NIGROSINE            Our Supplier has upbuilt a modem management system after reformed to be a stock company in 1994.In the meantime, the Corporation has gained the accreditation of ISO 9001:2000 quality standard system by DNV and was accredited Authorized Quantrol Institution Class I of China. For nearly thirty years specialized in fine chemicals, the DIAMOND brand products line contains nigrosine oil soluble, nigrosine spirit soluble, nigrosine water soluble crystal & powder, ferric oxide black, emulsification Span & Tween series. Nigrosine series runs with a year capacity 4000MT.With an emphasis on research and development, environmental protection, quality control and low cost production, the productive technology was well mastered by the Corporation. The Corporation are ready to lead constructive dialogue with its partners and work in partnership with its customers for a mutual success. Technology Innovation: Facing competitive market, the corporation perfect her modern management system continuously by emphasizing technique research and develop, cultivating qualified marketing and technical staff members and improving product quality. Social Progress:Supplying international grade chemical product,the Corporation is ready to update mankind's life quality through the customers's application.    OIL SOLUBLE ANILINE BLACK(NIGROSINE OIL SOLUBLE) Organic solvent dyestuff Index：[CI] TRM SOLVENT BLACK 7 CAS NO.: 8005-02-5 ● Quality index ITEM Strength Particle Size Water PH Value Free Chlorine Free Aniline INDEX up to 100% ≤0.5(over400 mashes/inch) ≤3.0% 7.5～8.5 ≤0.2% ≤1.0% ● Property The product is insoluble in water, slightly soluble in alcohol、benzene and methyl benzene, easily soluble in oleic acid, formic acid and acetic acid. Blue in dense sulphuric acid and blue precipitate after dilution, blue black in dense nitric acid and acid-proof、alkali-proof、good color fastness to light. ● Main uses Raw MATERIAL of the coloring of bakelite powder, bakelite cloth rubber、plastic and leather, also raw MATERIAL of leather shoes oil、carbon paper and insulating paint.   ALCOHOL SOLUBLE ANILINE BLACK (NIGROSINE SPIRIT SOLUBLE) Organic solvent dyestuff Index：[CI] TRM SOLVENT BLACK 5 CAS NO.：11099-03-9 ● Quality index ITEM Water PH Value Ash The Content of Chlorine The Content of Iron Particle Size INDEX ≤3.0% 3.5～5.0 ≤2.0% ≤5.0% ≤1.0% ≤0.5(over 200 mashes/ inch ● Property The product is insoluble in water, soluble in alcohol、benzene and methyl benzene、oleic acid、stearic acid. Blue black in dense sulphuric acid, blue black precipitate after dilution, brown purple precipitate with NaOH. ● Main uses Raw MATERIAL of leather shoes、oil carbon paper and plastics.