Superiority:
Hangzhou Dingyan Chem is a leading manufacturer and supplier of chemicals in China.We develop,produce and distribute high quality pharmaceuticals, intermediates, special chemicals and other fine chemicals.
We could give you:
1.Best quality in your requirement
2.Competitive price in China market
3.mature Technical support
4.Professional logistic support
All we want is win-win business. Send yr. inquiries, you will get it!
Details:
"Appearance Green brown to brown powder
PH 1.2(pink)~2.8(yellow)
7.4(brown-yellow)~9.0(purple)
Maximal absorbing wavelength,nm
λ1(Ph1.2)
λ2(Ph2.8)
λ1(Ph7.4)
λ2(Ph9.0)
526~529
431~437
431~437
576~580
Quality absorption coefficient,L/cm.g
α1(λ1,Ph1.2, dry base)
α1(λ1,Ph2.8, dry base)
α1(λ1,Ph7.4, dry base)
α1(λ1,Ph9.0, dry base)
80~94
40~46
39~45
75~86
Ethanol solution testing Pass
Residue on iginition 0.25% max
Loss on drying 1.0% max
"