Luoyang Hanyi Chemicals Co.,Ltd.

• dyeinter

We offer 4, 4-diaminostilbene-2, 2-disulfonic acid(81-11-8). 1)light yellow cream or powder, soluble in ethanol and ether; insoluble in water, easily soluble in alkaline solution. 2)can be easily oxidized into red; has the property of aromatic acid or aromatic amine purity:min 95.5% main use: in the manufacture of fluorescent brighteming agentã£ï¿½ï¿½chrysophenine g and direct yellow r, also as pesticides.

• Dyechem

We offer 4, 4 Dinitrostilbene 2, 2 Disulfonic Acid. Quality index: Item Index (1)Appearance orange powder (2)Binitro acid content(gross dry product) min 65.0% (3)binitrobenzyl compound (gross dry product ) max 0.5% (4)Other organic impurities(gross dry product )max 2.0% (5)Inorganic salt(gross dry product max 2.0% (6)Water insolubles(gross dry product)max 1.0% Main use: it is an intermediate of dyes. Packing: 25kg plastic woven bag.

• dyeinter

We offer p-nitrotoluene-o-sulfonic acid(121-03-9). Quality index: item index (1)appearance milk white crystal (2)assay (gross sample) min 80.0% (3)moisture (gross sample) max5.0% (4)free acid (gross sample)max 1.0% (5)insolubles(gross sample)max 0.1 % main use: it is an intermediate of dyes, can be used to manufacture yellow r.