ASYCUDA
  Online 2012 Harmonised Commodities Code database

You can enter a keyword or the first few digits from the commodity code, e.g. enter "book" to view commodities with the word book in the description, or enter"490" to view commodities whose code begins with 490.  Commodity codes can be as general as 1 digit or as specific as 6.

Commodities with Chapter Code: 50

Commodity Code Description
Section 11 : Textiles and textiles articles
   Chapter 50 : Silk
     Heading 5001 : Silk-worm cocoons suitable for reeling
500100 Silk-worm cocoons suitable for reeling
     Heading 5002 : Raw silk (not thrown)
500200 Raw silk (not thrown)
     Heading 5003 : Silk waste (incl. cocoons unsuitable for reeling, yarn waste, etc)
500310 Silk waste, not carded or combed
500390 Silk waste, carded or combed
     Heading 5004 : Silk yarn (excl. spun from silk waste), not put up for retail sale
500400 Silk yarn (excl. spun from silk waste), not put up for retail sale
     Heading 5005 : Yarn spun from silk waste,not put up for retail sale
500500 Yarn spun from silk waste, not put up for retail sale
     Heading 5006 : Silk yarn, put up for retail sale; silk-worm gut
500600 Silk yarn, put up for retail sale; silk-worm gut
     Heading 5007 : Woven fabrics of silk or of silk waste
500710 Woven fabrics of noil silk
500720 Woven fabrics of silk, containing >=85% silk or of silk waste
500790 Printed woven fabrics, containing <85% silk