| Physical and Chemical Properties | Dark green powder. Insoluble in water, soluble in sodium sulfide solution is blue-gray. In sulfuric acid as a dark yellow solution. |
| Use | vulcanized bright green is mainly used for dyeing cotton, hemp, viscose fiber and its fabrics, with bright color and good levelness, dyeing fastness is good, in a certain range can replace the vat dyes. |
| production method | using phthalocyanine blue as raw material, firstly chlorosulfonation reaction of phthalocyanine blue with chlorosulfonic acid and chloride sulfoxide, iron powder and thiourea were then added for reduction and sulfur was added. Finally, the final product is obtained by filtration, neutralization, re-filtration, drying and pulverization. |