Sulphur Black 2

2,4-Dinitrophenol and Picric acid?or 2-Amino-4,6-dinitrophenol mixture with Sodium polysulfide solution heating.

blue black. In the Sodium sulfide solution solubility is very good, solution for blue black; In concentrated sulfuric acid for the blue black, dilution after black precipitation.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Fulling	Persperation Fastness	Soaping
						Moderate	Severe
ISO	5	4	6-7	5	5	5	4-5
AATCC	5	3	7-8	4			4-5