Sulphur Black BR, BN, 522, 521, dyes Manufacturer 1. Names: Sulphur Black 1, 2, 4-Dinitro-Phenol Sulfurised, Sulphur Black B/ Br, Sulphur Black Br, Sulphur Black B521, Sulphur Black B522. 2. Specifications: SGEF Appearance: Black- flakes/ granular Strength: 200+ -3 of the standard Shade: Near to the standard Alkali insoluble: