Naphtol AS-D

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Naphtol AS-D
Posting date : Jun 08, 2007
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HS-CODE
29-
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Physical and chemical properties: Cream-colored yellow uniform powder, initial melting point of dry product 193 . Insoluble in water. It is yellow transparent solution when soluble in sodium hydroxide. It can couple with diazoic salt of aromatic amine series ot produce insoluble azoic dyes. Specifications: Grade A Grade B Appearance Light yellow powder Shade Similar(comparison with the standard) Similar(comparison with the standard) Strenght 100 100 Contact 98.5% 96.5% I.M.P of dry product 193 190 Insolubles in alkali solution 0.2% 0.4% Content of Bon acid 0.1% Fineness(resdiue on sieve of 60 mesh) 5% Application: For manufacturing azo dyes, dyeing and printing cotton fibre, viscose fibre and synthetic fibre. Packing: Woven bag, paper bag, polywood drum and iron drum all lined with plastic bag, net weigh

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