1 (λ1,ph 1.2,dry sample)110---123 α2 (λ2,ph 3.0,dry sample)60---68 α3 (λ3,ph 6.5,dry sample)62---72 α4 (λ4,ph 8.0,dry sample)115-130 solution test in alkali: qualified loss on drying: 1.0%max residue on ignition (as sulfate): 0.2%max
wuhan kemi-works chemical co., ltd, specialized in r&d, production and sales of pharmaceutical intermediates, electronic chemicals, organic fluorine surfactant, electroplating chemicals etc.
at present, our products include: triazole, ethylacetoacetate derivatives, diphenylamine homologue, biphenyl compounds, perfluoroalkyl and its derivatives and special chemicals used for metal surface treatment such as electroplating intermediates, electrophoretic lacquer etc.